Hi Onno,
I probably should have listed the URL for people to look at for their own
instead of using my listing. The Block Co-efficient was .62 in the formula -
which can be varied depending upon the hull. Unfortunately, I'm not conversant
enough to know which direction the Block Co-efficient is supposed to change. I
get the feeling that the closer the Block Coefficient gets to 1, the more it
resembles an actual rectangular shape with no curves, while the closer it gets
towards 0, the slimmer the hull is with perhaps a deeper cutting centerline.
But, it is a step in the right direction :)
Hal
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Onno Meyer
Sent: Monday, September 26, 2011 1:25 PM
To: The GURPSnet mailing list
Subject: Re: [gurps] Age of Sail and GURPS VEHICLES
Hal wrote:
> GURPS VEHICLES used the concept that a displacement ton was equal to about
> 35 cubic feet of water. While looking up Builder's Old Measurement in
> WIKIPEDIA, I stumbled across this pertinent piece of information:
>
> Deadweight = Length x Beam x Beam/2 all divided by 94.
Hello Hal,
the problem is in the relation between total hull volume and
normal vehicle displacement. A short ton of (fresh) water is
about 32 cf, if I get my maths right. So the 35 cf figure is
for a ship loaded almost to the gunwales.
Going from displacement to deadweight brings another major
fudge factor, since different ship types have different
hull and engine percentages.
I've seen similar formulas relating weight to depth in the
hold -- like your formula, this assumes a standard shape,
scaled to different sizes.
Regards,
Onno
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