For the diesel fans

Discussion in 'Australian Motorcycles' started by John Littler, Jul 5, 2005.

  1. John Littler

    John Littler Guest

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  2. John Littler

    Theo Bekkers Guest

    Theo Bekkers, Jul 5, 2005
    #2
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  3. John Littler

    John Littler Guest

    The picture on the freeserve page looks good, the pics in the slideshow
    of the chopper with the dual forks looks horrid.

    JL
    IMNSHO
     
    John Littler, Jul 5, 2005
    #3
  4. Iain Chalmers, Jul 5, 2005
    #4
  5. John Littler

    Theo Bekkers Guest

    I resisted downloading the Flash page and , now that I have, I'm in
    agreement with you. I do like the concept of a motorcycle that will cruise
    at low revs and lots of torque.

    Theo
     
    Theo Bekkers, Jul 5, 2005
    #5
  6. You need a Guzzi you do!

    big (Oh, hang on...)
     
    Iain Chalmers, Jul 5, 2005
    #6
  7. John Littler

    John Littler Guest

    <applause>

    JL
     
    John Littler, Jul 5, 2005
    #7
  8. John Littler

    Robert Milan Guest

    There is an article in latest Two Wheels on a diesel motorbike also.

    Uses a three cylinder VW motor quite extensively modified.

    Looks exciting!

    robert
     
    Robert Milan, Jul 5, 2005
    #8
  9. John Littler

    sharkey Guest

    Strange design. I wonder if it reduces piston rock, too.
    Interesting that the upstroke and downstroke are asymmetrical
    .... if you look at the animation, the upstroke has the 'legs
    together' and the downstroke the 'legs apart'.

    I wonder if it's meant to be a 2-stroke or a 4-stroke diesel.
    I'm guessing 4 because the animation [*] has two pistons rising
    together, and it looks like maybe a cam sprocket on the front
    crank. I suppose the flywheels are weighted to eliminate
    the vibration.

    They gloss over the fact that large numbers of cylinders don't
    just provide better balance, they also provide a smoother
    power delivery and more room for valves. I wonder how it
    would compare to a square four?

    -----sharks

    [*] flashy website but crappy to navigate: try
    Company > English > Motor Concept > Characteristics.
     
    sharkey, Jul 5, 2005
    #9
  10. John Littler

    Theo Bekkers Guest

    Oooeerr! Didn't know it was a porn site.
    I gave up on the animation, 128K link.
    How do more, presumably smaller, cylinders provide more room for valves?
    There is a argument that says diesels get more efficient if the cylinders
    displace more than one litre each.

    Square four? That was, in it's Ariel form, an engineering disaster. Note how
    many manufacturers are using that configuration now. (Two-smoke fours that
    really want side of the crank-case induction don't count).

    Theo
     
    Theo Bekkers, Jul 5, 2005
    #10
  11. John Littler

    Gary Woodman Guest

    Gary Woodman, Jul 5, 2005
    #11
  12. John Littler

    Robert Milan Guest

    The one in Two Wheels (June I think - with MT 01 on cover) is closer to 200
    kgs and a sports bike - looks encouraging.
     
    Robert Milan, Jul 5, 2005
    #12
  13. John Littler

    sharkey Guest

    No-one seems to be able to produce heads with more than 5 valves.
    Well, except for that 8-valve oblong bore Honda. And there's a limit
    to how big the valves can get before they limit your redline.
    How many are using double cranks now!

    The point is: taking the doubled crank as read, because it's used by
    this design, if you attached the conrods to two separate pistons
    above the two flywheels instead of one piston between them, wouldn't
    you have the same nice balance but with twice as much displacement?

    Of course cooling is likely to be tricky ...

    -----sharks
     
    sharkey, Jul 5, 2005
    #13
  14. John Littler

    Knobdoodle Guest

    Yep; someone here said it was a turbo but I read the article and it seems
    to be naturally aspirated and making very good (theoretical) horsepower!
    The proof is in the riding though and the reporter wasn't given one.
    Clem
     
    Knobdoodle, Jul 5, 2005
    #14
  15. John Littler

    Bill_h Guest

    Turbo'd

    ENGINE liquid cooled, three cylinder,
    turbocharged and intercooled diesel
    BORE X STROKE 76.3 x 87mm(1200cc)
    COMPRESSION RATIO 16.0:1
    FUELSYSTEM direct unit injection
    RAKE/TRAIL 231/NA
    WHEELBASE 1533mm
    CLAIMED WET WEIGHT 205kg
    FUEL CAPACITY 18L
    AVERAGE FUEL CONSUMPTION 2.5L/100 km


    "Isn't she beautiful?", Van der Starre asks proudly as 1 gaze at the
    pulsating diesel engine in sheer disbelief.
    programming of the fuel injection we changed everything. The engine
    now produces an estimated 74.5kW at 400Orpm and more than 200Nm of
    torque between 2500rpm and 5000rpm. It does 100 km/h in first gear,"
    Kees explains.

    Cheers, Bill

    Bill_h

    (remove the nospam bit for email)
     
    Bill_h, Jul 5, 2005
    #15
  16. John Littler

    Knobdoodle Guest

    ~
    Yeah but apart from that!

    Umm.... LOOK OVER THERE! [sound of running feet]
    Clem
     
    Knobdoodle, Jul 5, 2005
    #16
  17. John Littler

    G-S Guest

    Not at the moment no... but the best 2 stroke road bike of all time the
    RG500 did use it. That wasn't killed by the engine configuration... it
    simply faded away because people didn't buy large 2 stroke road bikes. [1]

    G-S

    [1] No correspondence will be entered into from Yamaha 500 fans... they
    were less powerful and handled worse due to a dud front end.
     
    G-S, Jul 5, 2005
    #17
  18. John Littler

    Knobdoodle Guest

    X-No-archive: yes
    The bit I snipped out said "excluding twin-crank two-smokes"!

    I re-read Theo's post sober (a rare experience) and now I understand that he
    was saying
    "it was a disaster so no manufacturers are using that design now"
    rather than the
    "it was a disaster then but plenty of manufactures are using it successfully
    now.." that I read it as.

    Sobriety eh?... Who'd've thought!
     
    Knobdoodle, Jul 6, 2005
    #18
  19. John Littler

    G-S Guest

    Yeah... bugger eh...

    I don't remember reading Theo's post (I must have missed it... or I was
    pissed when I read it :)


    G-S
     
    G-S, Jul 6, 2005
    #19
  20. John Littler

    Theo Bekkers Guest

    Beer mate?

    Theo
     
    Theo Bekkers, Jul 8, 2005
    #20
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