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UP 4014

Discussion in 'International Heritage Railways/Tramways' started by athelney, Jul 23, 2013.

  1. Dunfanaghy Road

    Dunfanaghy Road New Member

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    Thanks Tom.
    Definitely collar work, then.
    Pat
     
  2. guycarr360

    guycarr360 Member

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    It should be pointed out that the run took place with Roller Bearing equipped Rolling stock, and one of the big hurdles to overcome in operation was treating the rolling stock with sufficient respect until everything truly warmed up.

    Another example is here as UP844 helps rescue a stalled freight.



    When asked about "how much", they could hang off the drawbar of 4014, Ed Dickens looked over at a freight yard in Sacremento, and said, all of that!!!
     
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  3. Enterprise

    Enterprise Well-Known Member

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    Altitude has very little effect on the power output of a steam locomotive except in poorly designed boilers the mass of air available for combustion could be reduced enough to limit steam production and superheat temperature.
     
  4. mdewell

    mdewell Member

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    But on the other hand, reduced atmospheric pressure will mean a lower boiling point for water (93 degrees at 6,000 feet). Whether that would completely counter balance the above point I have no idea but in theory it should help.
     
  5. Jamessquared

    Jamessquared Nat Pres stalwart

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    No it won’t, because the boiler pressure controls the temperature of the water in the boiler.

    Tom
     
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  6. mdewell

    mdewell Member

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    Doh! :Facepalm:
     
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  7. guycarr360

    guycarr360 Member

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    The best clip to date...
     
  8. The Saggin' Dragon

    The Saggin' Dragon Part of the furniture Staff Member Moderator

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    Only when its in a free volume, not when its contained ... like in a boiler.
     
  9. guycarr360

    guycarr360 Member

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    Some nice pieces on youtube have just appeared, as the recent 2 month tour came to completion.

    Now safely locked up for 2019, a year that saw the unthinkable happen, and a big boy steam again.

     
  10. 30854

    30854 Part of the furniture

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    Just like a closed lorry carrying live chickens weighs the same even if they're all having a flutter at the same time!

    I do recall some Andean railways needing to upgrade from their first diesels, which were pretty much HP for HP equivalents of the steam locos the were intended to replace. The thin atmosphere at high altitudes has a marked negative effect on the power output of normally aspirated IC engines .... witness all piston engined aircraft have much lower 'ceilings' than jet planes (or rocket powered craft for, that matter).
     
  11. guycarr360

    guycarr360 Member

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    BTW mileage for its first year is calculated to be just short of 11,000, for her 2 circular trips.
     
  12. The Saggin' Dragon

    The Saggin' Dragon Part of the furniture Staff Member Moderator

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    True, but there are were very few normally aspirated IC engines designed to work at Altitiude; they were all supercharged or turbo-supercharged. The Spitfire PRXIX could evade the Messerschmitt Me262 jet at altitude by dint of its superior service ceiling (43500ft vs. 37500ft)
     
  13. guycarr360

    guycarr360 Member

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    And this has what to do with UP4014???
     
  14. marshall5

    marshall5 Well-Known Member

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    See posts 320 - 326.
     
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  15. osprey

    osprey Member

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    Both have wheels....
     
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  16. guycarr360

    guycarr360 Member

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    Back on track then...

     
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  17. guycarr360

    guycarr360 Member

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    Classic thread drift on NP....
     

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