Props for electric vs props for gas..

[zeta30]

What's the difference between props for electric motors and props for gas?

I've noticed warnings on a lot of props that they are not to be used for gas motors.

Can you use a gas prop on an electric motor?

[flydiver]

Sure, but gas props tend to be "thicker" and have more mass. They are built for the heavier rigors of gas engines. They don't accelerate as well. Thinner electric props accelerate better.

Slow fly props have more surface area. They should only be used on low KV direct drive motors or geared. They tend to be flexible and definitely have an RPM limit. If it starts to get really "buzzy" or sound weird at WOT you may be pushing the envelope. They have more thrust at the expense of efficiency.

Direct drive props (like APEe GWS HD) will be thinner, stiffer, and generally have a larger/stronger hub. They will have less thrust (grunt, low pull), but rev better and handle higher RPM's.

Which you choose depends on the motor package and application. FWIW the stock Cub prop is a Slow fly. It's a 3:1 geared motor.

fly

[mrmugen]

I have used wood props on some of my outrunners but thats it. Flydiver summed it up pretty good right there.