[PSUBS-MAILIST] G.L. summary Pressure Hull

[hank pronk]

I just did a 1/2hr run on my new drive with the shaft tube full of water and under 500psi.  The seal works perfectly and there is very little heat build up.  I was surprised how much the motor pulls down after 200psi.  I assume it is from the shaft pushing into the thrust bearing.  Also I am running the motor on 12v because it spins to fast on 24 with no load.
Hank



On Thursday, December 12, 2013 1:27:28 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
  
Vance,
Thank you, it only took me two tries to make the assembly and 5 tries to make the shaft.  Rookie machinist and all.  :-)
Hank 



On Thursday, December 12, 2013 12:36:27 PM, Alan <alanlindsayjames at yahoo.com> wrote:
  
Carsten,
Your friends in Hamburg wouldn't be happy with the get wet solution.
As an after thought on my ambient, I put a AOP valve above my
head & through the dome. It works the opposite way round, so that if
I dive too quick & the hull doesn't equalise, I get water on my head.
The hull is equalised with divers regulators so better to get wet
than the regulator diaphragm rupturing.  The manual operation of the
AOP let's me flood up to the top of the dome in an emergency exit,
as there may be too much force on the latches to open them with
air in the dome. 
Alan


Sent from my iPad

On 13/12/2013, at 7:33 AM, " " <MerlinSub at t-online.de> wrote:


   
If you have an over-pressure valve handle obstructing 
the Alan 
movement 
of the hatch latch handle, it would need to be 
spring 
loaded or you would create the problem of the possibility 
of diving with 
the valve open later on.


Yes, and if you dive with a open valve 
you get wet
learn to close it and learn to read you "pre-dive" checklist. 

:-O   

SL not required an blocking mechanism on the 
hatch - just an 
simple spring loaded automatic overpressure valve. 
Because of the automatic there is no need to block the hatch. 
The air 
sound of the working valve is a clear signal not to open the hatch.
The 
function of the valve should be anyway mention in the written manual. 

very best regards

Carsten

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