Originally posted by navav2002
I have a YS 91 on my bipe and it is great...My bipe is wayyy to heavy also (my fault)...but the 91 does a very good job...I am going to put a YS 120 on there only because I have another use for the 91...If you built your plane light I would think the 91 would be a super set-up!!...not sure it would capable of hovering or not...I would say great vertical but it would eventually fall off I think...if mine were lighter I could tell you for sure...dang it...
Mine hovers great! I was originally going to put a YS1.20 in but when I was building the plane I saw Mike Cross flying his on the .91. After a couple harriers to a tail touch and back up again, I was sold! His was still a bit lighter than mine ended up but I can still knife edge loop and such.
The 1.20 would be a guaranteed vertical set up, the .91 is if you keep it light.