[PSUBS-MAILIST] Gamma bow dome

[hank pronk via Personal_Submersibles]

James,
I am just assuming it needs to be perfect ? and I can not imagine that it will not warp at least a small amount.  I am not experienced with how such heavy material will react. Your dome sits on a gasket witch may give you some forgiveness. Maybe Emile can comment having done this also.
Hank--------------------------------------------
On Fri, 2/27/15, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Gamma bow dome
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Friday, February 27, 2015, 7:28 AM
 
 Do
 you need to go to all that trouble?  When I did mine, the
 reinforcing ring was milled flat on the seating surface and
 I just pre-heated it and welded it in.  It was so big I
 don't think there was any distortion and it doesn't
 leak. Just thinking of saving you
 what sounds like an expensive job.
 On 27 February 2015 at
 11:45, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 James,
 
 I am amazed at the equipment some of the big shops have. A
 vertical mill is probably the way to go.  I am checking out
 another option also.  There are machines made to machine
 pipe flanges that clamp on and are portable.  There is a
 company in Calgary that specializes in this. I am just not
 sure yet what the accuracy is yet.  It is nice that I live
 only 3 hr from a big oil town that caters to the oil
 industry.  You can tell that oil is low, and the shops are
 slower.  I ordered the ring on a Friday and it was ready
 Monday.
 
 Hank    --------------------------------------------
 
 On Fri, 2/27/15, James Frankland via Personal_Submersibles
 <personal_submersibles at psubs.org>
 wrote:
 
 
 
  Subject: Re: [PSUBS-MAILIST] Gamma bow dome
 
  To: "Personal Submersibles General Discussion"
 <personal_submersibles at psubs.org>
 
  Received: Friday, February 27, 2015, 4:08 AM
 
 
 
  Hi hank,Sounds like
 
  it will be a good
 modification.  How are they going to
 
  machine the ring?  Some sort of vertical
 
  mill?RegardsJames
 
 
 
  On Friday, 27 February 2015, hank pronk via
 
  Personal_Submersibles <personal_submersibles at psubs.org>
 
  wrote:
 
  Today I
 
  officially took the plunge and removed the forward
 ballast
 
  tank to install my new bow dome.  After much agony I
 
  decided to make the change.  I am not enjoying the sub
 
  because the forward window arrangement is not ideal for
 
  lakes with marginal visibility.  I went to the big
 city
 
  yesterday and picked up the reinforcing ring and should
 have
 
  it fitted in a couple of days.  I am bringing in a
 pressure
 
  welder to weld the ring and then the sub is off to the
 big
 
  city to machine the ring.
 
 
 
  Hank
 
 
 
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