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  1. #11
    DarkSider#1617 Steve 0080's Avatar
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    Larrry, you are in rare form tonight !!!
    " Truth is often deemed rude, blunt and to the point which is why so few make their friend " Freddy Hayler ..352-267-1553 Sanford, FLA Gutterman6000@Gmail.com

  2. #12
    Senior Member bobbyf6b's Avatar
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    Sounds far fetched to me. If you imagine a boxer punching his gloves together then the pistons would face each other and share a combustion chamber. I call BS on the boxer moniker.



    I'm being facetious.

  3. #13
    Moderator BIGLRY's Avatar
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    Quote Originally Posted by bobbyf6b View Post
    Sounds far fetched to me. If you imagine a boxer punching his gloves together then the pistons would face each other and share a combustion chamber. I call BS on the boxer moniker.



    I'm being facetious.
    and that my friend is called a "split-single" or "Twingle" engine it is a variant on the two-stroke engine with two cylinders sharing a single combustion chamber.
    The following post is from https://en.wikipedia.org/wiki/Split-single


    "Valvless engine of 1919, showing the operating cycle

    The rationale of the split-single two-stroke is that, compared to a standard two-stroke single, it can give better exhaust scavenging while minimizing the loss of unburnt fresh fuel/air charge through the exhaust port. As a consequence, a split-single engine can deliver better economy, and may run better at small throttle openings.

    A disadvantage of the split-single is that, for only a marginal improvement over a standard two-stroke single, the "Twingle" has a heavier and costlier engine. Since a manufacturer could produce a standard twin-cylinder two-stroke at an equivalent cost to a Twingle, it was perhaps inevitable that the latter should become extinct.

    There have been "single" (i.e. twin-bore) and "twin" (i.e. four-bore) models. Unusually for a motorcycle engine, some Twingles have the carburetor mounted on the front of the engine, beneath the exhaust.
    The first split-single engine was patented in 1912 by Italian engineer Adalberto Garelli. His company, Garelli Motorcycles, produced a 346 cc version for use in motorcycles for road use and for racing. Production continued until 1926, by which time Garelli was increasingly concentrating on the military market. Garelli motorcycles remained in business until the late 1990s, but they did not further develop or produce these engines.

    Trojan (invented 1913)The Trojan two-stroke, as used from 1913 in the Trojan car in the UK. The "fore-and-aft" layout of the cylinders means that the V-shaped connecting rod has to flex slightly with each revolution. Unlike the German/Austrian motorcycle engines, this engine was water-cooled.

    Puch 1923-1970 Sears marketed considerable numbers of the Puch SGS split-single fitted with both these innovations as the "Allstate 250" or "Twingle" in the US
    (I had one, it was an oil burning, sparkplug fouling SOB).

    DKW 1931-1939, In 1931 split-single engines produced by Ing Zoller were used in motorcycle racing and helped DKW dominate smaller motorcycle racing classes between the wars.

    Duray Indiananpolis 500 In 1932 the Mallory Special car driven at Indianapolis by Duray used a Duray 16-cylinder two-stroke using a split-single configuration

    Monaco-Trossi 1935 the Monaco-Trossi Formula One car was built with a 16-cylinder radial engine using a split-single configuration

    TWN 1946-1957 German TWN motorcycle company (originally part of Triumph Motorcycles in the UK) experimented with split-singles in 1939 and started producing two models when production resumed in 1946.
    https://en.wikipedia.org/wiki/Split-single

    Post WWII arrangement, carburetor to the front under the exhaust (neither visible). Transfer port visible at back. One connecting rod 'piggy-backed' on another.

    The guy who invented the first wheel was an idiot -
    the guy who invented the second one... he was the genius!


    http://theringfinders.com/blog/Larry.Royal/

  4. #14
    shooter
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    Quote Originally Posted by bobbyf6b View Post
    Sounds far fetched to me. If you imagine a boxer punching his gloves together then the pistons would face each other and share a combustion chamber. I call BS on the boxer moniker.



    I'm being facetious.
    Bobby how do you know Larry isn't shinin you on again? I wouldn't trust him if I was you.

  5. #15
    Moderator BIGLRY's Avatar
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    Quote Originally Posted by shooter View Post
    Bobby how do you know Larry isn't shinin you on again? I wouldn't trust him if I was you.

    The guy who invented the first wheel was an idiot -
    the guy who invented the second one... he was the genius!


    http://theringfinders.com/blog/Larry.Royal/

  6. #16
    Senior Member Old Ryder's Avatar
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    Anybody ever build a bike with a "Wankle" engine? I have always thought the compact design and smooth power would be right at home on a bike.
    "Life is hard. Harder when you are stupid"-- John Wayne[SIGPIC][/SIGPIC]

  7. #17
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    Quote Originally Posted by Old Ryder View Post
    Anybody ever build a bike with a "Wankle" engine? I have always thought the compact design and smooth power would be right at home on a bike.
    YES- Theres one at my local HonYamKawa dealer. I THINK it's either a suzuki or Kawa...cant remember and it's about 30 years old.

  8. #18
    Moderator BIGLRY's Avatar
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    Quote Originally Posted by Old Ryder View Post
    Anybody ever build a bike with a "Wankle" engine? I have always thought the compact design and smooth power would be right at home on a bike.
    Suzuki RE5 is a motorcycle with a Wankel rotary engine that was manufactured by Suzuki from 1974 to 1976.
    https://en.wikipedia.org/wiki/Suzuki_RE5


    The guy who invented the first wheel was an idiot -
    the guy who invented the second one... he was the genius!


    http://theringfinders.com/blog/Larry.Royal/

  9. #19
    Senior Member hiflyer's Avatar
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    Quote Originally Posted by BIGLRY View Post
    [SIZE=3][I]Suzuki RE5 is a motorcycle with a Wankel rotary engine that was manufactured by Suzuki from 1974 to 1976.
    I remember that bike like it was yesterday. Unfortunately I can't remember where I put my keys today.

  10. #20
    Moderator BIGLRY's Avatar
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    Quote Originally Posted by hiflyer View Post
    I remember that bike like it was yesterday. Unfortunately I can't remember where I put my keys today.
    and one reason why I went keyless on my VTX1800 in 2008.
    http://www.californiavtxriders.com/p...p?f=26&t=34961

    The guy who invented the first wheel was an idiot -
    the guy who invented the second one... he was the genius!


    http://theringfinders.com/blog/Larry.Royal/

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