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p. 2341 (#1305)
PROFESSIONAL NOTES
PREPARED BY
LIEUTENANT COMMANDER H. W. UNDERWOOD, U. S. Navy
FROM SEPTEMBER 3 TO OCTOBER 3
PS
............................................
2342
2356
The New Bress and Par
e........
GENERAL ARRANGEMENT
SOME BRITISH VIEWS ON DIRIGIBLES AND FUTURE CONSTRUCTION OF
SURFACE SHIPS ......
FRANCE
The French Naval Renaissance.....
..... 2352
French Destroyer Trials.....
2354
French Light Cruisers and Flotilla Leaders ......
2355
GREAT BRITAIN
Navy Progress and Pacts......
The New Battleships .........
2357
The British Navy's Needs and the Mosul Issue..
2360
The Airship Controversy.........
2361
JAPAN
A Peace Protest from Tokyo.......
2362
America, Let's Reason Together.....
2365
UNITED STATES
Ships Building.
2370
The Air Board Personnel...
2370
The Mitchell Plan.........
2372
The Aeronautical Crisis. ......
2377
AVIATION
The Pulitzer Races...
2379
The Progress of Civil Aviation (British)..
2382
Anti-Aircraft Defense ...
2383
ENGINEERING
The Wing Rotor ......
2390
The Position of British Marine Engineering ......
........2391
Thornycroft Shallow-Draught Ships for China
2394
The Stability of Ships.......
2396
MERCHANT MARINE
The Shipping Board and Admiral Palmer .........
2397
The Shipping Board Controversy....
MISCELLANEOUS
The Trade and Industry of Persia...
2401
Amphibian Operations
2403
A New Industry.........
2405
CURRENT NAVAL AND PROFESSIONAL PAPERS..
2406
.......................
...............................
2400
p. 2342 (#1306)
2342
Dec.
U. S. Naval Institute Proceedings
SOME BRITISH VIEWS ON AIRSHIPS AND FUTURE NAVAL
CONSTRUCTION
Editor's Note: Although the following may not disclose anything new
on the subject matter which has occupied the front pages of the press the
past few months, it may be of interest to our members to know some
British viewpoints. In addition to the following the reader is advised to
refer to pages 1756-1758, Professional Notes of the September, 1925, PRO-
CEEDINGS of the Institute, and to the article in the Saturday Evening Post
for October 24, 1925. See also "Secretary's Notes," this issue.
The following correspondence sent to the Editor by Admiral Sir W. H.
Henderson, (Retired) Royal Navy, is printed with his permission.
Sept. 4, 1925
Following up my letter to you enclosing an article on "Airships," pub-
lished in the Evening Standard, I am sending cuttings of some correspond-
ence that has taken place in the Morning Post between its naval corre-
spondent and me.
By an extraordinary coincidence my last letter was published in yester-
day's issue, the day of the loss of the Shenandoah, which I regretted very
much to hear of, especially accompanied as it was by the loss of so many
good lives. Pray accept this, my expression of sympathy.
I feel sure I am on the right track on this question of airships and that
soon it will be realized in the United States that they are fair weather craft
only, and, as such, may be used in some selected positions for reconnaissance
work, but that for commercial purposes they will never be a paying propo-
sition or to be depended upon.
Please make any use of the cuttings you like.
Are Airships Futile?
Need for Charting the Upper Air; The New Navigation, Morning Post,
22 June, 1925.-Two of the sailor's greatest assets in navigating from port
to port are his compass and his charts. The first gives him a sense of
direction when there is nothing else to guide him, while the latter show him
not only the depth of the water, the configuration of the land, and rocks,
shoals, or other dangers, but also there are special charts indicating the
prevailing winds, ocean currents, and tidal streams.
The use of these navigational appliances has become second nature to the
mariner; he steers by his compass in mid-ocean with the same confidence
that a man walks a well-known track in the dark; he reads his chart as the
motorist consults his road map, but with this difference: the motorist wheels
his way on solid earth, the seaman has to be ever on the alert for being
set out of his course by winds and currents.
As an old seaman, it has occurred to Admiral Sir William Henderson
that the airship is likely to find itself in a sorry plight because it may
encounter wind currents of 100 miles an hour against which, even with a
speed of 70 m.p.h., it could make no headway at all.
Writing in an evening contemporary he has elaborated this argument and
other disabilities which he maintains are inherent in the lighter-than-air
craft. He arrives at the conclusion that the airship "disregards the first
principles of transport, which are that a ship .... must have a power of
motion of its own greatly in excess of the medium in or on which it moves."
From this he argues that airships can never be more than fine weather craft
and that the country is wasting money in producing them.
This is a serious charge, for airships are costly things, and we cannot
afford "fair weather" luxuries which cannot pay their way in peace, and
would have very limited value in war. The revival of a government policy
to build airships has been largely due to the fact that the Admiralty has
p. 2343 (#1307)
1925)
2343
Professional Notes
strongly emphasized their potential uses for commerce protection in war.
If airships are to be used by the navy they must be able to operate under
far more arduous conditions than those to be encountered on a set route in
favorable weather.
If there is no answer to Admiral Henderson's arguments, the future of
these aircraft would indeed seem gloomy, but he appears to have viewed
everything from the plane of the ocean's surface. He, doubtless, has in
mind the monsoons, hurricanes, gales, and storms which prevail in various
parts of the world according to the times and seasons. Moreover, he
stresses the fact that whereas the ship of the sea can generally find a
natural shelter, the airship is at the mercy of the elements until once more
safely housed in its shed.
It is natural that these influences should present themselves to the
seaman as formidable objections to this new means of transport, and no
one will appreciate better than he the need for investigating this problem
fully before being unduly optimistic about the future of airships. Unless,
however, "seasense" and "airsense" are combined, the one is liable to lack
imagination and the other experience in reviewing this matter.
If airships are to navigate safely it is essential that the upper air should
be charted in the same way that sea currents and surface winds have been.
It is impossible to exaggerate the importance of this work. When we
know with reasonable accuracy the prevailing winds and air currents at each
successive strata of the world's atmosphere from 1,000 to 30,000 feet, air-
ships may be able to navigate with the same degree of security as ships of
the sea.
