Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Shoulder Wing Root Rocker
This rocker is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit, and you print two. The lever is 77 x 16 x 6 mm. It pivots on a shoulder post using an M4x16 screw and an M4 washer, through a 4.5 mm hole in a 16 mm boss that has a 0.5 mm raised thrust ring. The drive link attaches with an M3x16 screw and nyloc nut through a 3.4 mm hole 20 mm inboard. The wing root bolts to two M3 heat-set inserts (4.0 x 5 mm bores) at 30 and 45 mm outboard, which turns the slider's stroke into about ±37° of flap.
Flapper Wing Drive Link
This straight dog-bone link is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit, and you print two. It is 46 x 9 x 4.4 mm, with 3.4 mm M3 clearance holes 37.0 mm apart in 9 mm bosses on an 8 mm wide, 4.0 mm stack. The lower end takes an M3x10 into the slider's heat-set insert. The upper end takes an M3x16 with a nyloc through the rocker. Each end has a 6.5 mm, 0.4 mm tall washer ring on opposite faces, so only the rings rub against the slider and the rocker. The whole stack is 4.4 mm and fits the 4.5 mm gap between them.