

I then attempted to fit-up the tailwheel assembly. The tailspring is attached to the fuselage at three bolt locations: one forward and two aft. The latter two connections through three pillow straps, sandwiching the tailspring, to welded bushings on the fuselage. Upon inspection, I observed that the distance between the center of the welded bushings is much less (1/8") than the distance between the center of the holes on each pillow strap. Therefore, the holes were misaligned between welded bushings and pillow straps and bolts would not go through. I contacted Rans and they confirmed this is a common problem. Apparently, during welding operations the bead will cool and draw the bushing inward, resulting in the above discrepancy.
I decided to oversize drill the holes in the pillow straps from 3/16" to 1/4" in order to get the bolts to fit.