At 5,000 feet there may be a raging gale against which an airship would
battle in vain; at 10,000 there may be a flat calm, and at 15,000 a favorable
breeze. In fact, airship routes, out and home to the Far East, may become
established at regular altitudes corresponding with the season of the year,
just as sailing ships and, to a less degree, steamships vary the latitude of
certain of their routes.
The Meteorological Department, which is coordinated at the Air Ministry,
is known to be investigating this big problem, but the means at present at its
disposal would seem to be quite inadequate.
The subject is an international one, for it affects all civil aviation, and it
is essentially one in which the navy should assist, and in which the aid of
the mercantile marine should be enlisted. Observations of the upper air are
taken to a great extent by releasing small free balloons and observing their
behavior. Here again the seaman with his aptitude for using a sextant
must prove invaluable. The navy is vitally interested in the future of air-
ships. It is therefore to be hoped that the Admiralty will take an active
hand in charting the upper air.
For the rest one cannot but think that Admiral Henderson is unduly
pessimistic. In arriving at his conclusions he recalls many of the misfortunes
which have occurred to airships, but makes no allusion to their achievements.
The United States Naval airship Shenandoah has been out in fair weather
and foul for well over a year now. During that time it crossed the Rockies
in a gale, sailed down the Pacific coast, and returned in safety to its base
on the Atlantic side.
Our own R-34 crossed and recrossed the Atlantic safely, and R-33 made
a notable trip across the North Sea and continent. The Atlantic has more
lately been crossed by ZR-3, now the Los Angeles. These are not the
achievements of fragile craft incapable of facing the elements. Little air-
ships were out constantly in bad weather patrolling the coast during the war.
The airships now building, which Admiral Henderson regards as "un-
wieldy monsters," but mark the logical progress of events. The giant
liners of today would have seemed "unwieldly monsters" to Columbus, yet
they are the outcome of the brave endeavors of those who set forth, fear-
p. 2344 (#1308)
2344
(Dec.
U. S. Naval Institute Proceedings
ing neither winds, currents, nor uncharted seas, and with no certainty of
finding shelter.
In the same spirit pioneers of this new means of transport will launch
their craft into the blue, but, today, science makes it possible to investigate
in advance the obstacles and perils which await them, and to provide resting
places in the form of mooring masts, so situated that an airship can always
run for safety, as a ship makes for harbor.
The seaman has done battle with the elements for countless generations;
to him should be entrusted all that appertains to this new navigation.
Airship Problems
Difficulties of Navigation, Morning Post, 8 August, 1925.—To the Editor
of The Morning Post.—Sir:-Your Naval Correspondent in your issue of
June 22 makes the grave and inevitable admission that if an airship has
not a speed comparable to, or even greater than, the current in which she
happens to be immersed, and if she cannot extricate herself from this cur.
rnt by rising to a higher and possibly safer region, then air navigation by
an airship is difficult if not impossible.
To escape from this dilemma he asserts that "it is essential that the upper
air should be charted in the same way that sea currents and surface winds
have been." Sea currents, which are subject to little variation, are well
known and accurately charted. The prevailing winds, however, except in
the tropical regions of the trades and monsoons, which vary within con-
siderable limits and are subject to dislocation by hurricanes, cyclones, and
typhoons, are only given as an average of an enormous number of direct
observations, extending over a long period of time. They vary daily and
even hourly, both in speed and direction, and can only be used as possible
approximations. It would be impossible to obtain even such approxima-
tions by any known means of observation in the upper currents of the
atmosphere.
The lifting power of an airship depends upon the buoyancy of her gas
bags. This lifting power is dependent on the pressure of the atmosphere in
which the ship is immersed, and taking the extreme height mentioned by
your correspondent of 30,000 feet as an example, where the mean tempera-
ture is 50°, and no human being can exist, the pressure is less than one
third of that at the surface of the earth, and her lifting power would be
inadequate to support her own weight, it being assumed that gas has been
released to reduce the internal pressure to that of the surrounding atmos-
phere. If gas is retained the lift is still further reduced, and the gas bags
may burst.
Whatever the height at which the ship is navigated these relative condi-
tions hold good; gas, which is a valuable and expensive commodity, has
often to be released, and must be replaced as soon as possible for naviga-
tion in the lower regions, therefore, filling stations must be available.
As a matter of fact, an airship is totally incapable of rising to the heights
mentioned. The maximum possible rise of one, assuming that the weight of
her hull, machinery, and other items is only two thirds of her total lift, is
under 10,000 feet. This disregards the dynamical lift of her rudders, against
which has to be set a safe margin to be allowed for increase of weight
caused by such ordinary contingencies as a fall of snow, a shower of rain,
a heavy fall of dew, on her enormous surface. A normal fall of the
barometer, even, affects these conditions, so the height to which an airship
can attain carrying a full cargo is relatively small.
When the limitations of "lift" of an airship are understood, it will be
realized that the proposed establishment of a "network of ship stations in
the Atlantic for daily attacks on the atmosphere with pilot balloons, kites,
registering balloons, and aeroplanes" and "the investigation of the whole
p. 2345 (#1309)
1925]
2345
Professional Notes
region of the atmosphere up to 30,000 feet,” would be futile, and an un-
warrantable waste of money, for in view of the impossibility of an airship
ever reaching more than a fraction of these heights, the precise value of
these expensive investigations from an airship point of view appears to be
nil. A chart of the upper air would be out of date in a short time, whereas
one of the sea holds good for centuries.
The “logical progress" of events is referred to. The history of our air
fleet cannot be regarded as logical or in any way analogous to the gradual
and continuous development of primitive seagoing craft to great ocean
liners. Our present air fleet, R-33, R-36, R-37, R-80, L-64, and L-75, have
all been in their hangars since 1921, except for the brief and checkered
career of R-33 in April last.
After this period of inertia arising presumably from incapacity for use-
ful employment, two gigantic airships with correspondingly large and ex-
pensive paraphernalia are in process of construction, notwithstanding the
fact that these ships are in every respect subject to the like conditions of
current, to the same inability to rise to the heights which your correspond-
ent has himself stated to be essential, and liable to the identical dangers
which have ended the careers of most airships since 1910.-Yours,
W. H. HENDERSON, Admiral (Retired)
3 Onslow Houses, S.W. 7.
Airships of the Future
Increased Interest; Commercial and War Requirements, Morning Post,
15 August, 1925. (By Our Naval Correspondent.)—The continued success
of the United States' naval airships, and the progress being made on the
designs of our new big lighter-than-air craft are leading to increased atten-
tion being paid in both countries to the future of airships, both for commer-
cial purposes and as units of the fleet.
