Push Rod Size?
Is there a deciding factor when going from 2-56 rod to ,4-40 rod.? Some of the Arf's I have are 40-60 size and some are91 and up to giant scale.Some of the larger aircraft come with 4-40 and some with 2-56? Commen sense tells me to use 4-40 on planes with WS of over 60 IN..
Stress,speed and design of the plane seem to me, the deciding factor.Is a general rule on this?. I would like your input.