[PSUBS-MAILIST] reinforcement

[Alan via Personal_Submersibles]

I'm here Pete,
also wondered if I had dropped out of the loop.
Hope the hand's not too bad Hank. I have part of a finger missing;
a set of metal rollers won that battle!
Been doing an on line ladder logic programming course to give me some
wisdom as to what plc to buy & what inputs I should be sourcing it.
Alan

 

Sent from my iPad

> On 22/11/2017, at 1:30 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Yes Pete, still here ;-)  been nursing an injury to my hand, hand versus mitre saw cutting aluminum for my manipulator.  Hand lost the battle. ;-(
> Hank
> 
> On Tuesday, November 21, 2017, 4:33:50 PM MST, Pete Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Been quiet for a week now anybody home ?
> --------------------------------------------
> On Tue, 11/14/17, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Subject: Re: [PSUBS-MAILIST] reinforcement
> To: "Sean T. Stevenson via Personal_Submersibles" <personal_submersibles at psubs.org>
> Date: Tuesday, November 14, 2017, 7:09 PM
> 
> 
>             Thanks' Sean,I will add
> thickness to the ring,  for a bigger comfort zone.  The
> flat plate is original to Gamma so no worries about it
> failing.Hank
> 
>             
>             
>                 
>                     
>                     
>                         On Tuesday, November 14, 2017,
> 5:53:37 PM MST, Sean T. Stevenson via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
>                     
>                     
> 
>                     
> 
>                     If you
> were to meticulously torque the bolts to a sufficient
> preload to ensure that the connection could reliably carry
> shear forces, then technically it would carry some load;
> however, it is unwise to rely on that for the purpose of
> determining required penetration reinforcement - certainly
> if the forces are transferred entirely in shear. If instead,
> the plate was loaded in radial compression (i.e. inset into
> the seat and bearing on the outer cylindrical surface), then
> there would be some direct load transfer, but the exercise
> is academic.  As with an acrylic window, design the ring
> under the assumption that the seat ring and associated
> reinforcement must carry all hull stresses. The flat plate
> that bolts on should then be designed in accordance with the
> rules for unstayed flat heads (ABS Steel Vessel Rules).
> 
> Sean
> 
> 
> Sent from ProtonMail mobile
> 
> 
> 
> -------- Original Message --------
> On Nov 14, 2017, 15:43, hank pronk via
> Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> HI Sean,I am
> taking your suggestion and ordering a heavy ring to mount my
> motor assembly to rather than use the original pipe
> assembly.  .  It will be like a port frame but with a
> 5\8 steel plate with a prop shaft tube weld to the
> centre with giant gussets.  Normally I would weld in a ring
> that is several time heavier than it needs to be, but in
> this case I can not get crazy with weight.  The weight is
> important because it is still an escape pod.  I have sized
> the ring to be 20% heavier than the material removed from
> the sphere.  I am assuming that the 5\8 plate that is
> bolted to the ring adds support to the ring.  I realize the
> added plate is only as strong as the bolts securing it, but
> there must be a benefit, or does this not
> count? Hank_______________________________________________
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>                 
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