concept because of its compactness, wall thickness may need adjustment.
7.5 " around 1.6 mm wall thickness on the main body. drill own motor holes in 30mm top pad. Use hotglue to place servo's and flaps, for the flaps use flat plastic sheets.
I can make nice rounded ones later after initial tests. Stabalizer fins will need to be added, servos can be used to compensate during flight though probably not required according to other videos.
if a parachute is used on larger versions the bottom shell will also act as another parachute.
30mm motor pad to start with.
the top ring could probably be lighter. use hotglue to attach
advantage is single engine
https://www.youtube.com/watch?v=KXVtUCABiv8 here is a working version.