Re: [PSUBS-MAILIST] submarine kit-builder's society

[Wilfried Ellmer <info@concretesubmarine.com>]

Marc,

Normally i get paid to give project management advise so i wil make it short...

This is what i would do.

You go to the junkyard and get a hydraulic cylinder, you put a model of your hull in there and test it.
Try to run a big number of pressure cycles to look for fatigue problems.

Do not discuss things with people that have much less idea of the subject than you have - face it - no one knows the answer to the question how a composite hull of this characteristics does behave. This includes the members this forum, me, classification societies, and the rest of the blue planet - so to get a answer don`t discuss - test it out.

As far as i know Graham Hawkes  is building a composite sub pressure hull (unround !) - so you are not all alone with this idea.

Wil
concretesubmarine.com

2010/6/6 Marc de Piolenc <piolenc@archivale.com>

Hear, hear! The ocean doesn't care about opinion - expert or otherwise. Only facts matter.

Marc

On 6/6/2010 5:38 AM, Wilfried Ellmer wrote:

Hello Jon,

I have not been on this forum for quite a while...just a few inputs.

Doing something PIONEER while staying within STANDARDS is like putting
edges on a circle.

If you want to be a "explorer" and keep a "defensive legal position" all
the time - how will that work?

Safety is NOT the same as "Standard conform" - safety does not come from
stamping - safety comes from solid testing and solid overbuild. No
matter if it is standard conform or not.

The sea does not know if your hull is stamped, approved, standard
conform...whatever...it just finds your crush depth - stay sufficiently
away from it - 1:3 - testing is the key.

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