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Mechanics of Steam Engine Governors

Mechanics of Steam Engine Governors

Andrew, Congratulations on your great find! It's a very nice machine and thank you for sharing the videos. Is there any chance that you found that machine in the Blenheim/Shewsbury area? I tried to chase one down in that area about 3-4 years ago. It was advertised on Kajijji but the owner...

Schwing! Coolest project EVER!

SOLD! Thanks to HMEM for hosting the free classified section. :) Gorton O-16A Universal Vertical Milling Machine. Excellent size for a home shop or small garage. Table is 9x24. Motor is a modern Leeson 3/4hp 110/220V currently wired 110v for household current. Comes with a complete set of...

Doh! But only ONCE ::)

I don't know why I didn't think of your Bugatti but it would be a great OHC design to get some ideas from. The head for this little compressor motor should be easier to fit things into: with just one cylinder, I should be able to relocate the spark plug to the back of the head instead of between...

Gentlemen, Thank you for sharing the helpful information. Small motorbike valves will be a good source of parts in this size range, and the guidelines give be a target to shoot for. Thanks also for the reminder about valve lift/overlap/timing issues in hemi-head motors. The engine is for...

Is there a general rule or ratio between displacement and valve size in model IC engines? I have the cylinder and crankcase casting from an old air compressor that I'd like to turn into an IC engine. Throttled carb, dual OHC's, & pressure lube are what I'd like, but maybe I'm aiming too high...

You're both welcome, I'm glad the info was useful. Pat, I happen to have another larger text titled High Speed Combustion Engines by P.M. Heldt, pub. 1944. It has a short chapter titled Conversion of Motion which deals with crank moment, torque diagrams, and piston speed/acceleration. Lots of...

Just a heads-up that I uploaded a scanned copy of "Mechanics of Steam Engine Governors" to the files section. It's a small treatise rather than plans for a particular engine. However, it should have all the engineering info needed to scale down a governor for your application. Enjoy, Bob Farr :)

Gents, I'm sorry to dig up an old thread but I enjoyed this video enough to remember it when I stumbled upon a compressor pump at the flea market last weekend. Lathenut, would you happen to have any detailed pictures of Cedric R.'s engine which you could share? The valvetrain and governing...

Some study has revealed that the expansion ratio of an ignited gas/air mixture is approx 8:1, with diesel mixtures much higher at about 17:1. I'm not quite clear yet whether that 8:1 expansion ratio related to the total physical volume of the entire cylinder (i.e.,125cc in a 125cc motor) or the...

Thanks for the tips and the research links gents. I have a lot of studying to do. Bob

Eventually yes, but I'm thinking of modeling some ideas first. The full-scale machine is my 1974 FLH, so we're talking about a gas engine (CV carb), roughly 14:1 mix ratio, currently an 8.0:1 static compression ratio, single spark plug, hemi-head engine (no squish band). The intake tract is...

I'm trying to improve my basic understanding of cam timing and cylinder pressure (BMEP?) and I'm having a bit of difficulty getting my mind wrapped around it. I know that steam engines rely in part on a predictable rate of steam expansion. I'm curious whether an air/fuel mixture has a...

I'll second that. It's a great third machine, after a mill and lathe. But then, I'm a shaper addict: I have four and hope to add a fifth soon! Just drag it home and ask questions later.

Rijk, Your craftsmanship and attention to detail are an inspiration. Please keep sharing pictures of your progress. Best regards, Bob Farr

Yea, me too, but after shaving a wisker too much off my crank I wanted to hang a similar sign around my neck: "the #@%&* who cut it!" Your V8 is looking great!

Yea, go ahead, I dare you Steve! Cut it you sissy! ;D Bob