RE: YS 63 Lost my Muffler is it OK to fly on my Sledge?
they will run ok without muffler. my flying buddy has an 80" omp w/ 140 that the back half fell off also; it just sounds better. If you ever get a chance, stop by our field in lakeland and fly; several 3d guys here now. you fly at t.r.a.c. or the field off 54?