[PSUBS-MAILIST] dome mount

[James Frankland via Personal_Submersibles]

Hi Hank,
How was the alu ring attached to the 2" reinforcing ring before you added
the studs?  I think its time for some picture updates on your page... :)

Kind Regards
James

On 22 April 2015 at 18:07, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>
> Emile,
> I am pulling pretty hard on the straps because the dome is 150 lbs on its
> own.  Also I am relying on the EPDM to seal at the surface.  I could have
> put more bolts in the AL ring also but this way I don't have to worry about
> pulling the treads out of the AL.  I used the AL you suggested when I asked
> James.
> Hank--------------------------------------------
> On Wed, 4/22/15, Emile van Essen via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>  Subject: Re: [PSUBS-MAILIST] dome mount
>  To: "'Personal Submersibles General Discussion'" <
> personal_submersibles at psubs.org>
>  Received: Wednesday, April 22, 2015, 9:26 AM
>
>  Which Alu? Yield varies
>  from 100 to 450 N/mm2
>  AW 5083 or Anodised
>  AW6082 is the best for domerings in my opinion.
>
>  Emile
>
>  -----Oorspronkelijk bericht-----
>  Van: Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org]
>  Namens hank pronk via Personal_Submersibles
>  Verzonden: woensdag 22 april 2015 13:50
>  Aan: personal_submersibles at psubs.org
>  Onderwerp: [PSUBS-MAILIST] dome mount
>
>  I had a design problem with my
>  AL dome seat.  I had the strap assembly
>  bolted to the AL seat only, and that was a
>  mistake.  After installing the
>  dome
>  assembly on the sub I double checked the fit and found that
>  when I
>  tighten the straps the Al seat was
>  distorting.  I am not very experienced
>  working with large AL material and did not
>  realize how Whimpy it is.  I
>  corrected this
>  by drilling through the AL and into the 2in thick
>  reinforcing
>  ring and installing studs.  Now
>  the strap assembly pulls from the steel
>  ring.  I simply tighten the strap assembly
>  until I see an even impression in
>  the EPDM
>  gasket.  I am now reassembling Gamma, I am excited to get
>  back in
>  the water and try out my dome.
>  Hank
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