Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
Thread Tools
Old May 20, 2001, 03:39 PM
Al P is offline
Find More Posts by Al P
small electrics r BIG FUN

Does the specified C G change with heavier motor/batteries ?

Let's say a plane comes with the C G specified for a certain location, say, 2 inches from leading edge of the wing.

If I install a heavier motor and esc, I don't balance in a different spot, do I ? Don't we move the flight pack or something else to maintain balance in the factory location ?


Sign up now
to remove ads between posts
Old May 20, 2001, 04:59 PM
Doc Watson is offline
Find More Posts by Doc Watson
Registered User
Doc Watson's Avatar
Al P,

Balance the plane in the same place. A heavier model will just have a faster minimum speed (and higher structural stresses).

Old May 22, 2001, 11:06 AM
Megowcoupe is offline
Find More Posts by Megowcoupe
Balsa Flies Better!
Depends on the design and the amount of extra weight. For a standard clark y type airfoil and a flat plate stab + 20 % in weight or so, you're probably OK. For an undercambered wing with a lifting stab- move the c.g. forward as weight increases. It's often not a bad idea to sneak the c.g. forward a bit for first flights-and set a little extra up in the trims. Nose heavy airplanes get retrimmed, tail heavy airplanes get rekitted.

Sam Brauer
Norwalk, CT
Old May 22, 2001, 04:26 PM
Al P is offline
Find More Posts by Al P
small electrics r BIG FUN
Thanks for the replies.. I moved my flight pack forward 1/4 inch and it flies great now.


Old May 22, 2001, 05:25 PM
Mark Wood is offline
Find More Posts by Mark Wood
characters welcome!
Mark Wood's Avatar
The CG is an inherant part of the design that does not change. The balance however will change.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Hhhmm... C of G prob with Spirit and pod ThePitchedLink Sailplane Talk 2 Feb 14, 2005 12:04 PM
FS: SA G-Ride with AXI Motor - Both N.I.B. cadconversions Aircraft - Electric - Airplanes (FS/W) 31 Apr 11, 2004 12:44 AM
G-Ride with AXI motor RickC2009 Parkflyers 8 Feb 26, 2004 03:06 PM
S/C for hornet with CDR motor? Eddy Micro Helis 23 Jul 23, 2003 01:36 PM
C.G. Problems with Python RCFlybry High Performance 29 May 28, 2002 04:42 PM