Elevator bellcrank

The bushes are bonded into the fin skins in a position that allows the bellcrank to be as far aft as possible. The limiting factor is contact between the rear face of the bellcrank and the forward face of the rear fin spar. This allows the mass balance arm free movement without fouling the fin skins. Once the position is detemined the cut line for the elevator can be established. Drill a small hole through the fin skins and run a gut line through it from tip to tip of the stab. This ensures a straight cut line. The elevator width should be 210mm at the root (+/-5mm tolerance). Accurately fit bushes such that their axis is in line with that of the elevator piano hinge pin (NB). Bond bushes to fin skins. (At this stage only the right fin skin is attached and the left is held in position with screws).

More details available at http://whisperaircraft.blogspot.com/2009/03/horizontal-stab-fairings.html