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CG Location Calculation

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Old 10-09-2009, 03:23 PM
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Default CG Location Calculation

Is there a service or does someone have a formula for finding CG ?

Procedure includes weight of loaded trailer trunnion (axle centerline on single axle, equalizer on tandem and centerline of center axle on triple axle) and weight of the tongue jack. The jack weight and trunnion weight are separate individual weights and found one at a time. The two weights are then added together to find total weight of loaded trailer.

Measurements are then taken, trailer ball coupler to trunnion, boat bow tip to trunnion, overall boat length, trailer overall length.

Empty trailer is then weighed using same procedure used when trailer was loaded (trunnion and jack separately).

Some believe the CG should be located relative to the aft step on a stepped hull.

What would be a fair price for such a service ?
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Old 10-09-2009, 03:34 PM
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why not just CG it?
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Old 10-09-2009, 03:35 PM
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Hey guys,
I don't know anyone who does this work nor do I have any experience on which to base the price.

John
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Old 10-09-2009, 04:49 PM
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why not just CG it?
Sean, What boat is that ?

We tried doing that, I guess the floor wasn't level. The boat rolled through the wall, down the street, into traffic and didn't see it for a week. When it finally came rolling back it was hung over and looked like it had even been in a brawl !! Some lady HUH ?
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Old 10-09-2009, 04:52 PM
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Hey guys,
I don't know anyone who does this work nor do I have any experience on which to base the price.

John
John, your welcome to send us the numbers, gratis.
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Old 10-09-2009, 05:06 PM
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Quote:
Originally Posted by CcanDo View Post
Sean, What boat is that ?

We tried doing that, I guess the floor wasn't level. The boat rolled through the wall, down the street, into traffic and didn't see it for a week. When it finally came rolling back it was hung over and looked like it had even been in a brawl !! Some lady HUH ?
38 DW

Yes, flat concrete is a requirement for putting it on a roller.
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Old 10-09-2009, 05:15 PM
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Quote:
Originally Posted by CcanDo View Post
Sean, What boat is that ?

We tried doing that, I guess the floor wasn't level. The boat rolled through the wall, down the street, into traffic and didn't see it for a week. When it finally came rolling back it was hung over and looked like it had even been in a brawl !! Some lady HUH ?
now i dont care who you are,THATS FUNNY CHIT.
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Old 10-09-2009, 05:19 PM
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Want a science project ? Try doing the overall C.G. which includes vertical and horizontal axis plus centerline offset.
We did this once with a 62 ton Army tank !
Loadcells, overhead crane and rotating pivot plus many H.P.calculators ( pre-laptop/P.C.)
ed
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Old 10-09-2009, 05:24 PM
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John, your welcome to send us the numbers, gratis.
Thanks!
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Old 10-09-2009, 11:15 PM
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I'm completely lost. I thought CG was Coast Gaurd. I was trying to come up with an alibi ( i'm sure i spelled alibi wrong ).
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