Tip on CG what do you think? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 02-15-2010, 01:07 PM   #11
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Talking Re: Tip on CG what do you think?

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Originally Posted by mark_ View Post
Or, go electric and never worry about it again.
Sorry guys, couldn't resist...
Easy to start too.....

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Old 02-15-2010, 01:40 PM   #12
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Re: Tip on CG what do you think?

Originally Posted by SpaceCowboy View Post
Easy to start too.....

lol. That was kind of the on-going joke at a couple of the IMAC contests in Ontario this year. A group of us were flying electrics at the IMAC Canadian Nats this year, and the judges were also saying the same things. It's even funnier when you hold your fingers out from the prop and pretend to flip it while blipping the throttle.
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Old 02-17-2010, 03:00 PM   #13
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Re: Tip on CG what do you think?

Using gas engines is also an advantage when it comes to tank position. The tank can easily be placed on the C of G (or close to it - darn wing tubes! lol) with no worries.

I believe Ed S you posted this info on tank placement over the C of G using glow engines some time back, as well. I have tried your suggestion on a couple of 2 stroke glow planes and had absolutely no problem when using muffler pressure.

But like others have said, I personally have never heard of balancing a plane with any amount of fuel in the tank. I certainly wouldn't think it a good idea at all especially with tanks mounted just behind the firewall! Believe me, its not a pleasant experience trying to control a plane that is tail heavy!
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Old 02-17-2010, 07:27 PM   #14
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Re: Tip on CG what do you think?

Everyone's been working with one assumption -- the engine/tank is on the nose.

If you're flying a plane like Laddie's NorthStar, the balancing is done with the fuel tank full.

The intention is that the center of gravity never gets rearward of the maximum position on an empty fuel tank.

Laddie made that mistake when he sold his prototype NorthStar to Ron Jellison -- balanced it with an empty tank, then took it up for a last check-out flight. Full-throttle was no problem, slowing down was. At fifty feet, the tail dropped to a vertical position and the plane impacted the water. Both wing opened up like clamshell from having the ailerons ripped out/punched into.
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Old 02-27-2010, 10:19 AM   #15
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Re: Tip on CG what do you think?

One fellow at our field spent about half an hour trying to start his nitro heli. One of my fellow electric flyers made the comment, I see that gentleman is enjoying all the benefits and ease of nitro engines.
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