I just mounted these two rails in a 40 size plane so that i can fit 3 servos across,Rudder,Elelvator and Air retract servo,does this look like a good plan,will it be sturdy enough?

That will do it, looks fine to me.

I'm assuming the picture shows the plane upside down, if so, it wouldn't be bad idea to glue some tri stock to the top of the rails. Remember the servos will be pushing weight towards the bottom of the aircraft in certain maneuvers and on landings.

Just my thoughts.


Tom