Newbie Subs - A little modeling, but not too much

[anonymous]

Hi All,

An interesting comment by

Hi All,

An interesting comment by liftmys10 which confirms the 5' problem. I agree with Chuck in terms of 'bang per buck' too.

SubTech gear has an excellent pedigree so it seems surprising. Maybe the sub is designed for swimming pool use - you have more of them than we do in the UK!

Perhaps someone fron SubTech would like to clarify?

David

[Guest]

From looking at pictures of

From looking at pictures of the Subtech encosure, and from what I've read, I would say any issues with pressure integrity would be due to the vac-form construction and equatorial seperation.

Vacformed plastic will be thin in crossection, when compared with extruded plastic pipe etc.

Also equatorial seperation, although allowing good access to all components, does weaken the structure of a cylinder, as well as providing a nice big seal, all the better to spring a leak.

I believe Skip addressed the issues of pressure hull flexing by adding stiffeners spaced along the length of the cylinder.

This will work, as it effectively divides the long cylinder into lots of small ones, and apes fullsize design practice.

Any leaks along the large equatorial seal, can be addressed by careful build practice.

I'm not sure if the Albacore kit has a schraeder valve included but fitting one would be an advantage. It would allow one to check the integrity of the hull seal, with just a few actions of a bicycle pump.

Mild pressurisation of the enclosure would also help the hull with regards to resisting water pressure.

My (highly scientific) method of checking a pressure hull, is to sit my backside on it. If it can take my weight, it's good to go.

Andy