So hey guys, I want to run this past you all. I run 9 gram servos in all my foam builds. I've run 4 gram servos just as a way to conserve weight in smaller craft.

The question I have is, Is it really necessary to run a servos larger than 9 grams for a control surface like an aileron or elevator or even throttle on a gasser when those surfaces will never have any appreciable pressure on them? Like is there any evidence to support a 9 gram servo on a .60 powered aircraft being incapable of successfully running the elevator or ailerons? I understand larger might be necessary for rudder/nose gear combos.. or rudder attached wheels on larger planes because you're dealing with gravity and surface contact at that point.

I'm just not sure they're absolutely required. At 60 miles an hour I have a feeling a 9 gram servo has more than enough power to move and hold an 8 square inch control surface in place, because there's just not that much stress on those control surfaces, especially since my mighty mini flying wing with an elevon setup does about 50, and the control surfaces are maybe 15 square inches of surface area each.


BTW, all my 9 gram servos are either EMAX or the kind you get off amazon at $2.00 a piece. They haven't failed me yet.. I have a fishing tackle box filled with all these small parts. Looking forward to my next build.