Finally new work. The flap torque tube was fabricated from 1" tubing with 7/8" tubing welded into each end to provide the bearing surface and locate the tube side to side. The three arms were welded to the torqe tube with the required 65 degrees between them. The centre arm is located to the left of centre so as not to interfere with the aileron control mechanism. Having learned the issue of binding on the rudder torque bars I decided to use the same approach of 16mm thick Delrin bearings for the flap torque tube. 0.071" 4130 sheet was welded to the inside of the fuselage diagonals that support the torque tube. As per the rudder, the right hand one was cut into a "U" shape to allow the torque tube to be removed once the bearing blocks are unbolted. There is no requirement for any centre support for the flap torque tube.This approach of using Delrin blocks for the flap torque tube mounts exactly mirrors the standard practice in the Vans RV range of aircraft.
