I have a set of Yak-9 plans, but they're probably second or third generation copies, since my rib spacings on both the inside and outside wings are uneven/distorted. I don't know whether they're dimensioned metrically or in inches, which complicates reverse engineering further. Can either of you measure the root and and outboard rib spacings along each wing and clue me in on the intended spacings? I'd really appreciate it, and probably can get things somewhat in proportion from these measurements.
My other question was whether the plane is classic legal. The article appeared in the 2/71 issue, meaning that the plane was flown during the 1970 season, but was it designed or built before then? Dave Day used to see Mr. Quek periodically at meets, but I guess he came up empty handed on the dates. Does anyone have a clue about the design date. 'neat and very attractive classically proportioned plane!
Thanks, much, guys.
SK