Admiral Sir William Henderson, in his letter published in the Morning
Post of August ii, returns to his attack on the policy of building airships
which he started in a contemporary a couple of months ago. Referring to
an article of mine on the subject, which appeared in these pages on June
22, he entirely misconstrues my meaning when he says I make "the grave
and inevitable admission that if an airship has not a speed comparable
to .... the current in which she happens to be immersed, or if she cannot
extricate herself .... by rising to a .... safer region then airship naviga-
tion is difficult if not impossible.” This is the basis of his own contention
that in building airships we are wasting money. I do not agree that it is
necessary for an airship to have a speed comparable to any current in which
she may find herself, and his deductions as to lifting powers are misleading.
In the article referred to I was reviewing the future of airships largely
from the point of view of their utility to the navy, and I pointed out that
for such a purpose they would have to operate under far more arduous
conditions than those appertaining to a set route in favorable weather
The ideal naval airship should be able to remain several weeks in the
air in any part of the world where ships are wont to sail the seas, and to
maintain her station in any weather. This may be asking too much of such
craft, and is certainly beyond their capabilities at present, but it is quite
possible that in time we shall see war airships and commercial airships
as distinct in design as men-of-war and merchant ships of today.
At present it certainly will not pay to run commercial airships capable
of ascending to heights of 15,000 or 20,000 feet. Commercial work will
doubtless be done at well under 10,000 feet.
Commercial airships will be able to select their routes according to sea-
sons and prevailing winds. The fact that they can shape course over the
land or over the sea gives them a far wider choice of routes, especially to
p. 2346 (#1310)
2346
(Dec.
U. S. Naval Institute Proceedings
the East, than a ship has; moreover, and this is a vital matter which I
think Admiral Henderson has overlooked, their high speed will enable them
to run rapidly out of the path of a local gale or storm.
As to the general endurance of airships, this has steadily improved, and
the Shenandoah and Los Angeles have already given proof that they are
not merely fair weather craft. In the war, airships were in their babyhood,
but even so, they were stouter infants than many people realize.
Airship Problems
Some Elementary Facts, Morning Post, 3 September, 1925.—To the Editor
of The Morning Post.-Sir:-The article of your Naval Correspondent
in your issue of the fifteenth ultimo deals much in generalities, which can-
not be replied to except by a simple exposition of elementary facts for
which I could not ask space.
No improvements of design or expenditure on research can alter the laws
under which airships have to exist, relating to the currents of the air, the
lifting power of lighter than air gases, which can easily be worked out by
referring to the tables giving the density of the air at various heights, the
danger from lightning, and at mooring masts from gales, which are in-
creased by increase of size; the difficulty of maintaining their trim while
moored, and their extreme vulnerability. No airship can be made to rise
to higher regions except by reducing her own weight, which can only be
done by valving gas, discharging fuel, cargo, or ballast which may have
been taken on board in substitution of either. The difficulties of manipula.
tion have been illustrated over and over again by the history of every air-
ship that has existed, and especially so by a critical examination of the per-
formances of the Shenandoah, R-34, and the Los Angeles, which you could
not give me space to collate from the available material.
Size does not overcome nature's laws, but merely accentuates the diffi-
culties; its great disability is decrease in handiness and security. There
will be great difficulty in mooring these monsters in strong winds, and in
gales they will not be able to remain at their mooring masts.
Your correspondent states that "their high speed will enable them to run
rapidly out of the path of a local gale or storm." In some cases possibly,
yes, but I take the following from the China Sea Pilot, Vol. III, which is
authoritative:
“The area covered by typhoons is very variable, some are quite small,
twenty to thirty miles across, while others extend over a region of hundreds
of miles in diameter. The mean diameter of the dangerous part-this it
must be remembered is wind to ships, but currents to aircraft-of a typhoon
may be taken as 100 to 200 miles. With increasing north latitude typhoons
tend to increase in size and diminish in intensity. The rate of progress of
the center of the typhoon varies from five to forty miles an hour, the speed
of the wind often reaches 26 to 31 m.p.h. at 500 miles from the center, in-
creasing to as much as 75 m.p.h. at thirty miles from the center."
The above is a correct description of all revolving storms.
Your correspondent quotes from an article in the current number of the
R.U.S.I. Journal. To be of any value the number of casualties and fatalities
should be shown as a percentage of the numbers of the personnel who flew
those miles, not of miles flown. A dispassionate examination of the work
done by these small craft would now show it was wasted effort.-Yours,
W. H. HENDERSON, Admiral (Retired)
September 2.
October 10, 1925
Thank you for inserting my short article on airships in your September
number. I sent you while I was away my correspondence in the Morning
p. 2347 (#1311)
1925]
2347
Professional Notes
Post on the same subject. I much regretted the loss of life entailed by the
loss of the Shenandoah, but so far as one can at present judge, her loss
supports all the conclusions which I have advanced against the practica-
bility of airships from a constructional, navigational, transport, and financial
point of view. They are fair weather craft, and their disposable lift, when
all stresses are provided for, will be exceedingly small.
I hear a small book is coming out before long which will give a history
of all the American and British airships built since 1918, and thoroughly
shows up their disabilities. If it is printed I will send you a copy. It is
just as well the public of both countries should know the facts concerning
them.
I see you have also reprinted an article from the Army, Navy and Air
Force Gazette, which in its concluding paragraph sums up opinions that
have been expressed by me over a good many years, and which are strongly
emphasized by existing conditions.
I see that one of my letters on the 2,000-ton cruisers was in The Times
of November 25, 1921.
I am enclosing a cutting from the Naval and Military Record of June 24
which gives some later views; but I think you must take in the Naval and
Military Record and will have seen, also, Sir Herbert Russell's articles
on the same subject. I enclose a cutting of one of them. Others were
"Problems of Economy," September 16, and “The New Battleships," Sep-
tember 23. I consider Sir Herbert Russell by far the most advanced and
liberal minded of our naval journalists.
