Morning RR.....was this a military derivative?
I ask as the only variant I can find where only 2 were produced was the YL-21. I've found a photo of 1 of the 2, and that just looks like a normal PA-18/L-21. Is it the other one (s/n 51-6496) that was perhaps modified?
Last edited by skytrain10; 14th Jul 2010 at 08:38.