Go Back  RCU Forums > RC Airplanes > Aerodynamics
 Help CG for flying wing thing >

Help CG for flying wing thing

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

Help CG for flying wing thing

Thread Tools
 
Search this Thread
 
Old 02-13-2008 | 11:44 AM
  #1  
Thread Starter
Member
My Feedback: (61)
 
Joined: Jan 2004
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
From: shelocta, PA
Default Help CG for flying wing thing

Does anyone have a formula for finding the CG of this thing? Sort of looks like one of the ships from the tv series, battlestar galaktica. Or even if anyone has a name, that might help me.
Attached Thumbnails Click image for larger version

Name:	By76202.jpg
Views:	22
Size:	59.5 KB
ID:	877642  
Old 02-13-2008 | 11:59 AM
  #2  
Senior Member
 
Joined: Oct 2005
Posts: 11,517
Likes: 0
Received 2 Likes on 2 Posts
From: Near Pfafftown NC
Default RE: Help CG for flying wing thing

Look at the recent thread: C.G. calculator

The 2nd or third post in it lists 4 online applications that take your measurements and spit back out a CG location. Two of them are worthwhile if you model has a "normal" tail. Two of them only use the wing measurements. They aren't of much value for a normal model, but would be great for a flying wing.
Old 02-13-2008 | 12:20 PM
  #3  
Thread Starter
Member
My Feedback: (61)
 
Joined: Jan 2004
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
From: shelocta, PA
Default RE: Help CG for flying wing thing

Thanks da rock,
I had seen those web sites and tried my figures. I don't have a tapered leading edge, rather a tapered trailing. Thanks
Old 02-13-2008 | 01:48 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: Help CG for flying wing thing

Use a MAC (Mean Aerodynamic Chord) calculator to find the MAC and then put the CG at 18% of the MAC and just extend that to the wingtips so you know where to put your fingers.

Flying wings provide their own stability so you need to do the CG differently. On any flying wing under no circumstances should the CG ever go further back than around 23 to 27%. Even with that range the model would be pitch neutral. Further back than around 27% and it'll want to swap ends. Normal CG ranges for flying wings is around 18 to 22% of the MAC.

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.