The Unofficial Mamod and Other Steam Forum

SlideValve · Last edited by SlideValve on Fri Nov 06, 2009 11:42 pm; edited 1 time in total

Hi, on my homemade steam engine before it had a wooden flywheel, which worked fine at high speed, but couldn't idle very well, so i replaced it with a very beefy solid steel flywheel, the flywheel orginally had a 1/2 bore hole with a set screw, luckily i had a piece of copper that was 1/2 in. outside and press fit nicely, and slightly undersized 1/4 in inside diameter . I drilled it out with my small lathe ( Pictures later today) here are the pics.

before

After

Since the flywheel already had a set screw, and the 1/2 in. part of the copper was only 1/8in thick, i could still use the set screw because the the flywheel was tapered slightly enough so the set screw would clear the copper. The engine idles beautifully now

and because the exhaust in fairly long it has an awesome sound

I'm going to need to add an extra bearing to the thin piece of brass so it doesn't wear out. This week is a 3 day weekend so i'll have some vids of this engine soon

Connor

igy569 · Posted: Fri Nov 06, 2009 10:43 pm Post subject:

Cool stuff. Love seeing what others are up to...

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SlideValve · Posted: Fri Nov 06, 2009 10:49 pm Post subject:

Thanks, the engine is pretty small 1/4 bore 5/8 stroke, basically same specs as a Wilesco d6. On this engine i did something different, the hole in the steam chest, were the tubes are soldered, the holes are 5/64, but on the cylinder the hole is 3/32, so the cylinder intakes %100, and exhaust %100 because it overlaps. This think fly's on live steam, and is fun to watch

IndianaRog · Posted: Fri Nov 06, 2009 10:56 pm Post subject:

Connor, my hat's off to you...not many of us can build an engine from scratch...I sure can't!!!

Well done!
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SlideValve · Posted: Fri Nov 06, 2009 11:04 pm Post subject:

Thanks, the hardest part was soldering the the pivot point straight, without de-soldering the cylinder, and keeping the cylinder flat as possible for a seal. It was very frustrating, but it was well worth seeing it run

johnreid · Posted: Fri Nov 06, 2009 11:23 pm Post subject:

Ingenuity pays, that is turning out nicely.
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27ace27 · Posted: Fri Nov 06, 2009 11:31 pm Post subject:

I know I've seen this one before...

Baily I think it was?
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SlideValve · Posted: Fri Nov 06, 2009 11:39 pm Post subject:

Sandman · Posted: Fri Nov 06, 2009 11:49 pm Post subject:

I'm looking forward to seeing this one run.
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scorpion2nz · Posted: Sat Nov 07, 2009 2:57 am Post subject:

it always a relief to see one you have made run .It makes all the frustration worthwhile

mogogear · Posted: Sat Nov 07, 2009 4:59 am Post subject:

Nice work SLV!
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Les · Posted: Sat Nov 07, 2009 7:44 am Post subject:

The improvements look good, when's the video coming out??

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SlideValve · Posted: Sat Nov 07, 2009 7:52 am Post subject:

Tomorrow

, I'll get some 1/8 in tubing so i can run it on live steam, The thing runs like the clappers, and is easily reaching speeds my Jensen 5 was. The thing is pretty gutless, but at 25-30 psi, I'm confident it could run a small generator, at a 1 to 1 pulley ratio.

Burnmafingers · Posted: Sat Nov 07, 2009 10:58 am Post subject:

Nice creation, looking foward to the video!

SlideValve · Posted: Sat Nov 07, 2009 11:26 pm Post subject:

Video is done, it will take about an 1 hour and 1/2 to load though, and it's on live steam