[PSUBS-MAILIST] Elementary 3000 redesign

Mon Apr 10 10:53:18 EDT 2017

Finer grit is always good . As far as polish goes I like to use Novus #2. 

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, April 10, 2017 10:25 AM
 Subject: Re: [PSUBS-MAILIST] Elementary 3000 redesign

Greg,I was a bit impatient I think, and 1500 is not fine enough for my polish.  I have to go to 2000 grit, I use a cheap car polisher with no pressure.  Hank 

    On Monday, April 10, 2017 6:54 AM, james cottrell via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,It is possible to take out a shallow scratch without distortion but it takes a lot of work. If the scratch was near the center, it can be wet sanded with a pneumatic orbital sander feathering the surface out. Basically spread the sanded area over the whole surface. Use finer and finer wet sand grits till you reach 1500 then hand rub it clear. Avoid machine buffing because of heat. 
If the scratch is deep or off center then you'll have to turn the whole surface then wet sand/ buff and anneal.
Greg

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, April 10, 2017 5:05 AM
 Subject: Re: [PSUBS-MAILIST] Elementary 3000 redesign

Greg, I did learn a lesson with my port.  I had a small scratch in the outside face, so I  sanded it out and polished it.  Now I have this small distortion in that spot.  I sure doesn't take much for that to happen.  I am wondering if I should leave it alone for fear it is like shortening a leg on a chair.Hank 

    On Sunday, April 9, 2017 8:38 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hi Greg,The view through the conical port is ridiculously good actually.  In the original location, I could see right in front of the sub, so I am willing to loose a bit of the view in front.  I need to experiment more to get the perfect balance.  My original sphere sub had a 24 in dia 4 inch thick port, so needless to say it was awesome. The comfort was very good because I could sit back without leaning ahead.   Hank 

    On Sunday, April 9, 2017 7:35 PM, james cottrell via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hi Hank,
If I understand your email correctly, the only problem you will have is reduced view of the bottom since your port will be higher and angled slightly up during the dive. I ran into the same thing when laying out the side viewports for my sub- the ports needed to be comfortable to look out of and still give a good view downward. Captain Kittredge made the ports for me and made them extra heavy so they could be welded in "angled down" without losing too much strength. The view turned out to be pretty good.
Just curious- how was the comfort/ view in your previous spherical sub compared to the new sub?
Greg C

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Sunday, April 9, 2017 11:41 AM
 Subject: [PSUBS-MAILIST] Elementary 3000 redesign

Hi All,I made a BooBoo when I designed Elementary 3000.  I did not spend enough time mocking up the port position for comfort.  With the current port location in relation to the hatch, it is uncomfortable.  If I raise the port 10 inches by rotating the sphere it is comfortable.  I can lean forward easily and look out the port in this position.  This means my hatch would be  off level  at the surface.  Does this matter?  it is better for staying open I guess.  The back of the land will be 3.5 inches lower than the front.  I am building a new body for the sphere to sit in-it will look more like a Square plastic ROV now than a submarine.  I got the idea at Nuytco and actually commented to Phil that  you could drop a sphere into the centre of their ROV and you would have a great sub.   My plan is to have two MBT's, one for and one aft inside the plastic panel enclosure.  If I make the aft MBT larger in volume, the sub will float at the surface with the hatch level to the water.  When I sink the sub it will be off level with the pilot sitting level with the port where it needs to be.  I am using plastic dock floats for MBT's.That should work Hank
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