Posted by Gordon on June 22, 2011, 9:10 pm
85ec6ad8277b@v10g2000yqn.googlegroups.com:
>> ...>
>> There is this old style steam engine that is a large water jacketed
>> cylinder. steam is introduced and pushes the piston up. When the
>> piston reaches top, the steam is cut off. The steam in the cylinder
>> is condensed by the water jacket which causes the piston to move down.
>> and the cycle repetes. IT could be home built, and the low presures
>> involved would be a lot safer to deal with.
>> ...
>
> That's a Newcomen or atmospheric engine. The efficiency is very low
> unless you can heat your house with it, and they are quite large for
> the power produced.
Indeed. But the OP said he had access to plenty of free waste wood
to use as fuel.
> http://en.wikipedia.org/wiki/Newcomen_steam_engine
> Since the boiler isn't pressurized they are safer than Savery's
> earlier steam pump. This type of steam engine lasted 100 years until
> metalworking techniques improved enough to permit higher operating
> pressures.
Low presure. That's what makes it a good candidate for a DIY project.
>
> jsw
>
Posted by Jim Wilkins on June 23, 2011, 11:13 am
> ...>
> >http://en.wikipedia.org/wiki/Newcomen_steam_engine
> ...
> Low presure. That's what makes it a good candidate for a DIY project.
Also it has big, slow-moving parts and lots of monkey motion in the
valve gear to impress visitors. Good DIY projects can double as
performance art.
jsw
Posted by Winston on June 23, 2011, 6:40 pm
Jim Wilkins wrote:
>> ...>
>>> http://en.wikipedia.org/wiki/Newcomen_steam_engine
>> ...
>> Low presure. That's what makes it a good candidate for a DIY project.
> Also it has big, slow-moving parts and lots of monkey motion in the
> valve gear to impress visitors. Good DIY projects can double as
> performance art.
A machine like that is one step removed from the real show then.
:)
--Winston <--has big, slow-moving parts and lots of monkey motion
Posted by Jim Wilkins on June 23, 2011, 11:07 pm
Posted by Winston on June 24, 2011, 2:18 am
Jim Wilkins wrote:
(...)
A stunning achievement.
--Winston
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>> There is this old style steam engine that is a large water jacketed
>> cylinder. steam is introduced and pushes the piston up. When the
>> piston reaches top, the steam is cut off. The steam in the cylinder
>> is condensed by the water jacket which causes the piston to move down.
>> and the cycle repetes. IT could be home built, and the low presures
>> involved would be a lot safer to deal with.
>> ...
>
> That's a Newcomen or atmospheric engine. The efficiency is very low
> unless you can heat your house with it, and they are quite large for
> the power produced.