murphys motors

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murphys motors

Postby lrlandreth » Wed Jun 24, 2009 4:50 pm

I recently inherited an murphys motors engine,I wonder if anyone has
heard of this engine? I also wonder about lubricating the moving parts
some places have holes to put oil in but the piston has no place to
oil I put some in the cylinder is this ok? I don't want to damage by
oiling or not oiling
Thanks for any responses
Lenard Landreth
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murphys motors engine

Postby stan.hornbaker » Wed Jun 24, 2009 6:47 pm

Is this an externally heated Stirling or Hot Air engine of some kind?

Or is it an internal combustion engine? Googling for "Murphy Motors" seems to be concerned with such types!

Can you furnish us with a more detailed description?
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Response to murphys motors

Postby lrlandreth » Thu Jun 25, 2009 1:05 pm

I got word yesterday that some documentation had been found and is being forewarded to me perhaps it will answer some of my questions
thanks for your responses Lenard p.s. itis an externaly heated egine I have used food warming fuel
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Response to murphys motors

Postby stan.hornbaker » Thu Jun 25, 2009 1:49 pm

My guess based on the above information that it is similar to the Stirling1 shown on the following webpage.

http://www.bullnet.co.uk/shops/test/stirling_engines.htm

The original Stirling1 was made and sold from Phoenix AZ.
Your engine is most likely a valuable antique. Enjoy!
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Response to murphys motors

Postby marzsit1964 » Thu Jan 21, 2010 7:23 am

i'm guessing this is a small motor with a 4" flywheel, maybe a bit smaller... any decent grade of oil applied to the piston and rod bearings should be more than enough, and maybe too much for engines on disply that tend to collect dust.......
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Response to murphys motors

Postby stan.hornbaker » Thu Jan 21, 2010 12:32 pm

Do NOT under any circumstances apply any oil to any part of a Model Stirling engine. It will create more friction and drag than the engine can over come. A model Stirling engine must be absolutely air tight except for a 'tiny' bit of leakage at the packing gland.

With the inside vented to atmosphere the engine should freely spin by hand. The piston should free fall through the cylinder when vented and when the bottom of the cylinder is closed the piston should fall slowly (several seconds) to the bottom. If you feel that lubrication is needed use only a little micro-fine graphite or molybdenum disulphide powder to all bearing/rubbing surfaces.


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