Motoring Discussion > What's that engine? Miscellaneous
Thread Author: bathtub tom Replies: 6
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New Thu 16 May 13 14:24 
 What's that engine? - bathtub tom
Ignoring the source and the vehicle, what's that engine?

i.dailymail.co.uk/i/pix/2013/05/16/article-2325379-19CEC5EA000005DC-384_964x735.jpg

It appears to have two cylinders, a spark plug in the left and a de-compressor in the right. Single exhaust to the RH cylinder.

Trojans had a twin cylinder, 2-stroke engine with a single combustion chamber, but they were configured one in front of the other, not a parallel twin.
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New Thu 16 May 13 15:38 
 What's that engine? - Slidingpillar
No idea as to engine, but the picture and a brief description are at the bottom of this page:
www.aqpl43.dsl.pipex.com/MUSEUM/TRANSPORT/motorwhl/motorwhl2.htm

Could easily be an Italian engine as the monowheel may not be of Mr Gerdes making at all, but a Motoruota.

PS Don't explore the site unless you have some spare time - it's fascinating...
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New Thu 16 May 13 15:38 
 What's that engine? - TeeCee
blog.hemmings.com/index.php/2010/11/22/m-goventosas-one-wheel-to-obscurity/

It would seem that everyone's stumped....

Edit: Some speculation about the engine there though, thought to be a single.
Last edited by: TeeCee on Thu 16 May 13 at 15:39
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New Thu 16 May 13 15:45 
 What's that engine? - Slidingpillar
See the page it refers to though, another picture is of a quite different engine.
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New Thu 16 May 13 15:51 
 What's that engine? - TeeCee
Still trying to work out what having two cylinders with only one plug and exhaust between them would be supposed to achieve.

Any ideas?

Never mind, it's a "split single" (thank you Wikipedia) and from its provenance there, I have to suspect a Garelli. Off to look for Garelli pics to confirm.
Last edited by: TeeCee on Thu 16 May 13 at 15:54
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New Thu 16 May 13 16:05 
 What's that engine? - TeeCee
I'm convinced it's a Garelli 350 split single.

Can't find exactly the right one, but this is awfully close:
motorivista.com/garelli-racing-motorcycle/

Look at the design of the crankcase etc. Identical. Detail differences in the head area (including what looks like the world's most oversized ally gasket???).
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New Thu 16 May 13 15:48 
 What's that engine? - TeeCee
Also, just to prove that you can come up with a daft idea and then make it even dafter, see about halfway down here: chillopedia.com/military/six-failed-weird-fighting-inventions/

Now the article depicted starts: "In England, an Italian inventor has just demonstrated...". I wonder if that was the work of the same M. Goventosa? I find it difficult to believe that there were two Italians attempting to flog monowheels to the unwary at that time.
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