ORIGINAL: crankpin
Bob - Where are you at with the CG ? I am using 3421SA's on the elevator half's, 9411SA's on aileron's, and a Hi-Tec big torque, (plane out in shop now), on the rudder, DS821 on throttle. Using an SR Nicad 2250 mah 6V, just for insurance for rx battery pack. Mounted right below Tettra tank, not dead on center but I can shift. My thinking a little nose down when balancing for maiden flight. Maynard, this YS does shake a little on idle, smoothing out increased RPM. I guess the Hyde mount will make it shake more.
I am still messing with it, have it down to around 2500 on idle right now, using 20% CP Pro-Pattern. Started with 30% heli, too much smoke.
Vince
The recommended CG is 6-1/2" but that is a little conservative, as is usual for an initial set-up. Mine is at 6-5/8" now, and I will probably move it back a tad more, to 6-3/4 or 6-7/8. Not bad now, but a bit less push on elevator when inverted would be perfect. I'm using a 1200-mah Sanyo 5-cell NiCd, right behind the firewall, but because of the CG situation mentioned above it will probably end up somewhere near the wing tube.
I ran 2 gallons of 30% heli through mine, and now mix 30% heli (23% syn oil) with 10% Cool Power (18% syn oil) to end up with an almost perfect 20/20 blend. The engine really likes this, although I have read and heard that guys sometimes switch to 30% heli in hot, humid weather because it runs cooler. Idle, mid-range, top end and transition are all fantastic. Easy to see why the serious pattern gurus like them.