[PSUBS-MAILIST] Windows

Sun Dec 15 15:09:12 EST 2013

Carl Stanley has a 30 yr old dome on his sub.  The mbt window is also Plexi Glass G same as port windows.  The mbt window was so bad you could not see through it.
Hank

On Sunday, December 15, 2013 12:21:10 PM, Hugh Fulton <hc.fulton at gmail.com> wrote:

A question for the experts. Is it acceptable to have old windows re-polished and then possibly annealed to restore them.  I have 8 that are 25 years old and need to be replaced according to ABS etc.
What is the official word on this.  I note that the windows below were from an MBT rather than main windows.   Chs  Hugh

From:Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of vbra676539 at aol.com
Sent: Monday, 16 December 2013 6:21 a.m.
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] G.L. summary Pressure Hull

Very nice indeed. It's what I figured to do. Glad to hear it is a working hypothesis. 
Vance

-----Original Message-----
From: hank pronk <hanker_20032000 at yahoo.ca>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Sun, Dec 15, 2013 12:13 pm
Subject: Re: [PSUBS-MAILIST] G.L. summary Pressure Hull
Vance,
I had the fellow who works for me buff one of the mbt windows.  he runs a small body shop in our off season, so he is a pro at buffing.  I gave him the most beat up window in the lot.  He brought it back to like new condition.  There are a couple of deep scratches that are not worth worrying about.  With water on both sides of the glass the scratches disappear.  I a very confident the original port windows will be like new when he is finished with them.  How nice is that
Hank

On Saturday, December 14, 2013 2:46:44 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
Vance,
I am sure it will be fine, it makes sense that the motor will draw down with an increase of pressure acting on the shaft.
I am back to work on the manipulator now.  It is nice to have a change.
Hank

On Saturday, December 14, 2013 1:46:23 PM, Vance Bradley <Vbra676539 at AOL.com> wrote:
Well, maybe a break in period will help, too.
Vance

Sent from my iPhone

On Dec 14, 2013, at 3:36 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
Hi Vance,
>Yes it is linear, it is a very smooth and gradual.  Everything spins freely.  I may have a bit to much grease on my thrust bearing also.  
>Hank
> 
>On Saturday, December 14, 2013 1:26:10 PM, Vance Bradley <Vbra676539 at AOL.com> wrote:
>Linear meaning a steady increase in demand in parallel to rising pressure. If you have a low rise with a sudden increase somewhere along the line then you may have a component not working as it should.
>Vance
>
>Sent from my iPhone
>
>On Dec 14, 2013, at 3:02 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>Hi Vance,
>>I did not have it in the sub so it was not hooked up to the amp gauge.  What do you mean by linear.
>>Hank
>> 
>>On Saturday, December 14, 2013 11:12:40 AM, Vance Bradley <Vbra676539 at AOL.com> wrote:
>>How much did your amperage increase at depth? Was the load increase linear?
>>Vance
>>
>>Sent from my iPhone
>>
>>On Dec 14, 2013, at 1:07 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>>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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>>> 
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>_______________________________________________
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