I have just delete this model uploaded by me three days before and updated to this version
First, push vtol forwad to pitch the angle of the catapult,
Then, push throotle to the most,
Then, press button 1 to fly!
You maybe have noticed that cockpit is on the base, not on the aircraft, at first, I want to design a plane as simple, light as possible, so, let the cockpit, engine, air inlet, etc, away onto the base, while another result that maybe helpful to you is, you could disassemble my model and attach this simple plane and catapult to your large model, such as air carrier, castle, or others, so that your airbase could be protect by this model, I think.
Another question of me is, how could you help me on improving this catapult?