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Thread: Geared steam locomotive drive linkage - GIF

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    Supporting Member Altair's Avatar
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    Geared steam locomotive drive linkage - GIF

    Shay No. 11 geared steam locomotive crankshaft and bevel gear drive linkage.




    Previously:

    Geared steam locomotives - video and photo

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    Did all steam locomotoves operate in that manner, or just some of them?

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    Supporting Member Frank S's Avatar
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    Quote Originally Posted by tlnixon View Post
    Did all steam locomotoves operate in that manner, or just some of them?
    Very few actually
    most would look more like these
    Geared steam locomotive drive linkage - GIF-nmah_train1.jpg
    Geared steam locomotive drive linkage - GIF-steam-locomotive-south-australian-railways-no-t-253-glen-allison.jpg
    Geared steam locomotive drive linkage - GIF-r1.jpg
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    Supporting Member mklotz's Avatar
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    Quote Originally Posted by tlnixon View Post
    Did all steam locomotoves operate in that manner, or just some of them?
    The idea behind geared locomotives is to drive as many wheels as possible to improve the tractive effort. This makes them attractive for use in difficult terrain as in logging and mining.

    There are three classes of geared locos...

    SHAY

    Two or three cylinder vertical engine driving longitudinal side gear shaft. Boiler offset to side opposite engine.

    HEISLER

    Two cylinders in a V-configuration under centralized boiler. Engines drive a centrally mounted driveshaft that is geared to wheels.

    CLIMAX

    Similar to Heisler but engines point forward at an angle of 45 deg to vertical.



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