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Here is a video of it running on compressed air at 40 psi but with a 1/4 air hose (try running breathing through a straw...) Works ok, can't find where the little ka-klunk sound comes from, you can hear it a bit during the second half of the video I used a 5" lathe chuck as a fly wheele (looks...

Hehe, Ladies of my age (23) aren't much impress by those chunk of steel leaking oil on which we spend all our spare time... Wish some of them were ! This is my 4th steam engine; first one was a single acting wobbler 0.5" bore, build with less than nothing -press drill/hammer/bigger hammer- but...

Hi all, This is a compound steam engine I started a while ago. Few specs before the pictures; Hp cylinder bore : 1.75" Lp cylinder bore : 3.5" Stroke : 3" Designed for 500 rpm. No casting, steel and bronze construction. Needle or roller bearing where possible, assembled crank. Valve design from...

Sorry guys, I mixed exhaust lap and cut-off on my reply, might mixed you also and just made me feel stupid as I read my own reply... :-[ Now you know this, my last reply might have more sense... hopefully Deckel

I love it ! Yes, ultimately it might be for a small boat (which my father would love to build, already done a wooden canoe) and if the boat takes too long to build, I might use the engine on a mower tractor, could be fun. Honestly, the specs of my engine were determined by doing an average of...

Thanks guys Steamer, can you tell me more about the condensate drains or give a link if it has already been discussed on the forum. The engine I am working on is a double acting compound 1.75+3x2 ( or so, still thinking ) slide valve with Stevenson linkage for reverse. Deckel

Hi all. I tried to find some info about clearance between piston and cylinder head at TDC but no luck. I guess cylinder ports size/position may affect the clearance and whether or not the engine uses exhaust lap. Is there's any rule of thumb for this or some engineering must be done before...

Hi all, I had some time to look at these diagrams which I start to understand (barely). Did I missed something or the info we got tells how to do these diagrams in order to find lead angle, eccentrics position on crank, but never how to determine what lead, lap, cutoff should be used ? Also, it...

Thanks for the replies guys Just wanted to say the book I was reading is " modern steam engines " by Joshua Rose Written in 1887, and as gbritnell mentioned, these engines really weren't just big piles of twisted steel, and the engineers behind them were completely amazing. Considering they...

Hi all I was reading a book on steam engines (most of their examples were pretty big, around 25in piston diam...) and they were explaining how does steam/exhaust lead/lap work, also some design of double ported slide valves, the relation between valve and piston speed with different linkages...

Thanks for the "imaginative" comment, I take is as a compliment, I think I did pass more hours on the computer designing it than actualy building it, but that's part of the fun !

Here is a end view of all planes (end plate - white lines, hp cylinder - blue lines, lp cylinder - red lines) Sorry for the low distinction between colors, this is a screenshot of cad, and that's how it came out... First air goes in the end plate, splits in 2 (double acting..), fill the hp...

Hi all This is one of the few (3, one is dead, the other close to be...) steam engine (that never really ran on steam, just air) I build. This one is a double acting compound engine that I designed. ( the others engines are personal design too, never worked with plans for engines, yet..) Here...

Hi all, I'm new here and to steam engines too I did 2 "steam" engines earlier that I never tried out on real steam, but that runs nice on compressed air ( I'll try to take some pics and videos) I use to work with some rubber seals but now I am working on a new project (double acting, double...