ORIGINAL: Cyberwolf (snipped)
The 115 Saito may be smaller and lighter than a YS, but it is no way stronger or as strong, even the horizon webpage says its bench marked prop was a 15x8 @ 8800 RPM's Ok so I run a 16x8 APC on my old 120 SF's and NC at 93-9500 a full inch longer at 800 RPM's more on 15% fuel. My 120SC which is in my GB Extra will turn that prop at over 10 K if I let it.
The 110 YS will swing a 16x6 APC at about the same RPM's i'm getting and is a much lighter engine. I'm not saying a saito isnt a good engine I have some myself, but there nowhere as powerfull as a YS is.
I used 2 servos in the fuse for the elevators not in the tail which worked out good. My total weight is about 8 1/2 - 9 Lbs with the stock pull pull and a 120 YS under the hood twin aileron servos , glass cowling and pants. The plane fies very light at this weight and floats coming in for a landing. I think that large prop may have alot to do with that. The 120 SC willtake it straight up out of sight at a little over half throttle.
I didn't mean to put down YS, they are great engines. If the 120 SC will "take it straight up out of sight at a little over half throttle" I would suggest that for most pilots that is a little overpowered. Mine was originally powered with an OS 1.08 and that I felt was not only overpowered but heavy. When I went to the Saito 100 I pulled a pound out of it and ended up around 9-9 1/2 lbs. It still floats in for a landing! The Saito 100 is enough power for me as it will do three vertical rolls before petering out but I would suggest that a Saito 115 in a light airframe would be a desirable combination. Or a YS 110, whatever floats your boat.
I have two more kits and the next one will be built as light as I can get it still using the FG cowl and aluminum gear. (I have FG gear on the present one).
Cyberwolf keep up the good work and keep us posted. You're doing a great job and we are watching you [8D]