This Unity project is designed to simulate and validate the mechanics of precision airdrops, combining airplane control, parachute physics, and dynamic visual feedback. The goal is to create a realistic and interactive system where the accuracy of box drops into a target zone is influenced by multiple factors, such as:
- Aircraft speed (affects forward push and dispersion).
- Drop height (affects drift and parachute opening time).
- Wind dynamics (affects drift distance and drop accuracy).
parachute-simulation.mp4
Note
This simulation was created based on equations and data collected from the Colombian National Army Jumpmaster Manual.
- The airplane follows a circular trajectory above the ground.
- Users can adjust:
- Speed: Adjust rotational velocity using a slider.
- Height: Modify the airplane's altitude using a slider.
- Deploy boxes by pressing the space key when the airplane passes over the drop zone.
- Each box:
- Opens its parachute at a randomized height.
- Displays wind deviation and descent information during the drop.
- Real-time updates:
- Dispersion: Distance between boxes dropped consecutively.
- Front Push: Impact of airplane speed on box trajectory.
- Landing feedback includes:
- Green laser: Indicates when the airplane is above the target zone.
- Box color changes:
- Green: Landed in the target area.
- Red: Missed the target area.
- Display live updates on:
- Airplane speed and height.
- Dispersion between dropped boxes.
- Calculated front push distance based on airplane speed.
- UI elements dynamically position themselves for an intuitive 3D view.
| Drift Constant (K) | Parachute Type |
|---|---|
| 1.5 | Cargo or heavy equipment parachute |
| 3.0 | Personnel parachute |
| Aircraft Speed (Knots) | Minimum Time to Open (s) | Average Time to Open (s) | Maximum Time to Open (s) |
|---|---|---|---|
| 60 | 5.30 | 5.97 | 6.50 |
| 70 | 4.53 | 5.15 | 5.87 |
| 90 | 3.95 | 4.57 | 5.29 |
| 100 | 3.68 | 4.30 | 5.02 |
| 110 | 3.18 | 3.80 | 4.52 |
| 120 | 2.90 | 3.50 | 4.10 |
| 130 | 2.80 | 3.30 | 3.90 |
| 140 | 2.30 | 3.20 | 4.10 |
| 150 | 2.30 | 2.90 | 3.70 |
Equation:
Explanation:
- (D): Length of the drop zone.
- (R): Speed of the aircraft.
- (T): Time required to drop the cargo.
Application: This equation calculates the length of the drop zone required for deploying a specific number of parachutists or boxes with minimal dispersion. Dispersion represents the lateral displacement of parachutists after the parachute opens.
Equation:
Explanation:
- (D): Drift distance of the parachute.
- (K): Constant representing drift characteristics of a specific parachute type (Parachute Drift Constant).
- (A): Drop height.
- (V): Wind speed.
Application: This equation calculates the parachute's drift due to wind. Drift is the horizontal displacement between the imaginary and actual impact points.
Equation:
Explanation:
- (E): Front push distance.
- (V): Aircraft launch speed.
- (T): Time for the parachute to open (Parachute Opening Time).
Application: This equation calculates the front push experienced by the parachutist during the fall. Front push is the force acting in the direction opposite to the wind.
This project is licensed under the MIT License.