[PSUBS-MAILIST] Casper

Thu May 14 17:36:57 EDT 2015

Hi Graham,  you mentioned ½” plate which is probably an over-kill and I don’t know if you have calculated for the thickness or eyeballed it.  What is the pressure you are rating it to and what is the diameter of your battery pod?  There is an ASME calc for flat end plates that you may or may not be aware of.  ASME uses a safety factor of 4 but Sean or Cliff can possibly elaborate as to whether a safety factor of 2 might be sufficient.  Regards, Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Graham Bayliss via Personal_Submersibles
Sent: Thursday, 14 May 2015 9:22 p.m.
To: 'Personal Submersibles General Discussion'
Subject: Re: [PSUBS-MAILIST] Casper

Hi Alec

Yes i am the one with the flat plate ends to my battery pods they are half inch thick and should not buckle at the depths i intend to use her. I have come up with an idea for adding weight if it is required i will have trays fitted to the top of my battery pods here i can add  and weight which i will strap down when required. Weights will be made up of concrete  which will not corrode.

Regards 

Graham 

Master Casper 2

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alec Smyth via Personal_Submersibles
Sent: 12 May 2015 13:46
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Casper

Congrats Graham!!! Wow, she's an armor-plated version of the K350 and looks solid as can be without sacrificing good looks. Usually K350's require about 400 lbs of ballast, so I suspect Casper 2 might be better trimmed than most. I see very nice build quality and a lot of personalized touches. My only concern would be the use of flat plate instead of endcaps for battery pods and hatch, but I seem to recall Graham saying she was intended for very shallow service. Or maybe the comment was from someone else who did the same, I can't recall as it was some years ago. But very well done!

Well, we have a sub on the Isle of Man and another on Guernsey now. I'm green with envy, wish I had ocean all around instead of concrete with terrible traffic.

Cliff, here's the project page: http://www.psubs.org/projects/1260127846/casper2/

Best,

Alec

On Tue, May 12, 2015 at 7:15 AM, Clifford Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Pictures, we need pictures!  Have you uploaded the project to the psubs site?

Cliff

On May 12, 2015, at 5:48 AM, Graham Bayliss via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi 

I have finished building Casper two five years of my life have gone into her so no rush to launch her i will go over everything and check every nut and bolt and seal . i will write a check list for every dive i would like to thank every one in the club who has opened my mind to ways of creating such a beautiful submarine. I have listened to your problems and this has made me think harder to over come some of the problems that have come up over the years. I will keep you posted as to when i first introduce her to her rightful home the sea i have been asked to take her to a local museum for a short while to show people that every thing is possible if you have a dream it can become a reality. Someone once said you will never build a mini sub well i have proved them wrong and the proof is in the end product. Again i would like to thank you all for your inspiration may we all live our dreams and  enjoy our dives.

Regards 

Graham Bayliss 

Master Casper 2

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20150515/d1dda36a/attachment-0001.html>