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worlds smallest v12

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  #1  
Old 8th December 2011, 15:16
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worlds smallest v12

Watch this video its brill, worlds smallest v12

http://wimp.com/tiniestengine/


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  #2  
Old 8th December 2011, 15:27
chadburn chadburn is offline  
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Remarkable, now, about the model Spitfire!!
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  #3  
Old 8th December 2011, 16:34
Graham Wallace Graham Wallace is offline  
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Absolutely fascinating.

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  #4  
Old 8th December 2011, 16:45
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Excellent .
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  #5  
Old 8th December 2011, 19:29
gordy gordy is offline  
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Very enjoyable.
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  #6  
Old 8th December 2011, 20:04
donandgina donandgina is offline  
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Just shows, that there are some craftsmen still around. Wonder how many hours, days, weeks, months, years that it took to make.
Don
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  #7  
Old 8th December 2011, 20:17
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1,200 hours according to this

Work of art aint it.
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  #8  
Old 8th December 2011, 20:23
donandgina donandgina is offline  
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Absolutely amazing, last time I saw something similar was a small working steam engine when I was a kid, a couple of years ago.
Don
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  #9  
Old 8th December 2011, 22:14
george jackson george jackson is offline  
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Stunning! You couldn't put a price on something like that.
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  #10  
Old 8th December 2011, 23:17
Malky Glaister Malky Glaister is offline  
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Beautiful

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  #11  
Old 9th December 2011, 00:24
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check this one out and see it running.

http://www.youtube.com/watch?v=QDZICiGmDxs
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  #12  
Old 9th December 2011, 01:02
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Fantastic ; Pity it was not a ship ( with hand made engines )
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  #13  
Old 9th December 2011, 01:08
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This was mentioned on this site a couple of years ago - worth a look - wonder if he ever got the ignition system sorted!!

http://www.craftsmanshipmuseum.com/Tomlinson.htm
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  #14  
Old 9th December 2011, 01:20
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Very nice George ; The original posting here however seems to have been all hand made , no reference to CNC .
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  #15  
Old 9th December 2011, 15:00
chadburn chadburn is offline  
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The only thing that suprised me was after all the careful lathe work on the crankshaft he took a grinder to it to shape the web's, I thought he would have milled them or even cut them with a hacksaw before finishing off.
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  #16  
Old 9th December 2011, 15:30
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In Brocklebanks on the Motor ships we carried 3 Chinese fitters most of whom were excellent machinists . In their spare time they would use the workshop for little projects . I remember watching one of them making a 3 throw crankshaft for a model steam engine and later making a small boiler with rivited seams ( all with stuff from the scrap box ) I never saw the finished product but the various components were excellent quality .

Last edited by Derek Roger; 9th December 2011 at 15:32..
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  #17  
Old 10th December 2011, 23:52
Joe Freeman Joe Freeman is offline  
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I have watched this video several times over the last week and I am amazed at the precision workmanship performed by this chap. However I to could not believe after all the fine tooling that he trimmed the webs of the crankshaft by hand on a grinder no less. I guess it just shows the craftsmanship of this chap.
There are other miniature engines shown on U-tube but probably not quite as small.
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  #18  
Old 11th December 2011, 10:35
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I showed the video to a former schoolfriend who took a mechanical engineering degree and then spent his working life as a pilot with BOAC/BA. Retired now, his only comment was to ask if it was normal in marine engineering for engines to run with the camshaft at the same speed as the crankshaft. (See 3 min 50 secs into video).

As a sparks who spent most of his time on steamships, I have no idea about marine engineering practice at all let alone as it applies to motor ships.

Any answers?
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Old 11th December 2011, 15:39
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Yes, if it's a 2 stroke engine - don't know which engine this miniature is based on (Detroit V12 maybe?)
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  #20  
Old 13th December 2011, 16:01
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Great job but it does run on compressed air...
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  #21  
Old 13th December 2011, 16:07
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Quote:
Originally Posted by Duncan112 View Post
Yes, if it's a 2 stroke engine -
Excuse my ignorance, the only 2-stroke engines that I am familiar with were fitted to motorcycles (BSA Bantam and Francis Barnett) had no valves at all.
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  #22  
Old 13th December 2011, 22:19
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2 stroke refers to the number of piston strokes required to complete one power cycle - one up and one down, in a 4 stroke engine two up strokes and two down strokes are required. Some 2 stroke engines have cylinder valves, others rely on cylinder ports. This site:

http://www.dieselduck.ca/machine/01%..._engine.01.htm

will explain all.

Similarly those used to small 2 strokes on motorcycles and garden machinery often express surprise when confronted with the forced lubrication system of a large 2 stroke engine - good wind up for the first tripper though - asking him to find the 2 stroke oil for the main engine.
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  #23  
Old 14th December 2011, 13:30
chadburn chadburn is offline  
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Quote:
Originally Posted by Ron Stringer View Post
Excuse my ignorance, the only 2-stroke engines that I am familiar with were fitted to motorcycles (BSA Bantam and Francis Barnett) had no valves at all.
Ron, the piston "double's" as the valve the setting up of the point's inside the flywheel was a pig of a job on the old two strokes. The most interesting two stroke petrol engine has to be the Bristol Hercules aircraft engine were the "Valve" is the bore liner and it has a twisting movement to shut off the Port's.
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Last edited by chadburn; 14th December 2011 at 14:00.. Reason: re write
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  #24  
Old 16th December 2011, 09:58
Peter Short Peter Short is offline  
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Quote:
Originally Posted by chadburn View Post
The most interesting two stroke petrol engine has to be the Bristol Hercules aircraft engine were the "Valve" is the bore liner and it has a twisting movement to shut off the Port's.
Chadburn,

I am pretty sure all the Bristol sleeve valve engines were four stroke, the only two stroke sleeve valve aero engine I can think of at present was the Rolls-Royce Crecy, experimental only.
-----------
Re. the V-12 video, it's a few weeks since I watched it so my memory is a bit hazy - it is not really an IC engine, it seems to be specially made for compressed air running. Kind of interesting, but not really a model of anything. Only two main bearings by the look of it.
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  #25  
Old 16th December 2011, 16:15
chadburn chadburn is offline  
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You are right Peter after giving it further thought.
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