Re: [PSUBS-MAILIST] Dry Ballast

[MerlinSub@t-online.de]

http://www.psubs.org/faq.html#bouyancy

To get an air bubble of 1 m3 to sink you need 
1 t of steel in freshwater. In saltwater you need about 
1,025 t of steel. 

For the reason that the steelballast itself has also an displacement 
of 1000 liter / 7,86 density steel = 127 liters bouancy - you need
additional 127 kg of steel (with a volunme of 16 liters.. )
to sink this 16 liters displacement you need 2kg steel with a volume of.. 

So to sink just the airbubble in freshwater is 1 t steel.
To sink the airbubble and the steelballast about : 

1000 kg steel
+127 kg steel
+  2 kg steel 
------------
1129 kg steel 

right ?   Carsten 



"Ludvig Langborg" <givdul90@hotmail.com> schrieb:
> Hi!
> Im doing some calculations on a sub idea i have and I wounder if anyone of 
> you knows exactly how much steelballast it is required to get for example 1 
> cubicmeter of air to sink.
> Best regards:
> Ludvig Langborg
> 
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