RE: Sig LT40 or GP PT40 for first build in ten years?
I built an LT-40 with my son a few years ago and it turned out to be a great all around airplane. We built it according to the plans and put a mild 65 2-stroke in it. A 40 2-stroke is too small for this plane. One guy in our club put in a 65 saito in his LT-40 and converted it to a tail dragger. After flying his, I think that was the best set up for this plane. Hope you enjoy the experience. Regards, NM