 FK9 PCS v3.6 Paraplegic Rudder Assembly |
Short description: The pedals are linked to the PCS stick by means of a very strong and extremely stiff massif torsion bar. This bar is driving the rudder pedals through pushrods linked at the torsion (swivelling) arm at the end of the torsion bar. The stick has a length of 300mm which results in a nominal needed force of 7kg to be implied on the stick to obtain full deflection of the rudder pedals when the aircraft is PARKED in a muddy underground. NOTE: this is the WORST case! Once the airplane is taxiing this needed force is reduced to a MUCH lower level. (Anyone who once has learned to taxi knows that you better make the plane move slowly BEFORE you start "stretching" the nose wheel. :-) The torsion bar can resist a momentum of up to 70Nm. This corresponds to a an implied force of 350kgf onto the stick. I don't know anyone that can pull or push 350kg with one arm. :-) The torsion bar is only twisted about 0,02° at nominal load. Elastic deformation is hold to a strict minimum to obtain a stiff and very responsive assembly. |