Hello,
I show you my pneumatic launcher for my skywalker X8.
Why a pneumatic launcher ? Because I think it's a funniest idea than a bungee launcher et technically more interesting.
It's works like the mini uav launcher system.
Air tank -> QEV -> air cylinder -> pulley -> trolley -> airplane
A 12V pump pressure the air tank with a lipo battery in few minutes.
The launch thanks to a pedal which start QEV.
All part are homemade with my mill machine
Cédric Siou