Hi, Alan - sure, will add.
For all the other psubbers that receive these posts
. . . very bad form of me to not preface my earlier posts with a HAPPY NEW YEAR to all you guys! In the new year, please
remember the Nuytco creed: " If you don't have a submarine - get
one!"
Regards
Phil
----- Original Message -----
Sent: Sunday, January 02, 2011 12:11
PM
Subject: Re: [PSUBS-MAILIST] Cliff's
Hatch Closure Mechanism.
Hi Phil,
Can I be added to the mail out if you find that
drawing thanks.
I'm trying to sort out what I'm doing re a hatch
closure mechanism.
Regards Alan
----- Original Message -----
Sent: Monday, January 03, 2011 8:55
AM
Subject: Re: [PSUBS-MAILIST] Cliff's
Hatch Closure Mechanism.
Hey, Cliff!
I'll scrounge thru' some of the old drawings,
when I get a chance, and see if I can find the spiral hatch closure drawing
to post - it's just a simple cam but really easy to make and works
well.
Phil
----- Original Message -----
Sent: Sunday, January 02, 2011 10:32
AM
Subject: Re: [PSUBS-MAILIST] Cliff's
Hatch Closure Mechanism.
Jim, I am assuming this was directed at me.
I agree with your three additional reasons for having a hatch
mechanism that can be closed from either inside or
out. To externally close the hatch on my boat, I
have to use an external clamp which is klutzy.
As to the need to have an overpressure release that is external,
I don't see the need. Actually what I installed on my boat
for overpressure is a pressure relief valve with a small
cracking pressure (<1 psi). My thinking was this would
automatically protect the boat from over pressurization. I
think a manual ball valve that the pilot routinely opens and closes as
part of NOP to equalize prior to opening a hatch would work fine as
well.
I really like Phil's design for hatch release mechanism for the
DeepWorker 2000. If you email me off line, I will send you a couple
of pics I took at the Vancouver Psub convention of the mechanism.
If ever get a chance to visit Phil's toy factory in Vancouver, you
will think you have died and gone to heaven.
Cliff
From: "JimToddPsub@aol.com"
<JimToddPsub@aol.com> To:
personal_submersibles@psubs.org Sent: Sun, January 2, 2011 9:26:57
AM Subject: Re:
[PSUBS-MAILIST] Cliff's Hatch Closure Mechanism.
Phil,
Exterior emergency access is one reason this seems
to be advisable. Also:
1. The boat is in the water unoccupied and you
want to keep waves and wake from splashing in.
2. Towing it on a trailer down the highway in a
rain storm.
3. Keep insects from entering and setting up
housekeeping while not in use.
Would there be a need to have an over-pressure release
operable from the exterior also? Do you prefer a pressure
release that is manual or automatic or is it dual mode?
I've gone through a couple of different designs in
my mind, but really wanted to see yours when I'm in the San Antonio
area. Thanks for mentioning the Deepworker 2000. That's one
more reason to make an educational pilgrimage to
Vancouver.
Jim
In a message dated 1/2/2011 8:33:58 A.M. Central Standard Time,
cliffordredus@sbcglobal.net writes:
Alan
These adjustable draw latches have worked fine on the R300.
They develop enough force to compress the hatch O-ring. The
hatch seal works fine. The seal does not leak. They do
not have an outside release mechanism other than removing the
viewport retaining ring that is held by a series of allen head
bolts.
On my next boat, I will go with the hatch mechanism similiar to
that used on Deepworker 2000. Cliff
From: Alan James
<alanjames@xtra.co.nz> To:
personal_submersibles@psubs.org Sent: Sun, January 2, 2011 12:50:20
AM Subject:
[PSUBS-MAILIST] Cliff's Hatch Closure Mechanism.
Cliff, if you're about.
I noticed your hatch closure mechanism
seems to be a simple adjustable toggle latch.
I bought a few of these a while back
thinking I may use them.
How have they turned out? Do they exert
enough force? Are you getting any water in?
Also do you have any way of opening these
from the outside in an emergency,
or is
the "Big Hammer" the emergency opening device?
Regards Alan
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