What are your thoughts about having the throttle servo under the cowl, on the firewall, for the throttle on a gas motor. (G38)</p>

Pat</p>

If it fits and the linkage works then go for it. I have no problems doing it at all like that. Some engines can be a huge pain trying to get the throttle linkage all worked out OK. But unlike glow engines the gasoline engines tend to be fairly clean burning so there isn't a mess of oil residue to have to deal with after flying a gasser plane for the day. Thus the servo isn't getting all oiled up from the exhaust residue.

I set my throttle servos up like that all the time. One thing that I do for peace of mind is to wrap the servo in heat reflective tape.

I usually mount it up front like that for side carb engines, makes for very simple linkages. For rear mounted carbs, it's sometimes more trouble than its worth, so I mount the throttle servo in the fuse, in the "usual" place for a throttle servo.

Thanks,
That is the way I set up one of my planes, but have not flown it yet, and I'm setting up this plane the same way. I just thought I would get a couple thoughts on what others think of it.

Pat

Six of one, half dozen of another.

Have seen some with firewall mounted servo's, but most with fuselage mounted servos'

Usually mount mine in the most convenient location. But also I am always taking into account how I expect the model to balance out.