Notices
Off Topic Forum - Planes/Helis Get to know your fellow RCU member modelers in here and discuss off topic non-rc stuff. Only two topics OFF LIMITS are religion and politics. This forum for airplanes and heli crowd. Car or truck fans have their own in car section.

Find CG

Old 07-07-2021, 02:47 AM
  #1  
Sahriar
Junior Member
Thread Starter
 
Join Date: Jul 2021
Posts: 2
Received 0 Likes on 0 Posts
Default Find CG

How to find CG of Sig model airplane..??
Old 07-07-2021, 02:59 AM
  #2  
BarracudaHockey
My Feedback: (11)
 
BarracudaHockey's Avatar
 
Join Date: Jul 2003
Location: Jacksonville, FL
Posts: 26,066
Received 248 Likes on 200 Posts
Default

Download the manual and find out what they spec
Old 01-14-2022, 02:37 AM
  #3  
ggfalcon36
Junior Member
 
Join Date: Jul 2019
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default CG location

If the wing on your airplane is basically straight (and not swept), and if it is conventional wing first, and not a canard.. you can basically measure the chord of the wing (leading edge to trailing edge), and multiply times 25%. One forth of the way back on the wing. Just about every standard airplane will balance between 25%-30%. If you opt for nose heavy, say 20% back from the leading edge you may need slightly more elevator input. If you move the balance point rearward, you will need a larger bag to put the pieces in. Rearward CG location.. a little at a time, will make a airplane less and less stable. Might be great if you want snap rolls to be more crisp. But if you go too far, the airplane becomes uncontrollable. So if you don't have plans, start with slightly nose heavy, and move it rearward as you become more confident, with good control.

If your model has a lifting tail (top of the horizontal stabilizer is curved, bottom side is flat).. the CG can go to the rear a bit more.
Old 05-02-2022, 12:08 AM
  #4  
Joseph Frost
 
Join Date: Nov 2010
Location: Coffs Harbour NSW, AUSTRALIA
Posts: 1,361
Likes: 0
Received 46 Likes on 44 Posts
Default

It's easy to find out CofG spot for any ARF, or model in kit form, just get a hand on the instruction manual, most are listed online. Different story with scratch build models of your own design.
I got a simple solution, I normally build smaller, identical scale prototype either as a hand or catapult/bungee launcher to give me a good idea what the real thing will be flying like.

Well before finish of the project I'll check the CofG with smaller built proto.

Sling shooting cg trials.


Upgraded from 8 to hot 10S.

Another example.

Mini proto launch trials.
The following users liked this post:
Cecil Webb (09-13-2022)
Old 09-13-2022, 10:38 PM
  #5  
Cecil Webb
Junior Member
 
Cecil Webb's Avatar
 
Join Date: Sep 2022
Location: United States
Posts: 11
Received 1 Like on 1 Post
Default

Great pic

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.