[PSUBS-MAILIST] new submarine inside to outside hydraulic

["Carsten Standfuß "]

Oh boy - so genius simple.. :-) 

vbr Carsten 

"Dan H." <jumachine at comcast.net> schrieb:
> How to solve the problem of depth figuring in on the situation is to use 
> double ended cylinders. With a rod of the same size sticking out of each 
> end of each cylinder the effect of water pressure balances out. The force 
> is the same in either direction.
> 
> Dan H.
> 
> ----- Original Message ----- 
> From: "hank pronk" <hanker_20032000 at yahoo.ca>
> To: "Personal Submersibles General Discussion" 
> <personal_submersibles at psubs.org>
> Sent: Saturday, April 12, 2014 8:58 AM
> Subject: Re: [PSUBS-MAILIST] new submarine inside to outside hydraulic
> 
> 
> Hi Carsten,
> I am not sure about your math, I get a much different figure.
> A 1/2 in rod has an area of .19in
> multiply by 1,000 foot depth salt water 445psi = 87.33 lbs
> With a 10 to 1 lever that would be 8.7 lbs to push with your arm.
> Also you want a smaller cylinder inside with a longer stroke and you get an 
> even lighter load on your arm.
> Hank
> 
> Subject: Re: [PSUBS-MAILIST] new submarine inside to outside hydraulic
> To: "Personal Submersibles General Discussion" 
> <personal_submersibles at psubs.org>
> Received: Saturday, April 12, 2014, 2:56 AM
> 
> 
> 
> 
> 
> E-Mail Software 6.0
> 
> Hi Scott,
> 
> 1 bar = 0,1
> N/mm2
> 
> 1000 meter depth = 100 bar or 10 N/mm2
> (or 1
> kg/mm2)
> 
> A Hydraulic stamp of a 1/2 inch has a surface of 126
> 
> mm2
> means the outside waterpressure on the cylinder stamp is
> 1267
> N or
> 127 Kg or 0,13 ts.
> 
> If you make a drawing of your schematic you
> will see
> that it is not selfcompensating.
> Means you need a inside force of
> that
> amout just to compensate.
> If you asume you can take a pressure
> of 0,013
> ts
> with some comfore by hand you inside zylinder piston has to
> be
> the 10
> times more diameter thn the outside one.
> 
> By the way the same
> force works
> on your troughulls cables of the same diameter.
> 
> vbr Carsten
> 
> 
> 
> 
> <swaters at waters-ks.com> schrieb:
> 
> I have a question maybe someone can answer.
> If you have two hydraulic cylinders that are completely
> filled with
> oil (no air pockets anywhere in the system) one in a
> submarine and on
> outside of a submarine. Each cylinder has the rod side
> connected to the
> head side of the other cylinder so when on rod extends, the
> flow of one
> makes the other cylinder do the same exact thing. Would the
> one cylinder
> that does the same as the other cylinder on the surface
> function the
> same way at depth? Or would the deeper you go the more force
> you would
> have trying to push the rod into the cylinder?
> 
> Thanks,
> Scott Waters
> 
> 
> 
> 
> -----Inline Attachment Follows-----
> 
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