1. Stourbridge Lion

    Stourbridge Lion TrainBoard Supporter

    16,684
    103
    183
    Chicken cross the road question? {Why?} [​IMG] [​IMG] [​IMG] [​IMG] [​IMG]
    [​IMG]

    [​IMG]
     
  2. BoxcabE50

    BoxcabE50 HOn30 & N Scales Staff Member TrainBoard Supporter

    65,614
    16,435
    653
    [​IMG] Why what?

    If asking why UP built the engine, it was during a period of leadership when they believed in high horsepower. And did a bunch of experimenting. Eventually, it led to the famous DDA40X.

    Oh- The chicken crossed the road, to make people ask questions why. [​IMG]

    :D

    Boxcab E50
     
  3. Alan

    Alan Staff Member TrainBoard Supporter

    10,795
    442
    127
    They had the big boy and wanted diesel monsters also ;)
     
  4. NSCALEMIKE

    NSCALEMIKE TrainBoard Member

    849
    1
    23
    I believe the first diesel is a DD35 and the second a Gas Turbine right?
     
  5. HemiAdda2d

    HemiAdda2d Staff Member TrainBoard Supporter

    20,900
    20,302
    253
    I think so.
    Uncle Pete was all about the highest horsepower engines I could get, to cope with steep grades and big trains.
    I have a 1970's Trains mag, that features Cajon Pass, with MU'd double diesels. What a sight that must have been!
    The turbine was also an experiemtn of that same sort. The turbines were fuel inefficient at other than full throttle, they needed to run at notch 8 anytime they were running. The fuel expended at idle was nearly that of notch 8!
     
  6. Stourbridge Lion

    Stourbridge Lion TrainBoard Supporter

    16,684
    103
    183
  7. Alan

    Alan Staff Member TrainBoard Supporter

    10,795
    442
    127
    I would love to have seen (and heard!) a gas-turbine storming Cajon Pass!!
     
  8. HemiAdda2d

    HemiAdda2d Staff Member TrainBoard Supporter

    20,900
    20,302
    253
  9. Alan

    Alan Staff Member TrainBoard Supporter

    10,795
    442
    127
    Mmmmm, tempting. But not quite the same as standing trackside and feeling them roar past :D
     
  10. Hytec

    Hytec TrainBoard Member

    13,622
    5,507
    183
    I may be wrong, but I seem to remember that one of the reasons the UP dropped the Big Blows, aside from their lousy fuel economy at low speeds, was their tremendous trackside noise. I believe most of their assignments were on extremely desolate divisions like deserts, mountains, and other places where there were no towns and very few people.
     
  11. BoxcabE50

    BoxcabE50 HOn30 & N Scales Staff Member TrainBoard Supporter

    65,614
    16,435
    653
    They could really do the required job. But were indeed noisy. And had high maintenance costs.

    [​IMG]

    Boxcab E50
     
  12. chessie

    chessie TrainBoard Supporter

    6,183
    4
    79
    Neat pictures. [​IMG]

    Harold
     
  13. Hytec

    Hytec TrainBoard Member

    13,622
    5,507
    183
    There was one other negative about the UP Big Blows. GE had used their 1950's design of jet engine as the basis for these locomotives. These engines required JP-4 as their fuel, but UP had assumed that they would use the Bunker-C that the steamers and early diesel-electrics were using. Unfortunately, Bunker-C is a dirty mix of sulpher, carbon particles, and grit which really ate up the power turbine blades on the jet engines. In fact UP (and GE) had to change out turbine wheels about every three months of operation. Consequently, UP, having to choose between the high cost of JP-4 or the high cost of replacement turbine wheels, decided to drop the whole experiment after only a few years.

    I'm convinced that, if UP had allowed (and shared funding with) GE to continue turbine-electric development and refinement, the RR industry would have ended up with powerful and efficient locomotives....Oh Well.
     

Share This Page