Class 37 Throttle

Discussion in 'General Discussion' started by inversnecky, Jan 28, 2021.

  1. inversnecky

    inversnecky Well-Known Member

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    Hitherto I've just driven the AP Class 37, which has a throttle which more of less adds power from initial application, but I've been trying out the RETB scenario on the Scottish Western Lines using the supplied 37.

    In both the West Highland Line Extension and West Highland Line South, the throttle on the 37/0 and 37/4 acts differently from the AP 37:

    "The Regulator (throttle lever) only applies power when the lever is moved beyond 20%."

    37 throttle.png

    "Driving the Class 37/0 The locomotive as modelled has been carefully designed to be driven in the same way as the real thing.... The power handle on this locomotive operates in two stages. In the first part of its travel, the engine is held at idle speed and the torque imposed on it by the generator is controlled proportionately to the handle position. In the second part of its travel, the torque permitted is at the maximum value, and the rotation speed of the engine is controlled by handle position."

    Why is there such a variance with the way the AP throttle works? Is one more in tune with the real loco than the other, or was there indeed this sort of variance in subclasses of the real 37s?
     
  2. Pookeyhead

    Pookeyhead Well-Known Member

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    Both /4 and /0 versions of AP 37s work the same way, so it's not a variance between the sub classes. I've never driven a 37 (in real life), so I've no idea. I have to say though... I've not noticed this myself.. I'll have a play later. I never drive the Kuju 37... it's horrible.
     
  3. Clumsy Pacer

    Clumsy Pacer Well-Known Member

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    The OP means the 37/0 and 37/4 supplied with West Highland Line, and how they act differently to the AP 37.
     
  4. Pookeyhead

    Pookeyhead Well-Known Member

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    The west highland line one does indeed only seem to apply power after 20%, yes. The normal Kuju one behaves the same as the AP one. I've no idea which is true to life. I wonder if there's anyone in here who's ever actually driven a 37?
     
  5. inversnecky

    inversnecky Well-Known Member

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    I will find out!

    It just seems so different: the Highland ones basically do nothing unless the throttle is at 30% or above.
     
  6. ARuscoe

    ARuscoe Well-Known Member

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    There are loads of little quirks like this in different trains, some which don't apply brakes until you hit -30%, the 166 doesn't idle until you hit -30% (giving you less space for braking notches)
    I tend to view it as engine quirks so rather than seeing it as "a 37" so they should all work the same I try to work with the differences
    Of course you have to find them first
     
  7. ntypeman

    ntypeman Well-Known Member

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    I'm sure in real life every loco has its quirks... Where I work that's certainly the case with every bus... sure they may be the same type but every one is different in its own little way...

    Eric
     
  8. inversnecky

    inversnecky Well-Known Member

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    Someone kindly posted this on a railway forum about the 37:

    931BEAB6-0077-4B33-9C83-91D765A78BB3.png 848A06CF-7EE7-4F36-90C5-F89AD351FEBA.png
     
  9. 749006

    749006 Well-Known Member

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    Two different locos made by two different developers work differently
     
  10. Pookeyhead

    Pookeyhead Well-Known Member

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    Looks like the West Highland one is correct then.
     
  11. inversnecky

    inversnecky Well-Known Member

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    That’s
    That’s what I gleaned from it, but the person who produced this said it was the AP one....

    Confusing!
     

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