RE: RE: RE: Re: [PSUBS-MAILIST] jettisoning battery pods or other ballast

Here’s the trick we used- we actually formed the cover twice- once to measure how much each side of the flanges warped using a “flat” ring and base.

Then a 2^nd time after making another mold that was “warped” in the opposite direction. Then we milled the sealing surface flat and annealed it to take any residual stress. Don said it was the best one they had ever purchased.

Greg Cottrell

Project Manager

greg@precisionplastics.com

http://www.precisionplastics.com

P please consider the environment before printing this email

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of vbra676539@aol.com
Sent: Friday, June 10, 2011 10:33 AM
To: personal_submersibles@psubs.org
Subject: Re: RE: RE: Re: [PSUBS-MAILIST] jettisoning battery pods or other ballast

It was a little challenging to make the acrylic cover because of the difficulty forming a 2ft x 4ft piece of 1” thick acrylic into a dome shape and also keep the flange from warping. Flanges on rectangular shapes are a little harder to control than they are on spheres. The flange had to be very flat to provide a good seal and keep all that oil from getting out. It was a fun project.

Greg Cottrell

Project Manager

greg@precisionplastics.com

http://www.precisionplastics.com

P please consider the environment before printing this email

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of vbra676539@aol.com
Sent: Friday, June 10, 2011 9:14 AM
To: personal_submersibles@psubs.org
Subject: Re: RE: Re: [PSUBS-MAILIST] jettisoning battery pods or other ballast

I made one of the acrylic covers for the JSL battery housing and looked over the release system with great interest. It’s a pretty sweet set up.

Greg Cottrell

Project Manager

greg@precisionplastics.com

http://www.precisionplastics.com

P please consider the environment before printing this email

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of vbra676539@aol.com
Sent: Thursday, June 09, 2011 8:26 PM
To: personal_submersibles@psubs.org
Subject: Re: Re: [PSUBS-MAILIST] jettisoning battery pods or other ballast

Exactly the method used on the JSLs for the battery box release. The cam holds a suspension rod under compressive tension. Meaning the battery/chassis connection is strong and immobile. When wound open, the hook is rotated open side down, guaranteeing release. Back of box suspended on bronze bushings. The front is released, battery swings in a short arc down and aft and AWAY you go.
Vance

-----Original Message-----
From: MerlinSub@t-online.de
To: personal_submersibles
Sent: Thu, Jun 9, 2011 2:11 pm
Subject: Re: [PSUBS-MAILIST] jettisoning battery pods or other ballast

Realy good solution. Press the weight tight to the hull.

"Jens Laland" <laland@artematrix.org> schrieb:

> Jon

> Here are two sketches (from Hans Techel's book) of a quick release system

> as done on early types of naval submarines when those were still using

> drop keels, ref

> http://traktoria.org/files/personal_submarine/drop-keel/Sicherheitsgewicht.jpg

> Best regards,

> Jens Laland

> ************************************************************************

> ************************************************************************

> ************************************************************************

> The personal submersibles mailing list complies with the US Federal

> CAN-SPAM Act of 2003.  Your email address appears in our database

> because either you, or someone you know, requested you receive messages

> from our organization.

> If you want to be removed from this mailing list simply click on the

> link below or send a blank email message to:

>       removeme-personal_submersibles@psubs.org

> Removal of your email address from this mailing list occurs by an

> automated process and should be complete within five minutes of

> our server receiving your request.

> PSUBS.ORG

> PO Box 53

> Weare, NH  03281

> 603-529-1100

> ************************************************************************

> ************************************************************************

> ************************************************************************

************************************************************************

************************************************************************

************************************************************************

The personal submersibles mailing list complies with the US Federal

CAN-SPAM Act of 2003.  Your email address appears in our database

because either you, or someone you know, requested you receive messages

from our organization.

If you want to be removed from this mailing list simply click on the

link below or send a blank email message to:

        removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an

automated process and should be complete within five minutes of

our server receiving your request.

PSUBS.ORG

PO Box 53

Weare, NH  03281

603-529-1100

************************************************************************

************************************************************************

************************************************************************