Re: [PSUBS-MAILIST] viewport testrig

[MerlinSub@t-online.de (Carsten Standfuss)]

Hi Emile, thats exact the way we test the big glas windows 
for the big meagyachts. The main reason for this procdure is to test the
glas and the frame together. On our last yacht it was a class (LRS)
requirement to test at least two tipical windows. Takes about two weeks 
to build the frame - glue the glas - bolted all together in the test
tank. Cost about one Kittredge sub Kit.. Destroyed in a minute or less. 

If you want to go that way -okay - but you have to test about - say 3
portholes and get the same result before you belive it.. 

For submarine Windows and portholes the ABS rules and calculation 
workes just fine. 

regards Carsten

> Emile schrieb:
> 
> Hello,
> 
> In the discussion on viewports comes tru that they are difficult to
> calculate an predict.
> I have a simple idea to test them ( Also the glass, housing and seal)
> very realistic. I posted an Acad` sketch on moki what makes it clear.
> Al you meed is a complete viewport assy, a thick steel plate, a
> pressure gauge and a hydraulic pump( a high pressure cleaner with
> bleed valve wil also do).
> Rise the pressure slowly (testing materials quick gives a higher
> reading) til failure. if the gauge says 50 bar, destuction depth for
> the viewports is 500 meter.
> Maybe it exists already 30 years or somebody knows it doesnt work;
> please shoot at it.
> 
> 
> regards, Emile van Essen