Multiplex Funjet front propeller drive conversion

thingiverse

The Multiplex MPX Funjet 1 is a nice, fast and very robust jet like RC-plane. Standard configuration is a back side pusher prop. But I didn't liked the crying sound of my pusher configuration. So after a serious crash, which distroyed the complete front of my funjet, I thought about to convert this thing to a front driven plane. Now, as a proud owner of a new Ender 3 V2 3d printer, I used fusion 360 to create my first own 3D construction to realize my idea. Quite ugly but working :-) Result: It is working great! Fast, easy to fly and quite silent. Please be very precise with center of gravity! original COG (85mm) is perfect, when you place an 3S 2200 accu close to the end of the funjet fuselage. But if you move COG only 5mm backwarts, the Funjet will be totally out of control. With the right COG it will fly very comfortable and stable - slow or fast as you like. The extra wheight of 100g is no problem with my motor configuration. Drive recommendation: Brushless 3542 1100/V motor, Prop: 11x7 folding Spinner: 45mm diameter Wheight of the nose: ~ 100g Print recommendation: I designed the nose as thin layer double wall construction, that will need some infill strings. I hope this will give some good wheigt to robustness ratio. I am using hot glue to fix the printed part to the Funjet Foam. Please be aware, that you will use this thing on your own risk! Please remember: Safety first with RC-airplanes, down fly with damaged parts!!!