Dual Copter

Overview

Another reincarnation of my propeller and frame system :) It fly quite efficiently.

Customization

If you want you can customize propeller and frame and adjust it as you want. Editable files are available in file tab. Experiment and have fun. 

Instruction

Assembly is the same as in origin Rubber Band Engine project. The main difference is that you have to bend two propeller like a relfection in a mirror.

Common problem

Sometimes propeller doesn't want to spin easily and something is block it. Common problem with this situation is “elephant foot” in engine frame https://help.prusa3d.com/article/elephant-foot-compensation_114487 . You have to simply cut foot with knife.

If propeller still doesn't work smooth you can always give a small drop of oil (for example silicon oil) to base of propeller and it will work better.

Have fun :)