RE: [PSUBS-MAILIST] Dome Attachment Means Options

Hi Jay,

I missed that other, carbon fiber composite strap at the bottom. It's such an alien configuration to me to have that lower area of the dome covered in composite. I had at first thought it was just a flexible material that was there temporarily like the blanket. I also noticed the strap that runs to the top widens before as it gets to the metal hatch ring, which makes me wonder it that strap is composite as well.

For centering a hatch to the hatch land, I usually think of it as being done much like the stepped configuration on Cliff's R300, and/or done with the hatch hinge. I don't really know what the two grooves in the hatch land are for, my guess was they where O-ring glands. That's one reason why I wanted to share it with the group, to get there take on it. Hope fully we will find out more from some one more in the know at some point. In any case it's a interesting project to be sure.

Your resident pipe dreamer ;)'

Regards,
Szybowski

From: bottomgun@mindspring.com
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Dome Attachment Means Options
Date: Tue, 2 Sep 2008 16:42:40 -0400

Brent,

Thanks for supplying the link once again. I see more than one strap in this image, (is it in a Y-configuration?). There is one blended into the carbon fiber composite at the bottom front of the dome and another just barely visible along the top of the dome running down to the other strap.

It is hard to discern if that is a raised land but looks more like two grooves.

R/Jay

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

Talk sense to a fool and he calls you foolish.

- Euripides (484 BC - 406 BC)

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Tuesday, September 02, 2008 4:19 PM
To: PSUBSorg
Subject: [PSUBS-MAILIST] Dome Attachment Means Options

Greeting Subbers,

You might of noticed the the Deep Flight challenger has only one strap going over the dome to hold it down. I didn't notice it right off, since it blends in some what. If they do have a second one they have designed to be installed, it's not on in that picture. The DeepWorker sub hatch domes look to have two straps, that are perhaps out of 316 SS. The one on the challenger looks to be powder coated to me. I would expect that they also have some type of soft urethane or rubber gasket under the straps to make a nice soft connection.

As for what they use for a seal under the glass or acrylic domes I don't know. I would guess it might be a hard urethane gasket. I can't tell for sure but there looks to be a large metal lip inside the Deepworker's dome, for perhaps keeping the dome centered and helping keep the gasket from moving inside at pressure. Perhaps Phil will enlighten us, if we are really lucky. ;)'

http://bp3.blogger.com/_FlxDEKxj5U4/R8IeBNG7yII/AAAAAAAAACw/af_AI6qySU8/s1600-h/DSCN1308.JPG

Your resident dome holder ;)'

Regards,
Brent Hartwig