Re: [PSUBS-MAILIST] Useful units and metric Conservation Factors

["Herve Jaubert" <caribsub@coqui.net>]

Wow I am going to keep those charts!
Thanks Carsten
Herve Jaubert
----- Original Message -----
From: Carsten Standfuß <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, December 05, 2000 2:25 PM
Subject: [PSUBS-MAILIST] Useful units and metric Conservation Factors


> This mail is just for the archiv files.
> Search words "units and metric"
>
> Useful units and metric Conservation Factors
>
> LENGTH
>
> 1 inch (in/") = 25,4 mm
> 1 ft = 0,305 m
> 1 yard = 0,914 m
> 1 mile = 1,609 km
> 1 sea mile (sm) = 1,8531 km
>
> VOLUME
>
> 1 cubic inch (cu in) = 16,387 cc
> 1 cubic inch (cu in) = 0,016 liter
> 1 cubic foot = 0,028 m3 or 28 liter
> 1 Imp pint (pt) = 0,568 liter
> 1 US pint (pt) = 0,473 liter
> 1 imperial gallon = 4,546 liter
> 1 US gallon = 3,785 liter
> 1 imperial gallon = 1,205 US galls.
>
> WEIGHT
>
> 1 ounce = 28,35 gramm
> 1 pound (lbs) = 0,454 kg
> 1 hundredweight (cwt) = 50,802 kg
> 1 metric tonne = 1000 kg
> 1 ton = 1016 kg
> 1 ton = 1,016 metric tonnes
>
> SPEED
>
> 1 foot per second = 0,305 m/s
> 1 mile per hour = 0,447 m/s
> 1 mile per hour = 1,609 km/h
> 1 knot = 1,151 miles per hour
> 1 knot = 1,853 km/h
>
> POWER
>
> 1 horsepower (hp/HP) = 550 ft lbf/s
> 1 horsepower (hp/HP) = 1,0139 metric hp
> 1 horsepower (hp/HP) = 76,04 kgf m/s
> 1 horsepower (hp/HP) = 745,7 W
> 1 metric hp (mHP/CV/PS/PK) = 75 kgf m/s
> 1 metric hp (mHP/CV/PS/PK) = 735,5 W
> 1 ft lbf/s = 0,1383 kgf m/s
> 1 ft lbf/s = 1,356 W
> 1 watt (W) = 0,7376 ft lbf/s
> 1 watt = 0,102 kgf m/s
> 1 watt = 1 J/s
> 1 watt = 1 Nm/s
> 1 watt = 0,00095 B.Th.U/s
> 1 kW = 1,341 hp (HP)
> 1 kW = 1,36 metric (mHP)
>
> FORCE
>
> 1 lbf = 4,448 N
> 1 tonf = 9,964 kN
> 1 kgf = 9,807 N
> 1 N = 0,2248 lbf
>
> TORQUE
>
> 1 pound-force foot (lbf ft) = 0,1383 kgf m (m-kg)
> 1 pound-force foot (lbf ft) = 1,356 Nm
> 1 kgf m (m-kg) = 7,233 lbf ft
> 1 kgf m (m-kg) = 9,8067 Nm
> 1 Nm = 0,102 kgf m
> 1 Nm = 0,7376 lbf ft
>
> PRESSURE
>
> 1 bar = 1000 millibar
> 1 bar = 0,98692 atmosphere
> 1 millibar = 0,01450377 pound per square inch
>
> DENSITY
>
> Freshwater = 1,0 t/m3
> Saltwater = 1,025 t/m3
> Steel = 7,86 t/m3
> Aluminium = 2,74 t/m3
> Acryl = 1,19 t/m3
>
> Some Examples :
>
> A dive deep of : 1200 ft = 1200 x 0,305 m = 366 meter
>
> A tank of 20 cubic foot = 20 x 0,028 m3 = 0,56 m3 or 560 liter
>
> A pressure bottle with 4,5 liter under 225 bar
> has a capazity of 4,5 l x 225 bar = 1012,5 liter
> with 1012,5 / 28 = 36,16 cubic foot
>
> Simple formulas :
>
> Volume of a cylinder :  (given = diameter and length)
>
> diameter x diameter x length x 0,785375 = Volume
>
> example : diameter = 2,5 m , length = 10 m
>
> 2,5 x 2,5 x 10 x 0,785375 = 49,08 m3
>
> displacement in freshwater = 49,08 x 1,0 = 49,08 t
> displacement in saltwater  = 49,08 x 1,025 = 50,307 t
>
> thickness of the cylinder shell given with 1 inch = 25,4 mm
>
> medium diameter = 2500 mm (2,5m) - 25,4 mm = 2474,6 mm
>
> periphery = 2474,6 x pi (3,1415) = 7774,19 mm or 7,77 m
>
> Area of shell = periphery of medium diameter x length
> = 7,77 m x 10 m = 77,7 m2
>
> Volume of shell material = 77,7 m2 x thickness
> = 77,7 m2 x 0,0254 m = 1,97358 m3 material
>
> in steel = 1,97358 x 7,86 (density of steel) = 15,51 t
>
> in aluminium = 1,974 x 2,74 = 5,41 t
>
>
> without any guarante, Carsten
>
>