----- Original Message -----
Sent: Thursday, November 05, 2009 2:52 AM
Subject: Re: [PSUBS-MAILIST] dome hatch lift force
Thanks Oystein & Jens,
I was just getting an idea of the upward force on the acrylic
dome attachment mechanism, wich in my case would be
about 27kg (550mm dome) minus the weight of water on it at the point of submerging. (more calculations).
Regards Alan
----- Original Message -----
Sent: Wednesday, November 04, 2009 11:37 PM
Subject: Re: [PSUBS-MAILIST] dome hatch lift force
F(N)=int.pressure(Pa)*(Area_int.hatch (m^2) Internal upward force
F(N)=ext.pressure(Pa)*(Area_out.hatch (m^2) = External downward force
In addition the self weight of the hatch will cintribute to downward force.
2009/11/4 Alan James
<alanjames@xtra.co.nz>
Hi psubbers,
I'm trying to calculate what the lifting force will be on the
dome in my hatch when it is just submerged; but aren't
quite sure what I have to take into consideration to calculate this. Any thoughts on this?
Thanks, Alan
--
Vennlig hilsen
Øystein Skarholm