ORIGINAL: Volfy
ORIGINAL: webeflyin
I have a Saito 82a (currently on my Twist) and an OS .61FX. I think I'll put the OS on the Twist and use the Saito on the Kadet!
Either engine will have more than enough power, but I would put the .61FX on the Kadet Sr. You will have an easier time balancing the plane with the heavier 2stroke engine. I have a Saito 82 as well and it is a lightweight power house. It is precisely designed to overpower .40 ships like your Twist.
That's a fair point ... I needed my ASP 61 four stroke + 10.5 oz of lead up front to balance out my Kadet Senior ... part of that may have been due to the tail wheel servo (and tail wheel assembly) I installed in the tail. I went with a micro servo hoping that it wouldn't affect balance too much, but I suppose if these have a tendency to come out tail heavy anyway, any thing extra back there will need to be compensated for in 3x the weight in lead up front.
On the other hand, I still stand by my statement that you don't want to over power/over speed the Kadet too much. The airframe starts to "sing" at about 30-35 mph. You can really hear it in a steep dive if you cut the throttle. Level flight you are probably going to be fine, but if you have a big engine I'd suggest that you avoid full power dives and high "G" pull outs.
Regards,
Curt.