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Old Feb 21, 2013, 05:34 PM
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Dcope17's Avatar
United States, CA, San Juan Capistrano
Joined Feb 2013
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Zagi CG

Sorry for not searching but this site is slow on my phone...
Story, my boss has a Zagi glider ( no motor) and we tried it out the other day and it needed full up elevator to keep it from diving straight down. I know only a little about planes and less about ones without a tail and even less about gliders. So a quick question, where is the CGsupposed to be? I think he said the book put it at 7" from the tip.
Let me go find the box so I can give the model or size, whatever.
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Old Feb 21, 2013, 08:53 PM
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slebetman's Avatar
Malaysia, Selangor, Kajang
Joined Jun 2009
1,430 Posts
Enter the measurements of the Zagi in here: http://fwcg.3dzone.dk/

Since it's a glider, I'd suggest using the 20% value instead of the 15% since gliders prefer to be a bit tail heavy.

BTW, that link is posted in a stickied thread on the "Flying Wings" forum in the electric airplanes section.
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Old Feb 22, 2013, 12:13 AM
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United States, CA, San Juan Capistrano
Joined Feb 2013
137 Posts
Thanks for the help...I'm still learning my way around this forum.
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Old Feb 27, 2013, 12:57 AM
more casual than stylish....
slopemeno's Avatar
Joined Jan 2003
6,950 Posts
Way too nose heavy. Try moving the CG back to 7.75"- 8" back from the nose, and reduce the control throws.

Also, when you get it flying, you'll need about half the elevator throws -vs- aileron throws.

Learn to throw it with your four fingers under the nose, and your thumb on top. You can actually get a pretty decent throw this way.
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Old Feb 27, 2013, 01:17 PM
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United States, IN, Indianapolis
Joined Dec 2005
8,709 Posts
Or tape a clear servo blister package on the bottom as a handle and pushoff.
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