Commenting on the launching of the Nelson, both the Times and the
Daily Telegraph stated that she and the Rodney would probably be the last
big ships ever built. Opinion against these unnecessary and costly monsters
-monstrosities really-is growing over here; and it only wants comprehen-
sion and united action with the United States to bring matters down to more
simple conditions and save the waste of enormous sums of money.
I am a strong advocate for simplicity generally, and of function, in par-
ticular. The complexity of a 35,000-tonner is such that every function with
which she is endowed impairs her fighting value as a gun armament vessel
which is her primary, and with its necessary concomitant, her only func-
tion. In the same way a cruiser is a gunship only, torpedoes are no use to
her for attempting to fight battleships or new cruisers. She requires guns
to fight her kind and to resist destroyer attacks, while the destroyer's
primary function is torpedoes for attack of battleships and cruisers, but
she also must have guns for fighting her own kind.
I deprecate an airplane's being carried by any fighting ship. The ship
cannot be made subservient to her planes, which she is; directly they go
off her, functions must not be interfered with, and a sporting chance must
be given to the crew of the planes for their lives.
You are, of course, quite at liberty to make use of any of my ideas.
Sincerely yours,
W. H. HENDERSON
Editor's NOTE.—See "Secretary's Notes” this issue; also pp. 2356-2359
this issue.
Capital Ship Problems
Admiral Sir W. H. Henderson's Views, The Naval and Military Record,
24 June, 1925.—To the Editor of The Naval and Military Record.—Sir:
In your issue of June 10 Sir Herbert Russell propounds and answers the
question, "Will the Battleship Pass?"
With his conclusion I have for long been in agreement, and stated in the
press during the Scott controversy that a 10,000-ton cruiser could perform
p. 2348 (#1312)
2348
(Dec.
U. S. Naval Institute Proceedings
all the functions of a battleship, provided there was an international agree-
ment that ships should not be built of greater size.
I can only hope to supplement the able reasoning by which Sir Herbert
has, I think, proved his query. I have always thought Admiral Sir Percy
Scott would have carried his case against the battleship had he only been
then able to take wider grounds. His conceptions did not go beyond the
dreadnoughts of 1914-18, built to compete with German dreadnoughts, all of
which were constructed for use in the narrow scas of Europe, with the con-
comitant weapons then brought into use.
He was naturally taken up by the advocates of the battleship, who saw
no further than he did, and who knew the naval architects said a duplica-
tion of size was possible, and that there were still available weights that
could be made use of protectively against the mine and torpedo. It was the
old battle of guns v. armor over again, and would have like results.
If it had not been for the Washington Conference we should have had
ships of 50,000 tons and over, for competition would have been open and
universal. The Conference at least limited size and the caliber of guns,
although even the signatories did not have their eyes opened to the new
strategical conditions which were the result of the war, or they would
still further have reduced the size and simplified the conditions of the agreed
capital ships.
The naval lesson of the war is that the construction and composition of
the fleets of 1914-18 was such that they could only be used in narrow
waters; that many bases of every kind were essential to them.
The powers of resistance of the new ships "have immensely increased,"
but this can only be for a period, until the powers of attack have developed
proportionately. Meanwhile, the strategic fields have shifted from the
narrow seas to the oceans, particularly the Pacific Ocean, where there are
no bases except at such distances as prohibit the use of fleets as now con-
stituted. Nothing can be altered so long as the Washington Treaty re-
mains in being. That is till 1936, and even were it abrogated before that,
and competition and rivalry reintroduced, it is impossible to conceive that
bases could be provided or maintained in sufficiency over its vast militarily
unproductive areas.
The corollary to this is that fleets must be constituted to fit the strategic
fields in which they may have to act. This, to take the question of the
battleship only, will need the elimination of the big ship, and necessitate
the use of smaller, simpler, and more mobile craft. The nation that first
takes the lead in building that of 17,500 tons for that of 35,000 tons, as it
is stated the French propose to do, will have the advantage. During the
Scott controversy I publicly stated that a 10,000-ton cruiser could perform
all the functions of a battleship, provided there was agreement that no na-
tion should have ships of greater size; it is a question of agreement only.
There is also another factor. Everything, whether it be organic or in-
oganic, and especially the productions of man, reach in their development
a point of maximum efficiency at which they become stabilized, or are super-
seded by new and more efficient forms, which eventually take their place.
There can be no question but that, judged by this standard, the 35,000-ton
battleship has long passed this point, and that in size, cost, and complexity
she is much too monstrous for the purposes for which she can be usefully
employed.
We have already begun with the 10,000-ton mobile cruiser, and I believe
we are on the verge of a reconstruction of all our ideas concerning the com-
position of fleets.
W. H. HENDERSON, Admiral (Retired)
p. 2349 (#1313)
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Professional Notes
2349
Smaller Fighting Ships
The Reaction from Colossal Displacement, by Sir Herbert Russell, The
Naval and Military Record, 5 August, 1925.—Broadly speaking, there are
at the present day two schools of opinion regarding the value of the capital
ship. There is the school which holds that she has outlived her utility,
and there is the school which believes that she still maintains her traditional
place in the general principles of sea war. But between this broad division
of thought there is a large body of indefinite opinion which, while unpre-
pared to express any conclusion as to the future of the capital ship, would
compromise with the question by greatly reducing her size.
The Washington Conference, of course, took a specific step in this direc-
tion. The original proposal was that no ship-of-the-line laid down sub-
sequently to the signing of the treaty should exceed 30,000 tons displace-
ment. The technical experts, wedded to the idea of progressive develop-
ment, resisted this limit, and the figure was increased to 35,000 tons. At
this time we had in commission the Hood, 41,200 tons; the United States
were building the Saratoga class of battle cruisers of 43,500 tons; and
Japan had in commission the Nagato, of 40,000 tons. But the Hood is un-
questionably the biggest warship ever yet designed or laid down.
