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Re: [PSUBS-MAILIST] Weighing
Carsten,
I would love to ride in that sub when you are finished!!! I always
wanted to build a bigun!
GB
At 11:47 AM 8/5/2002, you wrote:
>Gary R. Boucher schrieb:
> >
> > Carsten,
> >
> > Did you say you were supplying the Barbeque? I would almost fly to
> > your country to witness a SWB!
> >
> > I have a couple of thoughts on weighing your sub. I once thought of
> > devising a lever with a ball bearing pivot point. It could be constructed
> > from a long piece of channel iron. When one end is pulled down the other
> > raises. In other words lots of mechanical advantage. The short end would
> > be under some structural lift point. The longer end is where extra weight
> > could be added. If you had several of these placed at strategic locations
> > left, right, forward, and aft of your boat and enough weights were added to
> > the levers to lift the sub slightly, the sub could be weighed to locate the
> > longitudinal, and lateral CMs. The calculations are easy if you have the X
> > and Y locations for each scale with the weight indicated on each. You
> > don't even have to have them in any particular locations. You just have to
> > know the X and Y coordinates of each. Just lift the hull so that all
> > weights are handled by the scales and the numbers will come out.
> >
> > What kind of weight are we talking about. I know its huge!
> >
> > G Boucher
>
>Hey Gary
>
>The 150 t crane witch will put the 57/67 ts unit on the slipwaycar in
>some years
>will give me a fine estimate figure.
>
>And the exact trim I will find in the water. If you look at the
>construction pictures
>of the bow and stern section near the waterline at the free flooding
>deck structure
>- you will find 3 small hole strips about 0,5 inch high by 6 inch long
>and vertical
>locate each 4 inch on both sections and on both sides.
>
>If the waterline is just flooded to the bottom part of the lowest one on
>all four
>marks (Two on the bow, and two on the stern) the boat is in pre-dive
>trim.
>I mark the holes before cutout with a laser with a meassured distance
>form the keel.
>And yes - you need a fine bouancy calculation before you can go this way
>:-) .
>
>regards Carsten