[PSUBS-MAILIST] Heads Question

[David Colombo via Personal_Submersibles]

Hank,
Surprising it appears the ellipse head is the same weight as a hemi. The
displacement however is  7.068 cf / 452# of lift for the hemi, vs 189+# of
lift for the ellipse.  I suppose the extra volume would allow me to add
more battery weight though. Hmmm

Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com


On Sat, Sep 16, 2017 at 10:12 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> David,
> I think I paid around 600 dollars Canadian for my 36 inch hemi heads.  Why
> are you not using hemi heads instead of dished?  You can save weight and I
> bet that is important in your sub.
>
> Hank
> On Saturday, September 16, 2017, 10:17:08 AM MDT, David Colombo via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi Alec,
> I just spoke with the company that Roberto mentioned here in California to
> place an order for dished head for the SeaQuestor. I will be using the
> 36"OD x .375 A516-70 steel what they call Elliptical 2:1 Ratio ASME Code
> Type. It comes with a 2" flange which is really a 36" od ring shape as part
> of the forming. This would mate up to the 36"OD first hull section. I'm
> thinking that this would give me the best welding condition with two
> matched surfaces that I would bevel for full pen welding. I'm curious why
> not to have the flange?   My cost here is $480.00 + $96 to have it shipped
> to northern California from southern California. even though its only a
> nine hour drive one way, I think my time would be worth more than $5 hr to
> pick it up. LOL Unless of course its cheaper in Canada (Hank), I might make
> the trip and could serve as support crew for the Gamma. Any thoughts out
> there from fellow Psubers would be appreciated.
>
> Best Regards,
> David Colombo
>
> 804 College Ave
> Santa Rosa, CA. 95404
> (707) 536-1424
> www.SeaQuestor.com
>
>
> On Fri, Sep 15, 2017 at 2:28 PM, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Ugh, mental typo. I meant "un-beveled" and "bevel them yourself", not
> "un-flanged" and "flange them yourself".
>
> !!!!!!!
>
> On Fri, Sep 15, 2017 at 5:25 PM, Alec Smyth <alecsmyth at gmail.com> wrote:
>
> Hi Roberto,
>
> I believe the short description for what you need is flanged, beveled, and
> code. You could get them unflanged, but it takes quite a while to make a
> flange with an angle grinder. The flanges if I recall are 2". Do set up a
> project page or something so we can follow progress!
>
>
> Best,
>
> Alec
>
> On Fri, Sep 15, 2017 at 5:07 PM, roberto alvarez via Personal_Submersibles
> <personal_submersibles at psubs.o rg <personal_submersibles at psubs.org>>
> wrote:
>
> Hi, lost the plans cd for the k250, i am  interested in the  head
> selection, i found a seler in california and have
> flanged ,beveled ,code, non code,
>
> Will apreciate your support in this ( until i found the plans cd )
>
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