The material school was rather dismayed by the Washington limitation:
it was already talking of the 55,000-ton battleship, and the famous Hadfield
firm had built and tested a 20-inch gun which, presumably, it was proposed
that she should mount. On the other hand, the tactical school, which is only
impressed by size and power to the degree in which these conform to sheer
utility, was disappointed with the Washington limitation in that reaction
was not carried nearly far enough. Agreed that the heaviest gun, the
stoutest armor, and the greatest speed should have the best chance of vic-
tory, there still remains Nelson's dictum that "numbers alone can annihilate."
Bigger ships must necessarily mean fewer ships, and the logical issue of
such a policy would ultimately be so few ships as to reduce war to a sort of
duel between champions.
The late Sir William White laid it down that there can be no finality in
warship design, and this is obviously true. But in every product of human
invention there is a point of maximum efficiency beyond which it is im-
possible to go, and at which evolution has to seek a new direction, or else
become stabilized, and consequently cease to be evolution. The sailing ship
reached this point, and was superseded by the steamship. The reciprocat-
ing engine reached this point, and was superseded by the turbine. The
cylindrical boiler reached this point, and was superseded by the water-tube
boiler. It would not be difficult to almost indefinitely extend the list, but
these examples illustrate the truth of this principle.
The tendency in warship design—or at any rate in capital ship design,
which we are now considering—is to develop complexity during progress
toward the maximum point of efficiency. I am not referring to complexity
of detail, which is inevitable to progress, but complexity of purpose. Pri-
marily, every type of warship has a definite offensive function, but the
modern aim seems to be in the direction of rendering her capable of various
performances. The weapon of the battleship is the gun. Why, then, fit her
with torpedo tubes ? Did the Great War produce any evidence that the
battleship could be used for torpedo attack? Simplicity in any given rôle
assuredly gives the highest efficiency of result, and to multiply that rôle by
imposing other purposes upon it is to reduce efficiency by diffusing it, so to
speak. Yet we shall find that the chief factor in the great growth of dis-
placement lies in this multiplication of purpose. The Hood carries the same
main armament as the Queen Elizabeth.. Why, then, should she be 13,000
tons bigger? Because it was decided to enable her to carry out the func-
tions of the cruiser as well as of the ship-of-the-line. If such a combination
p. 2350 (#1314)
2350
(Dec.
U. S. Naval Institute Proceedings
were practicable without involving the violation of other important prin-
ciples, the possible advantages of it would form their own justification. As
it is, we have to consider whether these possible advantages are worth the
price. In order to attempt to answer this let us consider the price.
The first point in this connection, by the natural association of ideas, is
economy. Here on the face of it the big ship appears to score. When
simplicity is departed from, and a great increase in capacity is demanded,
relative saving in cost is effected by size. To build and maintain a 40,000-
ton ship would be more economical than to build and maintain two 20,000-ton
ships, presuming the collective fighting value to be identical in both cases.
It is quite probable that the question of cost was a very prominent factor
in the general conditions of competition which forced the rapid growth in
displacement. But when we come to the heavy collateral expenditure upon
harbor accommodation, dry-docks, and the like involved in this policy, the
purely economic aspect begins to wear quite another aspect. To use a
homely metaphor, the fewer the number of baskets you use the less it will
cost you (for baskets) to distribute your eggs, but if you are presently
obliged to enlarge your shop window in order to display your baskets at
all the saving may easily vanish. The money that has been spent and still
remains to be spent, at Portsmouth, Devonport, and Malta simply as con-
sequence of the growth of battleship dimensions would probably absorb, and
possibly more than absorb, the saving effected by the constructive principle.
But while money is the chief sinew of war we cannot always reckon war
values in terms of money. So we have to consider the question as to
whether the big ship is worth her price in other aspects than the purely
economic one. Assuming that we can mount half the number of heavy
guns, employ armor of equal protective effectiveness, and attain an equal
speed in a ship of 20,000 tons, what is the advantage of the 40,000-ton ship?
She will be a better gun-platform; she can deliver heavier salvoes; and she
will possess a wider sea-keeping radius. It is a debatable point as to whether
these advantages are not rather more apparent than real. In weather con-
ditions under which a 20,000-ton battleship cannot make effective shooting
a vessel of double the displacement is not going to do very much better.
Given efficient fire control, two ships with six guns apiece shooting at an
enemy vessel should be able to do at least as much damage as one ship with
twelve guns, while the risk of suffering crippling damage is practically
halved. Since battleships are designed to operate at no great distance from
a base, and not for sea cruising purposes, the question of radius of action-
of course within reasonable limits-is really not of supreme importance.
To no other sea service is the question of numbers so important as it is
to the British Navy. It is true that battleships do not figure in our over-
seas distributions outside of European waters, but there are clear indica-
tions that they may do so at no very distant date. At any rate, Singapore
is being developed as a capital ship base. Therefore, the principle of con-
centrating the greatest degree of power in the fewest number of hulls is not
a wise one for the British Empire. Rivalry must always be a dominant in-
fluence in naval design. We could not afford to reduce the size of our
capital ships, if such reduction involved a corresponding loss of fighting
power, while other nations maintained the full permissible limit. But need
such a reduction necessarily involve anything approaching a corresponding
loss of fighting power? Need it, in fact, involve any appreciable loss at
all if we eliminate the element of complexity which is primarily responsible
for the rapid growth in tonnage, and stick to the definite function of the
definite type ?
Take, for example, the question of defense, which nowadays makes such
a heavy demand upon displacement. A great many naval men share in the
opinion of Admiral Sir Reginald Custance that the best defense is offense,
and that two more big guns would be worth very much more than their
p. 2351 (#1315)
1925]
2351
Professional Notes
weight in broadside protection. I believe that one result of overhead attack
and underwater attack will be a radical modification in the long-accepted
principles of armor distribution, and that, except for vital positions such
as magazines, armor will be gradually reduced to the proportions carried
by cruisers. No doubt the suggestion will be resisted, but the fact remains
that the want of armor did not prevent hard fighting during the war on the
part of the cruisers and destroyers. At least half the naval personnel is
expected to fight in vessels without any armor protection at all, and in the
case of the destroyers to fight principally against armored ships.
