Caliber90,
Don't know whether you have a choice of which engine to put in your XS. I was originally going to put a P-120 in mine but I listened to all the folks who said the P-120 would be too much engine for that airframe. A fellow jet pilot strongly suggested the Kingtech K-85 which is what I put in mine and it has all the power it needs and then some! Smaller, lighter engine, smaller fuel tank, fuel tank exactly over the CG, smaller tailpipe, ....... all add up to a significantly lighter airframe. Lighter flies better, lands slower, just sayin'.
Last edited by Steve Collins; 05-22-2019 at 07:43 PM.