Easystern,

Here are a few pics I took of the new retract mounts I designed for my TT RB. The ribs were produced using tracings of the original ribs. I widened the retract mount fore/aft and designed the ribs to capture the retract mounting plate which prevents it from shearing out when landing on grass fields.

The pencil lines in the picture of the retract / wheelwell area are the original locations of the factory 1/8" lite ply ribs. The new retract mounting plate was expoxied into the wing with a long setting epoxy mixed with BVM Mill Fiber. The new ribs are simply butt glued the the spar shear webbing, the leading edge, and the upper wing skin. I used my finger to make a nice clean fillet of the epoxy/millfiber mix around all the joints.

My club field is grass and the new mounts have held up to one rollout into the rough stuff and two subsequent landings afterwards proved the structural integrity of the design.

I'll post the downthrust and right thrust numbers when I get a chance to measure them.

Rich






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