I appreciate the advise. If need be, I have a Thor 45 I can bolt on the nose if the G-26 can't muster enough thrust. But this is my theory behind the G-26. I have seen a 1/4 scale Spacewalker fly well on an old G-23. I would guess the plane weighed about 15 lbs. I have had two 89" PT-19's that flew "scale", one with a G-23, one with a G-26. They both weighed about 18 lbs. I watched a 80"+ Super Chipmunk at a flyin last year perform nicely with a G-26. I have no idea of the weight. I understand that this doesn't neccessarily mean the 26 will work in the Cap, but this is why I thought it'd be worth a try.