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Pappy · 11-03-2007, 05:25 PM

I set the CG 1/2" aft (5 5/8") and it flew great. Needs virtually zero down elevator inverted and I'm pretty happy with that for now. I'm going to try adding 2oz. to the nose to move a lttle more forward, then move it a little more aft just to explore the range.

As for power, the B46 is awesome rich and unbroken-in. I can't wait to see how it evolved as I gradually lean it out and it breaks in. In this state, it turn a Xoar 21-8 at 6750 and idles steady at 1350. Half throttle yields a brisk takeoff and application of full power after lift-off yields a Space-Shuttle climb rate.

Definately correct about the gear mounts - very weak. I added 1/4" birch 5-ply gussets which passed their stength tests: 'Landing' on an imaginary runway...

...that was four feet higher than the real runway. SMASH! Gear flexed almost all the way to the wing panels but didn't affect the gear mounts at all.

11-03-2007, 05:25 PM	#5
Pappy Bad-ass Super Contributer! Join Date: Nov 2006 Location: Indianapolis, IN Age: 47 Posts: 464	Re: Great Planes 25% Yak CG Help I set the CG 1/2" aft (5 5/8") and it flew great. Needs virtually zero down elevator inverted and I'm pretty happy with that for now. I'm going to try adding 2oz. to the nose to move a lttle more forward, then move it a little more aft just to explore the range. As for power, the B46 is awesome rich and unbroken-in. I can't wait to see how it evolved as I gradually lean it out and it breaks in. In this state, it turn a Xoar 21-8 at 6750 and idles steady at 1350. Half throttle yields a brisk takeoff and application of full power after lift-off yields a Space-Shuttle climb rate. Definately correct about the gear mounts - very weak. I added 1/4" birch 5-ply gussets which passed their stength tests: 'Landing' on an imaginary runway... ...that was four feet higher than the real runway. SMASH! Gear flexed almost all the way to the wing panels but didn't affect the gear mounts at all. Attached Thumbnails 347.2 KB · Views: 38 __________________ *Pappy a.k.a. "Deadman"* *"Honey! I think Al's dead!" - April* EXTREMEFLIGHT R/C Fan! Last edited by Pappy; 11-03-2007 at 05:32 PM.