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PM Research #3 Power Plant

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Krypto:
Below is a picture and short video of my last project, a PM Research #3 Power Plant. 

http://www.youtube.com/watch?v=RDTyfrQfr6Y

It features a Jensen 2.5" electrically fired boiler providing steam for a PM Research #3 engine which turns a PM Research Dynamo powering a small incandescent light bulb.  I did all the machining for the engine, dynamo and pipework.  The boiler originally came from a Jensen 25 steam engine, but I have several of these and this particular one wasn't seeing much use.  It can be replaced to the donor engine at a later date if I wish.

Michael S.:
Hi,
I like the facility.
A good combination of engine, boiler and dynamo. And with a real lightbulb!

Michael

Krypto:
Yes, I like the look of real light bulbs and they put a nice load on the engine.

MJM460:
Hi Krypto,

Welcome to the forum.  Nice work on the engine.  Do you have any progress photos?   

Lovely to see a complete working power plant in action.

Have you made any attempt to measure the dynamo output voltage and current?  Along with the required boiler pressure?

MJM460

Krypto:
Do you have any progress photos?

Thank you!  I do have progress photos, but won't bother posting them here as I have yet to deduce how to post photos inline with text.   Also, with the high caliber of work posted daily on this site, I would imagine most viewers would be bored stiff viewing the construction of a simple model such as the PM #3.  However, if you look at the bottom of my posts, you can see a link to my blog which does have a few build articles on this power plant with photos to view if you wish.

Have you made any attempt to measure the dynamo output voltage and current?  Along with the required boiler pressure?

Generally I steam this model at around 20 psi.  In the video, you can read the gauge at the top of the boiler if you have a big enough screen.  The PM dynamo will produce much more energy than I'm showing here, but this little engine could never drive it.  I have a selection of E10 bulbs so with the proper belt ratio I can pick one that will produce a pleasing light and yet not overwhelm the engine with an unworkable load.  Without looking, the bulb is probably a #131 which when nicely lit is around 1.30V and .10A.

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