ORIGINAL: Carey Shurley
You want to see some see some ??
no I'll accept your posting it as fact
think you're missing my point though.
your concern is that the carb body or shaft will eventually wear.
It will take a long time for that to wear enough to matter and when it does I'll just replace the shaft or the whole carb, they cost $35, I don't care
If however the throttle shuts unexpectedly and crashes the helicopter it will cost hundreds of dollars to repair.
keep in mind its possible for a servo to fail on its first flight.
It is not the wear you should be concerned about, but the constant hammering of the throttle valve against the sides of the carb bore does two things:
1) it hammers small flats at the valve sides, so the valve leaks air where it should not.
2) The hammering of the plate against the valve shaft bore will cause deformation of the bore, and binding of the shaft, which is not what you want.
If the spring has to go for one reason or another, the valve shaft should have some form positive stop on both sides of the carb body, without any slop. That way the carb will be in good shape for many flights to come.