Go Back  RCU Forums > RC Airplanes > Aerodynamics
 CG help please >

CG help please

Community
Search
Notices
Aerodynamics Discuss the physics of flight revolving around the aerodynamics and design of aircraft.

CG help please

Thread Tools
 
Search this Thread
 
Old 08-09-2008 | 02:16 PM
  #1  
Thread Starter
Junior Member
 
Joined: Feb 2004
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
From: Grants pass, OR
Default CG help please

I have a Global Waco bipe, the booklet has long been lost, this is the .30 size plane, I have a .30 FS installed.
I cannot determine CG point, wings are NOT swept, lower is back set approx 2.5" or so, cord is roughly 6" upper and lower wing.
Please advise as to CG point for this plane.

Thanx Bob

[email protected]
Old 08-09-2008 | 11:20 PM
  #2  
Member
My Feedback: (6)
 
Joined: Apr 2002
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
From: Rockford, IL
Default RE: CG help please

Bob

If the lower wing is the same span as the upper, then numerically, a point 2 3/4" back from the upper leading edge would be the 25% point for the pair. That's usually a safe starting point. Someone else here may know about your specific model. If the wings are not set at 0-0 incidence to each other that number will have to be adjusted.

I'd scale the CG from my SRE for you, but the lower wing is smaller.
Old 08-09-2008 | 11:21 PM
  #3  
 
Joined: Nov 2005
Posts: 1,961
Likes: 0
Received 1 Like on 1 Post
From: Auckland, NEW ZEALAND
Default RE: CG help please

Starting point is 1/4 the way horizontally back of the distance from the top wing leading edge to bottom wing trailing edge with the A/C in flying attitude. (25% MAC of this set up)
Evan, WB #12.
Old 08-10-2008 | 12:06 PM
  #4  
BMatthews's Avatar
 
Joined: Oct 2002
Posts: 12,432
Likes: 0
Received 28 Likes on 24 Posts
From: Chilliwack, BC, CANADA
Default RE: CG help please

Only one thread per topic please. This thread is locked.

Continue with the other one...

http://www.rcuniverse.com/forum/m_7828811/tm.htm

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.