This aircraft won’t be flying to 100,000 feet. As I denote in the video, it’tl only fly to 18,000 feet and finalize our software/autopilot setup. We still have a lot of real world temperature (throwing insulated fuselage into a chest freezer) and HILSIM testing to do before thinking of a 100,000 foot launch.
Thanks for watching
to answer your questions though:
Temperature issues going to be tackled in one go. I haven’t yet researched and tested the negatives of removing the grease, so I don’t have an answer for that, but I’m planning on having a thermostat keeping the insulated fuselage at a toasty temperature. This could include having the servos inside the fuselage as well.
The flex of the aircraft is completely normal. It’s seen a lot of crashes and nose dives from 80 feet, the fact that its even flying and still conducting tests for me is great. The finalized aircraft will most likely not even pilot itself from 100,000 feet to around 40,000 feet due to the thin air. It really ramps up after 30,000 feet, but again, this will all be decided after HILSim testing, and launch simulations.
The whole aircraft will most likely either be optimized or completely redesigned for gliding as well - it was initially designed as a powered aircraft to fly in slower speeds and to have very forgiving stall characteristics. I’m using it in controls validation because of how forgiving it is when it comes to CG and how comfortable I am with it.
Also! CubePilot’s Here2 GPS uses the m8n engine, datasheet tells me it works up at 50KM altitudes. Which I’m very happy with considering our final goal is 30km.