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Thread: OT: Train porn

  1. #21
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    Quote Originally Posted by uncle pete
    That link the OP listed is about the most complicated electrical,hydraulic, mechanical piece of equipment I've ever seen.

    Pete
    Yeah, but Rube Goldberg would have loved it! : :

  2. #22
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    Yes, extreme temperature swings are involved. It gets cold in Minnesota as well as hot and that makes a difference. Same as here where the maximum temperature range is about 150 degrees Fahrenheit.

    Have a look here for many examples of sun kinks, some very extreme.

    Sun Kinks
    Free software for calculating bolt circles and similar: Origin now settable to bottom left! All values positive. Click Here

  3. #23
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    Quote Originally Posted by Evan
    Yes, extreme temperature swings are involved. It gets cold in Minnesota as well as hot and that makes a difference. Same as here where the maximum temperature range is about 150 degrees Fahrenheit.
    OMG! Is that 'air' temp?!

  4. #24
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    Chris,
    Yes it is, Not super comman, But I've seen - 50f quite often, + 100F Really isn't all that uncomman in Evans and my area. Coldest I've experienced? - 54c in Cochrane Ontario. And of course the fuel jelled in the reffers fuel tank for the load I was hauling. It's a refreshing? experience to work outside trying to get a motor started at those temps. Oh yeah, Just to make it perfect, A 30 mph breeze on top of that.

    Pete

  5. #25
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    Right...no 'Big Boys' currently running. The club in Albuqurque NM is restoring one.
    One of the guys in the Model Engineering Society of Oklahoma is making a model, about 20 feet long. Casting all the parts and then machining them. Super effort.
    John Burchett
    in Byng OK

  6. #26
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    Quote Originally Posted by uncle pete
    Chris,
    Yes it is, Not super comman, But I've seen - 50f quite often, + 100F Really isn't all that uncomman in Evans and my area. Coldest I've experienced? - 54c in Cochrane Ontario. And of course the fuel jelled in the reffers fuel tank for the load I was hauling. It's a refreshing? experience to work outside trying to get a motor started at those temps. Oh yeah, Just to make it perfect, A 30 mph breeze on top of that.

    Pete
    Well, rugged country requires rugged men. Thank you both for fitting the profile.
    As for this wuss... When the remnants of this tropical depression blows outa here, I'm going free diving for Sea Urchins to make turned Christmas ornaments. If I see any hot looking machines on the beach I promise to post some pix.

  7. #27
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    I'm no railroad expert, but without expansion joints of some kind , kinks would have to form. Concrete roads and steel bridges have allowances for thermal expansion , but apparently steel rails do not ?

  8. #28
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    Quote Originally Posted by Bill736
    I'm no railroad expert, but without expansion joints of some kind , kinks would have to form. Concrete roads and steel bridges have allowances for thermal expansion , but apparently steel rails do not ?
    Yes they do,

    Pictures & description http://en.wikipedia.org/wiki/Track_(rail_transport)
    John

    I used to be indecisive. Now I'm not so sure , but I'm not a complete idiot - some bits are still missing

  9. #29
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    Quote Originally Posted by jugs
    Yes they do,

    Pictures & description http://en.wikipedia.org/wiki/Track_(rail_transport)
    you need to put the bracket on the end of url

    my firefox is playing ..cant seem to copy and paste properly .

    all the best.markj

  10. #30
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    Quote Originally Posted by Chris S.
    OMG! Is that 'air' temp?!

    I believe Evan is talking about air temp --- but you actually bring up a very good point - "rail temp" is even more extreme - maybe closer to 200 - 225 degree's


    Trains are very efficient and the entire concept of a steel wheel on a steel rail is one of the main reasons - BUT - they could be much more efficient due to the losses in the rail flex to the ties and the ground - most trains flex the rails an incredible amount - sometimes 1 to 2 inches, this happens at every wheel cluster - next time a train goes by take a look at the relationship between the rail and the ground - (not right at a reinforced road crossing) it will most likely amaze you...
    It takes massive amounts of energies to flex every square inch of rail hundreds of times back and forth over and over again - so much so that it heats the rails up just in one passing.

    great concepts need good follow through and the average train on rails linked to wood ties falls way short of what it could be - It "was" a great idea for it's time but it's way outdated now - unless your talking the super trains that use entirely different "track".

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