Reductions of the burden of armor may well prove a preliminary step
to reduction of displacement. If we arrive at international agreement to
limit the size of battleship guns, as has been done in the case of cruisers,
then we may see a reaction that will not only result in a very much smaller
capital ship, but a capital ship which will partake very much more of the
character of a big armored cruiser than of a battleship as we now under-
stand the term. It is quite conceivable that we may have reached such a
modification of constructive principles before the time arrives at which we
should resume the building of capital ships under the Washington agree-
ment. As far as it is possible to read the future, by that time we shall be
the only European power maintaining battleships at all. If the United States
and Japan continue to maintain a battle fleet, I suppose we shall have no
alternative. At the present time strategical considerations are centered in
the Pacific. Here the Washington limitations with regard to bases would
render it impracticable for the United States battle fleet to operate. Quite
a different type of ship is required for service in remote seas from that which
is designed fo narrow waters, and the 10,000-ton cruiser is a vessel which
I suggest represents perception of this fact. The bigger and more complex
a fleet, the greater the need for bases: during the last three years of the
Great War there was never a fighting unit from Scapa to Palestine operat-
ing more than 300 miles from a base.
The gigantic battleship appears to me to be of even less use to the United
States than to ourselves, for that country has to contemplate much greater
distances in her strategical outlook. Temporary bases are a poor com-
promise with the necessities of a modern fleet. America would be much
better served by a type of big ship especially adapted to ocean work. Prob-
ably she quite recognizes this herself, but finds a difficulty in consequence of
her rivalry with Japanese sea power. But as Japanese naval policy is de-
fensive, it would probably suit her very well to come into line with any
international proposal to limit displacement and gun power in her future
construction. It is certainly not improbable that the destiny of Japan may
bring her to war, but in this event she would wait to be attacked, and as
near to her own base as possible.
The tactical advantages of the smaller ship are, I believe, generally
realized. The primary cause of the result at Jutland was that, as in the
eighteenth century, we remained bound to the principle of the line-of-battle
formation. The Grand Fleet was too big for such a formation, which could
be (and actually was) rendered impotent by an unsuspected or disconcerting
maneuver. The lesson of Jutland is the necessity for greater flexibility
and more opportunity for initiative, and to this principle numbers certainly
contribute. Smaller ships imply greater numbers; they likewise mean a
“spreading out” of risk, with the result of encouraging a commander-in-
chief to follow the Nelsonian doctrine very much more effectively than was
attempted at Jutland.
The bigger weapon only calls forth the more formidable response. We
are now able to claim that the bulge makes the battleship reasonably safe
against torpedo attack. The answer will be a bigger and more devastating
torpedo. The danger of the mine is certainly not going to lessen-offense
never does. Development designed to counteract it means an unending
p. 2352 (#1316)
2352
(Dec.
U. S. Naval Institute Proceedings
process of growth in displacement. The inevitable result is the production
of a ship too costly, and representing too large a proportion of total fighting
power, to be lightly risked. She is stultified by virtue of her superlative
qualities, and spends most of her career in a boom-closed anchorage
FRANCE
The French Naval Renaissance
The Engineer, 16 October, 1925.—The naval power of France has been
very considerably augmented during the present year by the completion of
new vessels that were laid down in 1922 and 1923, under the first section oi
the postwar building program. Delay has occurred in almost every case,
owing in part to alterations in the original designs and in part to technical
difficulties, but the Ministry of Marine is hopeful that thirty new units
will be commissioned before next spring. The most important of these ves-
sels are three cruisers-Duguay-Trouin, Lamotte-Picquet, and Primauquet,
sister ships of 7,873 tons displacement, engined for a speed of 34 knots. The
design is frankly experimental, for it is nearly a generation since the last
high-speed cruiser was built in France and the present staff of the Section
Technique-corresponding to our Royal Corps of Naval Constructors-has
had no practical experience in this branch of construction. It is, therefore,
not surprising to learn that the preliminary steam trials of the Duguar-
Trouin have failed to give complete satisfaction. Full details are not yet
to hand, but it appears that the power developed by the turbine machinery
at given pressures did not result in the speed expected. Pending further
information, we shall ignore the unofficial reports which are current in
regard to this matter. It is not only in the French Navy that recent ships,
designed for extremely high speeds, have failed to justify expectation. We
observe that two American cruisers, which were acclaimed not long since as
the swiftest vessels of their class in the world, have just been withdrawn
from service to have their turbines "modified," a euphemism which appar-
ently implies radical changes in their propelling machinery. In Japan, also,
the 33-knot cruiser Kinu broke down badly on a recent trial, and engine-
room troubles have been not infrequent in others of her class. It says much
for the courage of French constructors that they undertook to build a
cruiser with a higher legend speed than that of any existing ship of this
type. The Duguay-Trouin, of 7,873 tons, has machinery of 100,000 shaft
horsepower, while H.M.S. Emerald, of 7,600 tons, is designed for 80.000
shaft horsepower. Bearing in mind the unequalled experience of British
naval constructors in the design of very fast ships, and the admitted pre-
eminence of our engineers in the construction of steam machinery for marine
purposes, the discrepancy between these figures is significant. At the same
time, it is but fair to add that the French ship, in contrast to the Emerald
is virtually destitute of armor, and, in effect, represents an extreme ten-
dency to sacrifice every other attribute to speed. The same principle ap-
pears to have inspired the design of two later and larger ships, Duquesne
and Tourville, which were laid down during the summer. They are to dis-
place 10,000 tons and to have machinery of 130,000 shaft horsepower. The
utmost speed attainable, combined with adequate gun power and little or
no protection, would appear to be the tactical policy which now governs
French naval construction. The armament of the Duguay-Trouin class
consists of eight 6.1-inch guns paired in splinter-proof turrets at bow and
stern. These guns are a high-velocity model, with a length of 55 calibers.
The weight of the projectile is unknown, but in range and precision the net
weapon is said to surpass the 7.6-inch gun mounted in older French cruisers.
