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Thread: More O.T. - Opposition even - Cummins-Acates Engine Development.

  1. #1
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    Default More O.T. - Opposition even - Cummins-Acates Engine Development.

    Hi, Folks.
    Turn back now if reading about Cummins offends you.

    Cummins is apparently working on a 'new' engine design with Acates Power:

    https://www.youtube.com/watch?v=4PCtOXjqOyE

    http://www.foxnews.com/auto/2017/10/...-u-s-army.html

    BUTTT, is it a 'new' concept - or simply a revamped one?

    http://www.farmonline.com.au/story/3...ngine-is-back/

    https://www.youtube.com/watch?v=pGaISFg_ZIw

    From what I can gather, the 'new' engine has 2 crankshafts connected by a gear train while the Commer 'Knocker' pistons were connected by a system of rockers and links to a common crankshaft under the cylinders.

    Just my 0.02.
    You have a wonderful day. Best wishes.

    Deas Plant.

  2. #2
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    Default

    Same as antique 1930s Fairbank Morse OP engine. 2 cycle how will they make a 2 cycle run clean enough?
    Cat 12 grader, 8T running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 28,

  3. #3
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    Default N.m.p.

    Hi, Oldbeek.
    N.M.P. Not My Problem. There are supposedly better minds than mine being paid more than I ever was - probably a LOTTTT more - to figure that one out. Without a cylinder head to keep 'cool', they may be able to run at higher temperatures which would help to burn off some of the problem. Also, modern common rail fuel systems inject the fuel at higher pressures than earlier systems and can also split the injection into smaller 'bursts' to help spread the burn over the entire firing stroke.

    Also, from the 'blurb' I would guess that they are figuring on a fair bit less fuel per injection per piston.since it is all going into the one cylinder but servicing both pistons in that cylinder. Just guessing.

    Just my 0.02.
    You have a wonderful day. Best wishes.

    Deas Plant.

  4. #4
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    Default

    With all theses fires burning, making smoke, because the environuts dont want nothing touched, why the hell do we need cleaner burning engines?????????????????????????

  5. #5
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    Default Oh NO!!

    It sounds like a ....DETROIT!!!!.. maybe it won't smoke.. but I bet it leaks!!

  6. #6
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    Default

    It might do all they say. My question for the consumer market is will it be quiet enough with that long gear train between the cranks.
    Last edited by STEPHEN; 10-18-2017 at 07:08 PM.
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  7. #7
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    Default

    That's like the D11T, they went to a C-32 V-12 instead of the former and reliable 3508 V-8 with the same HP. Allot more moving parts in the V-12, four more cylinders and MORE expensive to rebuild, whats the point??????

  8. #8
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    Default Wikipedia page.

    Hi, Folks.
    Here is a link to the Wikipedia page on Aacates power.

    https://en.wikipedia.org/wiki/Achates_Power

    Apparently, testing began in 2005. NINE years later, in 2014 they had passed 5,000 hours of testing - - - out of a possible 78,600-odd hours available in that time. Why so few hours of testing? Breakdowns? Necessary modifications? What?

    And in 13 years, they still haven't released production models??????????

    Here is a link to 2 photos of a cutaway model of the Junkers Jumo 205 vertically opposed diesel aircraft engine from about 1934 and from which the Acates design apparently derives some of its design characteristics.

    https://en.wikipedia.org/wiki/Junker...05_cutview.JPG - click the arrow for the second photo.

    'N' if you want to get really complicated, here is the Wikipedia page for the Napier Deltic triple crankshaft, 18 cylinder engine.

    https://en.wikipedia.org/wiki/Napier_Deltic

    I personally don't like the idea of the gear train sending the output from one crankshaft to the other crankshaft. I think it would be a better bet to have both crankshafts geared to a separate out put shaft.

    Just my 0.02.
    You have a wonderful day. Best wishes.

    Deas Plant.

  9. #9
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    Gowanda NY
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    Default

    Quote Originally Posted by Deas Plant. View Post
    Hi, Folks.
    Here is a link to the Wikipedia page on Aacates power.

    https://en.wikipedia.org/wiki/Achates_Power

    Apparently, testing began in 2005. NINE years later, in 2014 they had passed 5,000 hours of testing - - - out of a possible 78,600-odd hours available in that time. Why so few hours of testing? Breakdowns? Necessary modifications? What?

    And in 13 years, they still haven't released production models??????????

    Here is a link to 2 photos of a cutaway model of the Junkers Jumo 205 vertically opposed diesel aircraft engine from about 1934 and from which the Acates design apparently derives some of its design characteristics.

    https://en.wikipedia.org/wiki/Junker...05_cutview.JPG - click the arrow for the second photo.

    'N' if you want to get really complicated, here is the Wikipedia page for the Napier Deltic triple crankshaft, 18 cylinder engine.

    https://en.wikipedia.org/wiki/Napier_Deltic

    I personally don't like the idea of the gear train sending the output from one crankshaft to the other crankshaft. I think it would be a better bet to have both crankshafts geared to a separate out put shaft.

    Just my 0.02.
    The two cycle Napier Deltic diesels made a lot of power in a small package.. Kind of the first of the lightweight high power in heavy applications... They used them in Patrol Boats "Nasty boats" and some locomotives in England had them.. along with the famous 2,700 hp "Super Pumper" System built in 1965 for the FDNY.I have heard they were very maintenance intensive and expensive to operate.. but nothing else could make the power in that size package.They also sounded like an overgrown 16V-149!!

  10. #10
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    Default Submarine engines in WW2

    I first read about dual crank shaft opposed piston engines, in the 70's when I was interested in Submarine operations during the 2nd world war. I had to look up the design because it wasn't clear to me how the worked, and was curious. I coped this from wikipedia.

    Historically, the opposed-piston engine was used in U.S. diesel-electric submarines of World War II and the 1950s.[5] Surviving diesel-electric submarines with these engines include USS Pampanito, USS Blueback, and USS Ling. This engine was also used in surface ships, notably in the diesel-electric Wind-class icebreakers and in the geared Edsall-class destroyer escorts.[6][7][8][9][10] When the innovative but faulty "pancake" engines of the 1950s Tang class proved unworkable, they were replaced with World War II-style Fairbanks-Morse engines, and these remained standard on US diesel-powered submarines through the early 1960s. Variants of the 38 8-1/8 and other Fairbanks-Morse engines provided (and continue to provide) backup power on US nuclear submarines commissioned through the 1990s.[11]

    I looked up Fairbanks Morse and I believe they still manufacture this style of engine for fix placement applications.
    Here is a link
    http://www.fairbanksmorse.com/engine...ston-model-38/

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