Model Engine Maker
Engines => Your Own Design => Topic started by: Zephyrin on September 15, 2018, 10:47:47 PM
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This is a very basic steam plan I did a few years back.
This engine is pretty small, a single cylinder, 8mm bore and 11 mm stroke, i.e. 0.55 cm3, with a conventional piston valve...
The boiler is a plain tube, heated by an alcohol lamp with 3 wicks and the boiler pressure is about 1-2 bar usually.
some pictures on the build here : https://goo.gl/photos/hwc94ZgS8SigHKMfA
After some changes in the engine, I took a video of the steaming tests
this engine can run at a tremendous speed, and reaches 6000rpm off load, the boiler pressure up to 1.5-2 bar.
The noise is really high, surprising for such a little steam engine. Too much pressure in the cylinder as the exhaust open maybe, the valve could be modified to shorten steam admission and give a longer detent.
https://www.youtube.com/watch?v=OVJcXgxBGPE
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Wow, that thing really flies!! Sure does run well though and nice to see it doing some work too. Nicely done.
Bill
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Good grief! I would've been so scared that something would fly off. What an engine!
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That little baby really winds up and still able to run very slow.
Have a great day,
Thomas
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Hi Zephryn, a great little engine. Shows what can be achieved with meths and a beautifully made engine. And such a tiny piston valve too.
Can we have some photos to admire beside the video please?
MJM460
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Sounds like an angry bee running a big chain saw! Hmmm... May be a new horror movie idea there...
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wow thats amazing ...i might get a tacho ..how high can they read too.. Mach 1, 2, 3 ??
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thanks for these comments...
I do have lot of fun with this engine.
I changed the piston (cast iron) for a lighter one, in stainless steel, to reduce vibrations, which are now at a much lower level and avoid the disintegration...
but the engine is still not fully balanced, and I have little room on the crankshaft to increase the counterweight, not that easy.
MJM : I gave the link for the pictures...
If I found a proper hull, certainly that driving a propeller in water would keep it at a more reasonable pace.
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Hi Zephryn , sorry, I missed the link, yes, it is there.
Does it need a special app or something to open, I seem to only get to a title page.
Perhaps I will just watch the video again.
MJM460
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Hello again Zephyrin,
Your photo file is very interesting, thanks for sharing.
Have a great day,
Thomas
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Wow!
What a humdinger!
Nice one...
:) :ThumbsUp:
gary