[PSUBS-MAILIST] Hatch mechanisms

[James Frankland]

slightly lower seat!

On 30 October 2013 11:40, Joe Perkel <josephperkel at yahoo.com> wrote:

>   Speaking of this hatch issue, would all this extra hardware present a
> head butting problem? How to deal with that? A more dished profile, or a
> slightly taller conning tower?
>
> Joe
>
> Sent from Yahoo! Mail for iPad
>
>  ------------------------------
> *From: *James Frankland <jamesf at guernseysubmarine.com>;
> *To: *Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>;
> *Subject: *Re: [PSUBS-MAILIST] Hatch mechanisms
> *Sent: *Wed, Oct 30, 2013 10:06:59 AM
>
>   Hank,
> How does the mechanism work?  turning the wheel obviosly lifts the ends
> under the hatch lip.  Dont suppose you have a dwg?
> Regards
> James
>
> On 29 October 2013 18:15, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>
>>   Jim,
>> that is exactly what I did with my k350 hatch.  I didn't have tie rods
>> yet so I put adjusting bolts in the dogs.  I intent to change to tie rods
>> from go carts.  This is very easy to build.  The slide system is the
>> easiest to fabricate though and less complicated.  Gamma has slides.
>> Hank
>>
>>   *From:* James Frankland <jamesf at guernseysubmarine.com>
>> *To:* Personal Submersibles General Discussion <
>> personal_submersibles at psubs.org>
>> *Sent:* Tuesday, October 29, 2013 10:20:14 AM
>> *Subject:* Re: [PSUBS-MAILIST] Hatch mechanisms
>> **
>>  Hi Jim.  I reckon i took that picture!  unless you took one almost
>> exactly the same!  Its the lanzarote sub i think, i remember sending it to
>> someone, Brent i think.
>>
>>
>> **
>>
>>  On 29 October 2013 14:38, <jimtoddpsub at aol.com> wrote:**
>>
>>   On this hatch mechanism the dogs pivot instead of sliding.  The
>> arms are threaded to adjust  the length turnbuckle style.
>>
>> [image: CIMG3887.JPG]
>> For sliding dogs, beveling them where they contact the latch point allows
>> them to progressively tighten as they move into place.  The latch points on
>> the tower should either be replaceable or have replaceable wear plates.
>> That also allows you to change the thickness of the wear plates in order
>> to adjust the pressure of the hatch to the landing.
>> -Jim
>>  -----Original Message-----**From: James Frankland <
>> jamesf at guernseysubmarine.com>**To: Personal Submersibles General
>> Discussion <personal_submersibles at psubs.org>**Sent: Tue, Oct 29, 2013
>> 6:53 am**Subject: Re: [PSUBS-MAILIST] K-350 Mods****
>> anything like that would be ok by the looks of things.  That one is good
>> because it only requires one through hull.****
>>  On 29 October 2013 11:25, Joe Perkel <josephperkel at yahoo.com> wrote:**
>>
>>   James,
>>
>> 2400 series, look for drawings at bottom of page for that series. The
>> cast hatches are of no value to us but the mechanisms I believe are.
>>
>>
>> Joe
>>
>> Sent from Yahoo! Mail for iPad
>>  **
>>   *From: *James Frankland <jamesf at guernseysubmarine.com>; ***To: *Personal
>> Submersibles General Discussion <personal_submersibles at psubs.org>; ***
>> Subject: *Re: [PSUBS-MAILIST] K-350 Mods ***Sent: *Tue, Oct 29, 2013
>> 11:15:49 AM **
>>  **
>> I cant see the one you mean Joe, is there a product number?
>>
>>  On 29 October 2013 10:54, Joe Perkel <josephperkel at yahoo.com> wrote:**
>>
>>    James,
>>
>> Ive given thought to the hatch in the past, take a look at freeman marine
>> and look at the cam mechanism with dogs,
>> http://www.freemanmarine.com/ProductsHatches.htm
>>
>> Could not a rotating shaft pass through the center to both sides via same
>> thru-hull as side thrusters, with a wheel on both sides and a similar
>> cam mechanism on the inside? Upward Port moved a bit forward then, and
>> beef up the hinge for extra weight as you said.
>>
>>
>> Joe
>> **
>>    *From:* James Frankland <jamesf at guernseysubmarine.com>
>> *To:* personal_submersibles at psubs.org; PSUBS Member Discussion Group <
>> member-forum at psubs.org>
>> *Sent:* Tuesday, October 29, 2013 5:55 AM
>> *Subject:* [PSUBS-MAILIST] K-350 Mods
>>   **
>> Jon\Joe sent a message yesterday i think regarding suggested K-350
>> modifications.
>>
>> I would suggest these as critical.
>>
>> 1.  Hatch.  Opening from both sides.  Worst part of the design I think.
>>
>> 2.  Hatch bracket.  Could do with beefing up, it feels a bit flimsy.
>> Probably could do with some traingular flanges welding on.
>>
>> 3.  Variable tank mounting.  The way the tank mounts is awkward and
>> doesnt allow any adjustment.  Much easier and better would be flat
>> horizontal brackets welded to the battery pods that join to corresponding
>> flat brackets on the vbt.  Slotted holes on one of the planes would allow
>> the tank to slide forward and back a little to allow that awkward vent to
>> be fitted easily.  Also the tank could be just lifted up and on.  Very
>> simple change.
>>
>> I think other than that, other modifications are depending on how much
>> trouble you want to go to and cosmetics.
>>
>> For example,
>>
>> I changed the battery pod endcap seals.  I had a real pain trying to make
>> them as per the plans.  The way i did them in the end with flanges was a
>> lot easier.  But probably nothing wrong with the original design.
>>
>> Skids.  I didnt like the ones shown, they would just get all the paint
>> knocked off.  Again, probably nothing wrong with the original design.
>>
>> I made all the flanges and protrutions from stainless.
>>
>> Electrical penetrators added to the battery pods to eliminate the ones
>> shown on the plans.
>>
>> The 2 extra downward facing viewports i put in are really good.  You
>> could do away with the ones at the back and put them there instead if
>> you didnt want to make too many.
>>
>> The dome of course.
>>
>> Overpressure valve.
>>
>> loads of little modifications.
>>
>>
>> I'm at work, and i better get on with some of it, instead of daydreaming
>> about subs!
>> Kind Regards
>> James
>> **
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