Today was a very cold (-10°C / 14F) and very exciting day. We verified that the D5 prototype has enough static thrust to overcome the snow friction and perform belly takeoff. Yesterday we measured the friction force by filling the fuselage with sand bags toRead more

Today we tested several times the parachute recovery of the new UAV D3 prototype. In the past, the parachute often got stuck in the hatch. However, the new improved design works better. Now we let the gravitation do all the work and pull out theRead more