you read it right im going to convert an os .18 to steam.
i know it wont be usable for anything, much than a working
model but i have a couple of these lying around and saw
a weed eater on the net converted to steam.

anyway i need someone who knows anything about the timing
of this motor and what i might need to block off to get it going.
it should work, i have released the crankcase pressure and am
working on a flywheel.

if anyone has any knowledge of steam or has done something similar
i would like to hear from you. i had the parts sitting here and am fascinated
with having a motor run on steam. maybe im a nutter? lol.

comments welcomed.
cheers.

motors origin-


motor stripped with proposed flywheel-

Go to Google and put in "Steam Engines". There is a lot of "FREE" plans available which discuss timing and other items. Keep us posted. Flathead

Oh dear!
Low rpm small displacement engines on steam never quite made it beyond the showbench. For simplicity, you could use the CO2 engine principle with a piston operated steam admittance valve. There would be uniflow, and least pre-condensation/after-evaporation problems. Apart from that, it would only require a new head and plumbing, with open crankcase and occasional drop of oil to the rod/shaft.

It can't be that hard. ..... If you put compressed air in the glow plug hole it will spin.

Ya a half of a turn. Pe is on the right track, check out the operation of the small CO2 motors

ok i have found myself that i dont need to block anything.

yes it only spins half a turn. but with a flywheel, and no crankcase
pressure it will return to the top if the air/steam injection is timed.

i have fitted the flywheel and made a timed valve that will get air
or steam in just after TDC. one quick punch of gas. i have also drilled
out a glow plug and just need to work out the plumbing.

after sitting down with this little motor and blowing through a fuel line
into the spark hole ( compressor isnt with me) i reckon it should work.

i appreciate the comments
i will try to search what i can, more info would be great.
cheers again.
monster.

http://www.animatedengines.com/co2.shtml

cool link. that, as far as i know is the bash valve idea. not bad
if you wanna go screwing with the piston. i just drilled and screwed
a dome head screw into the flywheel, and made an arm to hit it from
an old servo horn, works like a charm.

just thinking about the plumbing and getting my compressor back.

heres a little video showing the valve i made moving, before i soldered
on the connections. the quality is poor but if you look closely you can see
the valve moving up an down in that little hole.

http://www.youtube.com/watch?v=uFDjBQ7OkI8

im thinking of drilling out the head and re tapping it for something bigger
were the plug went, but am unsure. some stuff to think about.
cheers.
monster.

A teflon valve in the head, with small stem toward the piston crown for piston operation would be much less complex.