| Author |
Message |
    
happymcc
Member
Username: happymcc
Post Number: 9
Registered: 12-2015
| | Posted on Monday, December 14, 2015 - 01:05 pm: | 
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I AM ON A QUEST TO FIND THE ENGINE IN A MICHIGAN FISH TUG I WAS ON AS A CHILD . BETWEEN ME AND MY UNCLE WE THOUGHT IT WAS A DIESEL ( OR OIL ) 2 STROKE OPEN CASE OR VISIBLE CRANKSHAFT ENGINE . MY UNCLE THINKS HE REMEMBERS A SMALL BLOWER AND AN AIR TANK . WERE THERE EVER A 2 STROKE OPEN CRANK ENGINE MADE. 2 STROKES ARE CHARGED FROM CRANK CASE PRESSURE I THOUGHT . ANY IDEAS ? |
ernie
Senior Member
Username: ernie
Post Number: 2192
Registered: 01-2002
| | Posted on Monday, December 14, 2015 - 02:02 pm: |
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Yes an open crank 2 stroke diesel is possible with a blower.
This being said I have not heard of one.
Now that being said something new, but actually old related to antique engine technology shows up almost every day so I am NOT saying there was no such thing.
If you think the 3 cylinder Campbell looks familiar Bill S may know the history on the one he has.
Those engines were built in Lake Wazata,MN.
In the list of fish tugs I saw at least one reference to a Campbell engine.
From my experience identifying old engines the profile/silhouette in ones mind is often right.
If that Campbell engine looks right to you I would lean in that direction.
It is human nature to remember visuals much better than verbal descriptions. |
happymcc
Member
Username: happymcc
Post Number: 10
Registered: 12-2015
| | Posted on Monday, December 14, 2015 - 02:27 pm: |
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BOTH MY SELF AND MY UNCLE REMEMBER IT BEING DIESEL . HE REMEMBERS A SMALL COMPRESSOR . I REMEMBER HOW SLOW IT FIRED EVEN UNDER WAY IT KCUGGED KCUGGED ALONG THE WAY . SO THAT COULD SAY IT WAS A HOT BULB ENGINE . TED SAYS HE REMEMBERS AN AIR TANK ALSO WHICH MAY HAVE BEEN TO START IT ? DONT KNOW . THE CAMPBELL LOOKS GREAT BUT IS A 4 STROKE GAS ENGINE . |
miro
Senior Member
Username: miro
Post Number: 835
Registered: 11-2001
| | Posted on Monday, December 21, 2015 - 08:04 am: |
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The GM / Detroit diesel n-71 series engines (2-71, 3-71 etc) are 2 cycle diesels.
Although they are not open crankcase engines, they use a Rootes type blower to put air into the cylinder. And they have intake and exhaust valves like a 4 cycle.
The slow speed that you recall would mean the blower would have been geared up to a high speed to get enough air pressure to scavenge the spent air / fuel from the cylinder.
I also recall visiting a large 2 cycle Fairbanks diesel in Vermont which had an open cranckcase. It reportedly shook the boat visibly when it was idling at the dock.
Miro |
gregoryan
Senior Member
Username: gregoryan
Post Number: 129
Registered: 09-2004
| | Posted on Monday, January 11, 2016 - 03:45 pm: |
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some old open crank 2 strokes had a double ended cylinder [ like a steam cylinder ; eg; with piston rod coming thru a gland] the gudgeon being outside on a guide, called a cross-head. This way the bottom end of the cylinder would aspirate the engine.  |
gregoryan
Senior Member
Username: gregoryan
Post Number: 130
Registered: 09-2004
| | Posted on Monday, January 11, 2016 - 03:54 pm: |
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here are a few more, incl 'the only 2 stroke gasoline engine with an open crank'!
I previously saved these images from another member's posts - i couldnt find their links.
 |
happymcc
Member
Username: happymcc
Post Number: 11
Registered: 12-2015
| | Posted on Monday, January 11, 2016 - 10:21 pm: |
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THANKS VERY MUCH GUYS BUT MY UNCLE AND MYSELF REMEMBER A 2 STROKE DIESEL AND IT HAD A SMALL BLOWER . FROM WHAT I HAVE READ SO FAR . THE BLOWER IS THE ONLY WAY A 2 STROKE COULD WORK WITH AN OPEN CRANKSHAFT . STILL LOOKING |
