RE: Center of Gravity

Bandit created the topic: Center of Gravity

I know their is a formula for finding the center of gravity on a RC boat. Can you help.
Thanks
Bandit
#11225

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marc replied the topic: RE: Center of Gravity

Welcome to the site.

CG is normally referred to as % of boat total length (transom to tip). Say you want a 32% CG and your hull is 45 inches long. You would take 45 and multiply it by the desired CG. So 45" x 0.32 = 14.4". You would then measure 14.4" from the transom forward and mark the hull at this point. You then layout everything in the hull to get the boat to balance at this point.

On the other hand if you're trying to figure out what the CG of a boat is currently at, you find the point where it balances and mark the hull at that point. Measure from the transom to that point and divide it by the total length of the boat. So for the same example, let's say the boat balances at 14.4" from transom, and the total length of the boat is 45". You would do the following calculation to find the actual CG... 14.4" / 45" = 0.32 (32%). Hope this helps.

See this article for some more info on the subject: www.modelgasboats.com/Magazine...Proper_Balance/

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#11226

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gixxer6 replied the topic: Re: RE: Center of Gravity

hi how do i no what % cg i should be aiming for
#20374

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marc replied the topic: RE: Center of Gravity


It's pretty much different for every hull type. Best person to advise you should be the manufacturer of that hull. If it happens to be reviewed on this site you can get baseline numbers from our article. Otherwise check with the manufacturer or give us a bit more details on what you have and maybe someone can point you in the right direction. :)


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#20378

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Scott replied the topic: Re: RE: Center of Gravity


Loaded question right there :silly:

Hull manufactures recommendation

Ask / Inquire of others using same hull / power where they found best

Ask a general inquire to the readership PROVIDING some specific on hull / motor/ Intended use etc ...

2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
#20379

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