vmsguy

The topic asks it all..

I know why right thrust is called for. And it makes sense for glow/gas motors that spin big and/or heavy wooden props at high rpm.

But I wonder, with the advent of plastic props and the smooth power delivery of brushless motors.. especially on smaller planes (smaller motors) is right thrust really needed? There isn't as much mass there.

I'm just curious...

exeter_acres

My Feedback: (2)

depends on the plane.....

but yes.


P-Factor, etc. etc. don't care where the power comes from

Bundubasher

Yaw is not caused by the weight of the prop, but more so because of the result of the amount of thrust (air massit displaces at a slightangle backwards over to the starboard side) from the blade. Tie a piece of long wool (i.e. 150 cm) to the top middle of the cowl and run the motor, notice the direction of the lengthof wool. It will tell you if you need side thrust.
It is more noticeable on larger planes but the concept is still the same. Some plane designs are less affected though.

Cheers

Bundu