Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 3 of 3

Thread: northstar cg


  1. #1

    Join Date
    Apr 2005
    Location
    winkler, MB, CANADA
    Posts
    33
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    northstar cg

    Im almost done building my northstar, and I want to check the cg. I check it when it's inverted, right? thanks

  2. #2
    JimCasey's Avatar
    Join Date
    Mar 2002
    Location
    Lutz, FL
    Posts
    1,953
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: northstar cg

    Yep.

    >>Danger- engineering content<<<

    The actual center of MASS is a little higher than the chord-line of the wing. if you balance upside-down, it will have more of a chance to pendulum and hang from the balance point. Right-side up, it's slightly more stable than balancing a vertical baseball bat on your fingertip. difficult up, easy down.

    This is true of any low-wing plane.

    If it STILL is hard to get a real reading, hang it by almost any point on the wing. a line straight down from your hang-point will cross the center of mass. Then hang it from a different point. A line straight down from THAT attach point will also pass through the center of mass. Where the lines cross is the center of mass.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Om34051.jpg 
Views:	7 
Size:	61.5 KB 
ID:	1712181  
    Jim Casey/Seaplane Nerd
    http://www.smilesandwags.com/Floats.html

  3. #3
    MinnFlyer's Avatar
    Join Date
    Apr 2002
    Location
    Willmar, MN
    Posts
    28,519
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: northstar cg

    Thanks for the warning Jim, I hadn't had coffee yet!
    Mike B. AMA# 42400 www.gettingairborne.com
    Ultra Sport Brotherhood #2 - Waco Brother #188 - Cub Brother #2

    \"Those are my principles. If you don’t like them, I have others.\" - Groucho Marx


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 04:32 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.