HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 12, 2010, 09:02 AM
Registered User
Joined Feb 2009
47 Posts
Discussion
Center of gravity

once the enter of gravity is found, what do you use to balance the plane?
39mikek is offline Find More Posts by 39mikek
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 12, 2010, 10:17 AM
Registered User
Larry Dudeck's Avatar
Williamsville, NY, USA
Joined Sep 2000
4,458 Posts
The balance point, or neutral point (NP), should be shown on the plans of your plane. This point is a function of wing areas, mean aerodynamic chords and tail moment. It is not a function of weight.

The plane's center of gravity is a function of weight distribution. It is adjusted so the CoG is forward of the NP. The distance between the CoG and the NP is the static margin. More static margin equals more stability but less pitch control. Too much static margin will result in a situation where the elevator does not have enough authority to keep the plane in level flight. Smaller amounts of static margin result in a less stable plane that is very responsive to pitch changes. Moving the CoG aft of the balance point results in a plane that may fly only once.

The location of the CoG can be changed by moving the heaviest component (battery pack) forward or aft. The plane is supported at the NP and the pack moved fore or aft until the plane displays a slight nose down attitude. If a low wing plane, support the plane upside down.
Larry Dudeck is offline Find More Posts by Larry Dudeck
Reply With Quote
Old Sep 12, 2010, 10:27 AM
The 6 P principle works for me
elecfryer's Avatar
Ventura CA
Joined Aug 2007
923 Posts
try this to adjust balance

First, can you move equipment around, battery fore or aft, ESC fore or aft, re-mount servos - receiver ect....

Second, lead weight like the 6 oz packs that great planes offers that have an adheasive strip on the back. They are segmented in 1/4 oz amounts.

Michael (if your not fryin, your not tryin!)
elecfryer is offline Find More Posts by elecfryer
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Center of Gravity skymaster62 Foamy EDFs 0 Aug 04, 2010 04:09 PM
Help! CENTER OF GRAVITY -What? Where? When? Mena142 Beginner Training Area (Aircraft-Electric) 10 Aug 01, 2010 08:27 AM
Discussion Nitroplanes Condor Center Of Gravity docmike Parkflyers 1 Dec 19, 2009 09:58 PM
Discussion center of gravity for condor pusher jet docmike Nitro Planes 0 Aug 31, 2009 08:05 AM
f-14 center of gravity verus center of lift tony houk Power Systems 5 May 14, 2001 01:48 PM