Of equal interest are the torpedo craft which are now running their
trials. Six of them are flotilla leaders, unprecedented in size and power, all
of which were laid down in private yards in 1922-23. The Jaguar and her
p. 2353 (#1317)
1925)
2353
Professional Notes
five consorts are ships of 2,359 tons displacement, with a length of nearly
400 feet, a breadth of 36 feet, and machinery of 50,000 shaft horsepower for
a speed of 35.5 knots. Drawings which have been published show the lines
of the hull to be extremely fine, and this fact, taken in conjunction with the
heavy armament carried, lends a special interest to the behavior of these
vessels at sea. As first designed, they were to have had six 5.1-inch guns,
but it soon became evident from tank experiments that the weight of this
armament would seriously prejudice their stability, and one gun was accord-
ingly deleted. They also have two 75 mm. anti-aircraft guns and six 21.7-
inch torpedo tubes on triple mountings. Two different types of turbine-
Rateau and Breguet-are represented in this group of ships. There are
five small-tube boilers, burning oil, and sufficient fuel is carried for a voyage
of 2,500 miles at 18 knots. The Jaguar, which began her trials two months
ago, has developed condenser trouble, though it is said to be of a minor
nature. The Tiger, of the same class, attained a speed of 32 knots, with
only 26,000 shaft horsepower, and subsequently worked up to full power,
maintaining 35.5 knots with ease. Bad weather was encountered on this
trial. When running at full speed the bows of the ship tended to lift out of
the water unduly, but otherwise she behaved admirably, and showed herself
a better sea boat than had been anticipated. Good reports have also been
received of the initial trials of the Leopard and Chacal. The two remain-
ing vessels, Lynx and Panthère, have not yet reached the trial stage, but
will probably do so before the end of the year. It is proposed to form the
Jaguar, Tiger, Leopard, and Chacal into a division légère rapide, which,
after a three months' course of training, will make a cruise in northern
waters, calling at ports in Great Britain and Scandinavia. Fifteen more
flotilla leaders are included in the program, for completion by 1931, and
several of them have already been ordered. They will be slightly larger
than the Jaguars, and will carry 5.5-inch guns in place of 5.1-inch. The
British Navy has no torpedo craft comparable with the Jaguar, to say noth-
ing of the latest French design. Our largest flotilla leaders are lighter by
600 tons, and are armed with five 4.7-inch guns. On the other hand, they
are at least I knot faster. It is, however, very improbable that this new
development in foreign naval construction will be overlooked when the
methodical replacement of obsolete destroyers is begun, two years hence. In
addition to the flotilla leaders described above, twelve destroyers are being
completed for the French service. Laid down in 1923, they have a dis-
placement of 1,434 tons, engines of 30,000 shaft horsepower for a speed
of 33 knots, and are armed with four 5.1-inch guns and six tubes. Six other
boats of the same class are on the stocks, and fifteen more are projected.
They are simply a smaller edition of the Jaguar type, but a lower speed has
been accepted for the sake of a heavy armament. If the current building
program is adhered to, France will eventually possess fifty-seven torpedo
vessels of post-war design, all of large dimensions and high speed, armed
with 5.1-inch and 5.5-inch guns, and carrying torpedoes more powerful than
the standard model in our navy. She will have, besides, nine fast cruisers-
including six of 10,000 tons, mounting 8-inch guns—and more than one
hundred submarines, fifty-nine of which will be of the very latest con-
struction.
In view of this formidable array of light naval craft, which could be em-
ployed with telling effect in the narrow waters of the Mediterranean, French
naval strategists do not appear to be greatly concerned about the weakness
of their battle fleet. No attempt has been made to replace the Dreadnought
France, which was wrecked three years ago, nor apparently is there any
intention of doing so. The six remaining dreadnoughts have all been thor-
oughly renovated since the war, and even the three Dantons still on the
active list have been modernized to some extent, though their fighting value
is small. It would seem therefore that French naval opinion still cherishes
p. 2354 (#1318)
2354
(Dec.
U. S. Naval Institute Proceedings
a certain respect for the battleship, despite the almost supreme influence now
wielded by the Jeune Ecole, in whose philosophy of warfare the great ship
has no place. Yet it is exceedingly improbable that France will ever build
another battleship. For some months past the Ministry of Marine has had
under consideration the design of a croiseur de combat, which is highly
commended by distinguished naval critics. It is, in effect, a light battle
cruiser of 17,500 tons, capable of steaming at 34 knots. The armament of
eight 12-inch guns is disposed in two quadruple turrets, en échelon amid-
ships, thus commanding-in theory—an all-round field of fire. Vital parts
are protected by armor strong enough to resist all except the heaviest pro-
jectiles. Room is provided for eight aeroplanes, and the forecastle or the
quarterdeck is fitted with a flying-off platform. Under the Washington
Treaty, France is at liberty to utilize her allotment of capital ship tonnage
as she may consider advisable. No objection could be raised therefore if
she decided to build two of these 17,500-ton battle cruisers in lieu of one
35,000-ton battleship. Since they would, of course, completely overshadow
the 10,000-ton cruisers now building for all the major navies, their appear-
ance would introduce a novel and disturbing factor into calculations of
relative strength. For the present, however, the design remains in the paper
stage, from which it may never emerge. Ships of this type could hardly be
built for less than £4,500,000 apiece, and their value as a tactical or strategic
factor is entirely conjectural. Even without them, the revival of French
sea power is assured. When the building program now in hand has fully
matured, France will be in a position, if not absolutely to control the
Mediterranean, at least to deny the command of that sea to any rival fleet.
She may reckon with some confidence on her ability to safeguard the vital
lines of communication with northern Africa, which has become an indis-
pensable reservoir of manpower for her army, and the defense of her mari-
time frontiers will no longer cause her anxiety. A naval policy which
promises to yield such fruitful results cannot be adjudged extravagant or
unsound.
French Destroyer Trials
The Naval and Military Record, 23 September, 1925.—The destroyers
Tiger and Jaguar, of 2,400 tons, have both accomplished off Lorient highly
successful preliminary trials at 18, 20, and 32 knots, their Rateau turbines
developing more than the stipulated power and speed during their cruising
and two-third power tests. They are this week undergoing their final
official trials before hoisting the pennant for commission. Next month will
be the turn of the Leopard, completing at the Chantiers de la Loire (St.
Nazaire), which has already undergone successful stationary trials, her
Breguet turbines giving satisfaction. The Panthère (Lorient) is expected
to be ready at the end of October, the Chacal (Penhoet, St. Nazaire, that
has also Rateau turbines) is being pressed forward and ought to run her
trials next November. The Lynx, the last of the series, in hand at St.
