[PSUBS-MAILIST] Tank Calculator

[James Frankland via Personal_Submersibles]

Hi All,
Can someone please clarify something for me on the psubs 2:1 tank volume
calculator.

"Length of Skirt".  Is this the total height, ie from the centre to the
edge of the tank head?  Or from the edge to the corner\knuckle radius?

My tank heads are these ones.

http://www.purdie.co.uk/products/2-1_semi_ellipsidal.php

Many thanks
James
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