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yes, electronic ignition with Hall sensor (Rxcel or the likes) is a neat solution, but if you are in a vintage mood, you may found easily on ebay new contact breaker for moped or motorcycle or car, complete, with spring, isolated breaker arm and tungsten points that you install in such way that...

I also did this engine years ago, a very fine runner, with a simple alcohol burner. very well drawn and clear instructions in the text. This is an efficient and simple to build engine that works very well. It uses a variable crank, similar to the fast return mechanism of a shaper, a clever...

I can't believe that a fellows building a triple expansion engine don't have the skill to build a little boiler such this one...which would animate a large engine at a nice pace with a simple alcohol burner with 3 wicks. I suggest a more powerful burner, to limit the condensation of steam in the...

a coal burner simply because it is more realistic, particularly with a "high level" engine as the triple expansion, nothing can beat a roaring bed of red glowing coal... but obviously at shows and get together, I prefer a butane burner, far more practical, and allows to chat with visitors !

yes, the Harris book is a must. the bore and stroke of the high pressure cylinder only will give you the required amount of steam per cycle, as it is a triple expansion engine, knowing this figure, you calculate the amount per min according to the rpm, about 500 for such large model. this gives...

one of these cheap RC power panel will show you immediately how much amp your set up requires... so confortable ! https://www.google.fr/search?q=rc+powerpanel&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjarpPuwMXnAhVM4YUKHW4mA70Q_AUoAnoECB8QBA&biw=1366&bih=642

These are latest version of the .049 cox, with the 2 exhaust slots, and I wonder how this setup improves the running ? if somebody has a clue...

the Westbury "Kestrel" 5cc 2 st engine has an admission through rotary valve in the front of the crankdisk, obviously identical to a rear one ! and its "Zephyr" 2.5cc as a rear valve, but I didnt see the plans http://www.modelenginenews.org/etw/2s/index.html this picture summarizes what is...

the small steam cleaner you mention gives ample steam output for a little engine, and for a larger one too, 50psi as you mention is quite enough. a little wobbler well made would run by blowing with the mouth...

Great success with this temperamental runner, very instructive build, thanks to share. Kudos, Gerard !

Yes its a pity that there is no following episode to this quite interesting thread. I did too 3 "Cracker" locos, very funny and easy to build, particularly if one follows the above thread ! but personally, I would stay on the original gas burner or a pencil torch burner rather than the alcohol...

Yes, it helps a lot to preheat the engine with the hot air gun... this problem with condensation is something well known and often discussed... you're not far from a good runner !

wow, you have got it, nice ! congratulations ! the engine stops when starting from cold as water from the combustion condenses inside, and increases drag, this is usual... once the temperature of the engine reaches its running temp, in 2-3 min, the engine runs indefinitely....

Looking at the video on post #172, I feel that movements are not free enough, we also hear the friction noise ( the valve and the spring?) that you have to fix...hidding the popping and farting noises, you must have !

Flame positions is not that crucial, as they run with an hot air gun... and concentrate your efforts on the mechanics, no binding at all, no tight spot, it is mandatory ! you will feel easily when you have got it IMO, up to the point where, as in above video, you fell free bouncing and compression.

Nice job Gégé89, congrats, Bravo !

a very interesting thread ! very nice build. Well, you almost got it, a little too much drag maybe, and some leaks in the valve you have to feel the vacuum or compression easily for an immediate start of the engine. this is the link for one of my album on googlephoto, where you can see some of...

Neat work all along the build, spotless job, congrats...

With these plans, before cutting metal, it is wise to check all dimensions for interference, ie piston hitting top or bottom cover and so on, it may involve some redrawing...

workmanship and attention to detail at its highest, an awsome built, congrats... thanks to share pictures!