[PSUBS-MAILIST] Hatch mechanisms

Tue Oct 29 12:20:14 EDT 2013

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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>>>
>>>
>>>
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>>>
>>
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