Originally Posted by
olnico
Yes, all the control surface are built with hard wood blocks for the control horns. It is absolutely essential for a plane of that size that is reaching these speeds. The hinging torque for the ailerons for example is well over 600 oz.in at max speed with a pushrod force of 15 lbs.
Sorry to correct you Oli, but not on the Diamonds I have seen yet. Only wood in the trailing edges of the elastic flaps. In the area where the slot for the control horns is carved out, there is no hardwood inside. The control horn can only bond with top and bottom surface of the respective rudder / aileron etc. Judging from the photos in this thread likewise.
