Sail Cloth Weight Conversion, grams/sq-meter ---> oz/yard???

[Dave Witte]

Jim Manzari <man...@bluewin.ch> wrote in message
news:396D1215...@bluewin.ch...
> I'm trying to determine if a main sail built in Germany is the correct
weight
> for a boat. The cloth is spec'd at 355g/sq-meter. I need to know its
weight
> expressed in ounces/yard, where a "yard" is the unusual measure of 36
inches
> by 28-1/2 inches.
>
> Can anyone help with a conversion formula? I'm hoping someone will have
this
> readily available, so far all I've got is a headache trying to come up
with a
> solution.
>
> Thanks for the help...
>
> Jim Manzari
>

I believe the conversion would be as follows:

(355 g/m^2)(m^2/39 in^2)(oz/28g)((28.5in*36in)/yd) = 8.55 oz/yd

The numbers may be slightly off but probably close enough for sake of
analysis. Hope it helps.

Blue Skies,
Dave

[Nicholas Carey]

[courtesy copy sent to cited author via email]

"Jim Manzari" <man...@bluewin.ch> wrote...

> I'm trying to determine if a main sail built in Germany is the
correct
> weight for a boat. The cloth is spec'd at 355g/sq-meter. I
need to
> know its weight expressed in ounces/yard, where a "yard" is the
> unusual measure of 36 inches by 28-1/2 inches.
>
> Can anyone help with a conversion formula? I'm hoping someone
will have this
> readily available, so far all I've got is a headache trying to
come up with a
> solution.

Well there are 28.350 grams per avoirdupois ounce, so 355g
is 12.52226 ounces. And 1 meter is 39.37008 inches; ergo,
1 square meter is 1550.00310 square inches. You're [not-so]
square yard is 1026 square inches.

We've already got our weight in oz/square-meter: 12.52226 oz.
per sq. meter. now we just have to convert that to ounces per
[not-so] square yard. And that's simple algebra:

12.52226 oz. / 1550.00310 in^2 = X oz. / 1026 in^2

Just cross multiply and solve for X:

12.52226 oz * 1026 in^2 = 1550.00310 in^2 * X oz.

X oz = ( 12.52226 oz * 1026 in^2 ) / 1550.00310 in^2

X oz = ( 12.52226 oz * 1026 ) / 1550.00310

X oz = 8.2889 oz.

So you're 355g/m^2 fabric is about 8-1/4 oz. per your
not-so-square yards.

Cheers!

N.
--

[Nicholas Carey]

[Jim Manzari]

I'm trying to determine if a main sail built in Germany is the correct weight
for a boat. The cloth is spec'd at 355g/sq-meter. I need to know its weight
expressed in ounces/yard, where a "yard" is the unusual measure of 36 inches
by 28-1/2 inches.

Can anyone help with a conversion formula? I'm hoping someone will have this
readily available, so far all I've got is a headache trying to come up with a
solution.

Thanks for the help...

Jim Manzari

[Ron Scharf]

Typo in the formula: The conversion from m^2 to in^2 should be (m^2/39^2
in^2), not (m^2/39 in^2).

The result is correct, though.

Reminds me of my first scuba dives here in the states: trying to convert tank
pressure in "bar" (as shown on my German gauges) into lbs/in^2... ;-)

Ron

Dave Witte wrote:

> Jim Manzari <man...@bluewin.ch> wrote in message
> news:396D1215...@bluewin.ch...

[Greg]

it's simple
there's 42.82 grams per sailmakers yard (36" x 28.5")
nominally the cloth would be called 8 1/4 oz. here in the States.

[Jim Manzari]

Thanks to all that responded with a solution to this question. I've
tried to thank you directly, but may have been defeated by spam traps,
hence this public "thank you".

Best regards to all...

Jim Manzari

[Terry Spragg]

28g / oz, 1.2 yd per sq meter is close enough, if a bit high on the
metric side, so...

355/28=12.7*1.2=15.25 oz/yd close enough?

Terry K

[...]

http://fuji.stanford.edu/converter/
http://www.ur.ru/~sg/transl/
http://www-sci.lib.uci.edu/HSG/RefCalculators.html

Terry Spragg wrote:

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