How to Determine Cof G - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-04-2008, 06:14 AM   #1
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How to Determine Cof G

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I just bought a used Telemaster 70 and after installing receiver and doing what needed to be done, I was just wondering how you would figure out the C of G to balance it. I read somewhere that it should be 1/3 of the chord which would make it 4 inches from the LE. Any thoughts or suggestions. Also would anyone be able to suggest some numbers to start with for the throws on the control surfaces.

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Old 05-04-2008, 09:15 AM   #2
Frank Klenk
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Smile Re: How to Determine Cof G

Here's how I figure it out. This gives you a good start point, no guessing. The other alternative of course is borrow a set of plans. Here's the link ...
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Old 05-04-2008, 10:15 AM   #3
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Re: How to Determine Cof G

CG is generally 25 to 30 percent of the wing chord. on a constant chord wing such as the telemaster it is easily measured.

I'd set it at 25 percent to start and adjust to the feel I liked.

The telemaster is the all time best trainer design out there and about the only one with a flying stab. You'll love this airplane.
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Bouncing about the living room, my then three year old grandson declared himself "a kangaroo".
"If you're a Kangaroo, what is Grampie", I ask.
His reply: "you a dinosaur"
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Old 05-06-2008, 03:50 PM   #4
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Smile Re: How to Determine Cof G

Thanks for the tips. Got it all set up and took it up for a spin today, flys like a charm and sounds so nice with the OS 48 FS.
Thanks again
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