Update for aerosled prototype:
- air drag force can be applied at arbitrary position. Helps to imitate higher air drag at engine radiator plate than at the root of the streamlined main body
- separation of airdrag helped to stabilize chassis from kneeling forward due to the thrust from propeller not being alligned with the center of mass
- now there are two airdrag components, each effecting only the part of the vehicle
- much smaller and more realistic thrust from propeller
- suspension at the back has much higher stiffness than in the front as it needs to support most of the weight