Nazaire (Chantiers de la Loire), is only shipping her funnels and super-
structures, and is not likely to be ready before next year. She has on board
her Breguet turbines. It is to be noted that the six French super-destroyers
have only French turbines. This keen competition between French yards and
turbine makers lends additional interest to the forthcoming trials, which are
expected, besides, to demonstrate to the world that France possesses anew
the speed supremacy, the most important of all strategic assets.
Both French types of turbines, that are very different in shape, con-
ditions of working, and installation on board, have, of course, their respective
qualities, the Rateaus aiming at robustness and reliability and at simplicity
in the working and controlling, permitting easy supervision and repairing.
Up to the present, if anything, superiority has been on the side of the Rateau
p. 2355 (#1319)
1925]
2355
Professional Notes
type for speed, fuel consumption, and returns for the indicated power. In
these respects the 450-ton Voltigeur, for instance, that had Rateaus, excelled
her sister ships Tirailleur (Breguets) and Chasseur (Parsons). In the
850-ton series the Breguets gave good results in the Cimeterre and Dague,
but in the matter of speed and reliability they did not quite come up to the
Parsons turbined Boulier and Casque (that exceeded 35 knots in 1913), and
Mehl, that was reputed for her speed endurance.
The turbine fight will be keener still in the torpilleurs d'escadre series.
These so-called 1,500-ton torpedo boats, thus modestly nicknamed "cats”
on the official lists, are in reality small "tigers,” equal or superior to British
flotilla leaders in armament and all-round power for mischief. In the
Italian fleet boats of the same size and power are proclaimed to be esploratori
leggeri (light scouts). Parsons turbines have here the lion share, these
being fitted in the Simoun, Sirocco (Penhoet), Bourrasque (Dunkerque),
Cyclône, and Mistral (Normand), Tempête (Nantes), and Tornade (Bor-
deaux), while Ovage Ouragan (Caen) have Rateau turbines, and the
Tramontane (Bordeaux) has Zoelly. It will be a stiff and interesting fight,
all the more so as the Parsons turbines fitted in those overgrown torpilleurs
are partly of British make and partly of French make. The Simoun and
Siocco, for instance, though constructed by the same firm (Penhoet), have
the former French-made Parsons, and the latter English-made Parsons.
Trials alone can decide as to quality, but, curiously enough, it has been re-
marked that English-made turbines, though outwardly rougher and lacking
in polished finish, turn more smoothly and noiselessly than French-made
turbines. Appearance is nothing. “The proof of the pudding is in the
eating."
The nominal motorpower of the 1,500-ton class of torpilleurs d'escadre
is 30,000 h.p., supplied by three boilers giving 210 tons of steam per hour,
against 35,000 h.p. for the 1,600-ton British Abdiels, and 30,000 h.p. for the
1,350-ton Viscount series of English destroyers; but, although trials have
not yet commenced, higher figures are being confidently announced: namely,
34,000 h.p. in the case of the Rateau-turbined boats and 36,000 h.p. in the
case of a few Parsons vessels. Boiler trials have shown that one fifth more
power may in practice be obtained above contract stipulations; in truth,
there is nothing exaggerated in 36,000 h.p. for 1,500-ton boats. It is only
right to say that robustness, speed endurance, and fighting capabilities were
the points aimed at in the French torpilleurs.
French Light Cruisers and Flotilla Leaders
The Naval and Military Record, 30 September, 1925.—The Paris Com-
mission des Essais, under Rear-Admiral Pugliesi-Conti, has arrived at
Lorient for the purpose of passing through their official trials the 2,400-ton
destroyers Tiger, built at Chantiers de Bretagne-Nantes, and Jaguar, re-
cently completed by the Lorient arsenal. Both these fine vessels have
Rateau turbines, and their preliminary trials have been successful. They
have their armament on board and are fully ready, and their wide shields,
much more conspicuous than in British destroyers, heavy gun-mountings,
and relatively big guns give an impression of cruiser-like strength. Impor-
tance attaches to these first trials of a totally new type of torpedo vessel,
as the data collected in the course of the forthcoming program of exhaustive
tests may serve to modify the designs of the 2,650-ton boats just ordered
at Caen and at Lorient. Similarly, the data gained in the 1,455-ton Simoun
will be used in the case of the four 1,500-ton boats on the point of being
ordered.
These eighteen 2,400-ton and 1,500-ton boats, if their speed capabilities
should come up to expectations, will be a good fighting investment and go
some way toward restoring France to a position of supremacy in that im-
p. 2356 (#1320)
2356
(Dec.
U. S. Naval Institute Proceedings
portant class of flotilla units. No rival fleet, not even the British, com-
prises destroyers quite so powerful and fast at sea. Yet some divergence
of views prevails among Paris experts as to their relative merits; it is
agreed, especially among gunnery specialists, that a 1,500-ton Simoun,
carrying four 130-millimeter guns, shows for the money a superior return to
the 2,400-ton Chacal, that mounts five 130-millimeter weapons, and has the
same number (six) of 550-millimeter torpedoes (each weighing 1,600 kilos);
and it is contended it would have been wiser, for the same amount, to con-
struct three 1,500-ton units in lieu of two 2,400-tonners, especially as the
smaller vessels are, strange to note, rather superior to the larger ones in the
matter of habitability. The five boilers and Rateau turbines of the Chacal.
for instance, occupy forty meters longer space than the three boilers and
Parsons turbines of the Simoun, which means that the quarters reserved to
the crew in the last named vessel are longer by twenty meters, and this for
sixty men less than in the Chacal. The crew of the Simoun only includes
sixty-five ordinary seamen (matelots), but fifty quartier-maitres (petty
officers), twenty-four maîtres et second maitres, and seven officers. This
large number of warrant and petty officers, most of them long-service men,
provides the means to obviate, to a certain extent, the incredible instability
of crews that are perpetually being changed from one ship to another with-
out due consideration to the interests of efficiency.
What is the ideal destroyer gun? This question has not been settled by
the advent of the 130-millimeter gun, the tests of which have been successful
in the matter of range and accuracy, the power of the 5.5-inch gun (140-
millimeter) now in the service being exceeded, which means the new gun
would have a say at over 18,000 yards, all the more so as its shell with its
special caps has a weight of 80 pounds, with a good percentage of explosives
that renders it highly effective against lightly-built ships even at extreme