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#Post#: 994--------------------------------------------------
About the Simplest Engine There Is
By: lynx wind Date: December 9, 2013, 8:07 pm
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I have studied steam engines for a long time. There just isn't
a simpler way to make a useful engine than Elmer's H-Twin
HTML http://www.john-tom.com/ElmersEngines/09_Htwin.pdf
HTML http://www.john-tom.com/ElmersEngines/09_Htwin.pdf
HTML http://www.john-tom.com/html/ElmersEngines.html
HTML http://www.john-tom.com/html/ElmersEngines.html
This engine could be made with some short cuts and still work.
It is a "Wobbler" oscillating engine. The design shows 1" D
pistons. If you sneak it up to 1.25" D and keep the short
stroke you would have a powerful high rpm engine on a safe low
pressure steam pressure of 20-40 psi. This engine could drive a
small alternator to yield 1/4 HP or about 200 watts. The boiler
could be quite simple too.
HTML http://www.youtube.com/watch?v=SwFkQJmAG2s
HTML http://www.youtube.com/watch?v=SwFkQJmAG2s
#Post#: 1000--------------------------------------------------
Re: About the Simplest Engine There Is
By: crazyguy Date: December 10, 2013, 9:04 am
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That's real nice, but I don't understand the valving
arrangement. Where are they? I see no rods or anything to
operate the valves.
#Post#: 1002--------------------------------------------------
Re: About the Simplest Engine There Is
By: lynx wind Date: December 10, 2013, 10:10 am
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The flat faced cylinder has a port near TDC. This port is about
3/16" D and lines up with a port drilled into the face of the
bulkhead after TDC when the cylinder is moving past centerline.
The geometry is tight. Just past BDC the cylinder rotates the
other way and the port lines up with an exhaust port drilled
into the bulkhead.
If you look at the geometry of how this works it is quite
amazing.
No need for valve linkage, no eccentric, no wrist pin in the
piston. The only drawback is there is steam leakage from the
cylinder and around the two mating surfaces of the cylinder and
the bulkhead. Its not too bad considering the simplicity.
Some of these engines are made from bent sheet metal and brass
plumbing nipples.
#Post#: 1004--------------------------------------------------
Re: About the Simplest Engine There Is
By: crazyguy Date: December 10, 2013, 2:15 pm
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Aha !!..... I found the innards.
HTML http://youtu.be/mpmfAx5d-54
#Post#: 1007--------------------------------------------------
Re: About the Simplest Engine There Is
By: lynx wind Date: December 10, 2013, 8:08 pm
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Here's another example of a larger engine, and a nice
explanation and how to below
HTML http://youtu.be/606D-KOuee0
HTML http://youtu.be/606D-KOuee0
HTML http://youtu.be/Tjl7Zp4gkP0
HTML http://youtu.be/Tjl7Zp4gkP0
#Post#: 1009--------------------------------------------------
Re: About the Simplest Engine There Is
By: crazyguy Date: December 11, 2013, 10:23 am
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I like how they all work except you never see them running on
steam, just air. Mechanically I guess they all function great
but steam is a whole other animal. If you could make steam dry
then I guess it would be ideal , but all those youtube videos on
"steam engines" that are demonstrated running on air is
misleading.
IMHO
#Post#: 1010--------------------------------------------------
Re: About the Simplest Engine There Is
By: lynx wind Date: December 11, 2013, 11:25 am
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I only run mine on steam and I showed a recent video of the PM
research 2A running on steam. I agree, too few people ever
bother to run with steam and actually these engines run better
on steam, because they are designed as heat engines and the
steam will collapse whereas all that air has to push out.
#Post#: 1016--------------------------------------------------
Re: About the Simplest Engine There Is
By: burnit0017 Date: December 11, 2013, 6:00 pm
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Hi, do have any suggestions for a low cost fly wheel? The only
thing I can find is a 5 pound weight from WalMart. I still have
to find a way to add a hub.
#Post#: 1018--------------------------------------------------
Re: About the Simplest Engine There Is
By: crazyguy Date: December 11, 2013, 7:27 pm
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how about a wagon wheel with a hard rubber tire on it?
wheelbarrow wheel etc.
#Post#: 1021--------------------------------------------------
Re: About the Simplest Engine There Is
By: burnit0017 Date: December 12, 2013, 2:51 am
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HTML http://www.pmmodelengines.com/shop/gas-accessories/flywheel-castings/
possible source for fly wheel, unfinished and requires
machining,, is bigger better?
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