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Subject: 
Re: pneumatic cylinder: why not hydraulic ??
Newsgroups: 
lugnet.technic
Date: 
Thu, 8 Apr 2004 07:21:04 GMT
Viewed: 
2525 times
  
purpledave@maskofdestiny.com (Purple Dave) wrote in
<Hvtrvs.sBv@lugnet.com>:

In lugnet.technic, Harro de Jong wrote:
7. if you used hydraulics, a cylinder would extend or retract fully
with one stroke of the pump.

Not necessarily.  Assuming both cylinders are the same size, a full pump
cylinder stroke will only result in a full working cylinder stroke if
the working cylinder doesn't have significantly more resistance than the
pump cylinder.  If the working cylinder is trying to lift a heavy load,
two or more pumps might be required to generate enough psi to lift the
load.

And where would you leave all that fluid? Fluids aren't compressible (yeah,
they are, but so much less than air that I'm close enough for government
work).


--
Harro de Jong



Message is in Reply To:
  Re: pneumatic cylinder: why not hydraulic ??
 
(...) Not necessarily. Assuming both cylinders are the same size, a full pump cylinder stroke will only result in a full working cylinder stroke if the working cylinder doesn't have significantly more resistance than the pump cylinder. If the (...) (20 years ago, 7-Apr-04, to lugnet.technic)

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