Propeller and shaft for rubber

 23 September 2021

Ideas for material of the propeller, shaft and bearing for small rubber models:

• malleable wire from a small paperclip for shaft, shaft bearing,
• plastic tubes from cotton buds or ball point pen for propeller hub, shaft bearing
• balsa for propeller hub and blades,
• other wood (bamboo, bass, chopstick) for propeller hub,
• cardboard for paddle blades,
• foam or plastic cup for propeller blades,
• ??

I think it is ok if the propeller hub is strong and heavy, plenty of hits and noseweight usually needed anyway. A malleable shaft means it will be easier to adjust it straight again, spring steel is too difficult to make and to correct. A jig is needed to check symmetry, for sanding angle flats and gluing blades. 

No such problems if capacitor powered.