| Author |
Message |
    
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 3311
Registered: 11-2001
| | Posted on Sunday, May 11, 2014 - 01:18 pm: | 
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The Ramsey Motor 1907
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johnoxley
Senior Member
Username: johnoxley
Post Number: 117
Registered: 04-2010
| | Posted on Sunday, May 11, 2014 - 05:10 pm: |
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Related see articles on Desaxe principle. I thought this was unusual and once saw a Puch 250 cc motorcycle engine with 2 parallel cylinders/pistons on one crankpin.
Search finds many surprising surprising current examples. http://en.wikipedia.org/wiki/Desaxe but can't find a mention of when Desaxe first appeared. |
solarrog
Senior Member
Username: solarrog
Post Number: 576
Registered: 03-2002
| | Posted on Sunday, May 11, 2014 - 06:01 pm: |
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I have a Puch 250 twingle here in my shop, Kind of like riding a tractor cycle. Good torque not much top end performance they have a common combustion chamber also |
bruce
Senior Member
Username: bruce
Post Number: 437
Registered: 07-2002
| | Posted on Sunday, May 11, 2014 - 07:55 pm: |
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I think the Yankee twin/Ossa had the same arrangement??? |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 920
Registered: 07-2002
| | Posted on Sunday, May 11, 2014 - 08:35 pm: |
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Ferro used the same thing, not as exaggerated, this is why they didn't recommend reversing the engine. Modern auto engines use an offset wrist pin to accomplish the same thing. Drag racers found out that by reversing the pistons you could gain horsepower. |
rbprice
Senior Member
Username: rbprice
Post Number: 460
Registered: 11-2001
| | Posted on Sunday, May 25, 2014 - 05:34 pm: |
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If memory serves, the Ferro offset was 5/8 in. |
