FlyingGiants - View Single Post

Pappy · 10-18-2007, 11:24 PM

I have the subject plane with:

Brillelli 46 (stock mount and muffler), stock spinner, Xoar 21x8
CH Ignition, Brillelli 1-cell Lipo Ign. pack, JR821 throttle servo, and Fromeco 2600 mAh radio pack mounted to the engine box
3 JR 8611a's in the tail
Fromeco regulator between the langing gear

With all this and the motor mounted at the max forward recommended position, the airplane balances almost an inch aft of the recommended spot. Even moving the rudder servo to the internal rail (pull-pull), I need to add over 9 ounches to get it to balance per the manual. I've read here and there that the CG as published (5 1/8" ) is too far forward.

Those of you that have flown the plane, where do you have it set? I intend to use it primarily as an IMAC training platform but would like to try my hand at 3D.

Though I've built and flown more than 30 airplanes over the last 25+ years, this is my first gasser and first fully 3D capable airplane so I'm not as prone to just go fly it and see what happens.

Thanks.

10-18-2007, 11:24 PM	#1
Pappy Bad-ass Super Contributer! Join Date: Nov 2006 Location: Indianapolis, IN Age: 47 Posts: 464	Great Planes 25% Yak CG Help I have the subject plane with: Brillelli 46 (stock mount and muffler), stock spinner, Xoar 21x8 CH Ignition, Brillelli 1-cell Lipo Ign. pack, JR821 throttle servo, and Fromeco 2600 mAh radio pack mounted to the engine box 3 JR 8611a's in the tail Fromeco regulator between the langing gear With all this and the motor mounted at the max forward recommended position, the airplane balances almost an inch aft of the recommended spot. Even moving the rudder servo to the internal rail (pull-pull), I need to add over 9 ounches to get it to balance per the manual. I've read here and there that the CG as published (5 1/8" ) is too far forward. Those of you that have flown the plane, where do you have it set? I intend to use it primarily as an IMAC training platform but would like to try my hand at 3D. Though I've built and flown more than 30 airplanes over the last 25+ years, this is my first gasser and first fully 3D capable airplane so I'm not as prone to just go fly it and see what happens. Thanks. __________________ *Pappy a.k.a. "Deadman"* *"Honey! I think Al's dead!" - April* EXTREMEFLIGHT R/C Fan!