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Old 09-05-2018, 06:34 AM   #1
Chops
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Default Electrifying Moments

https://youtu.be/fm-oHCuqhDE
Some fantasy video of electric traction at the
El Paso Model Train Club of various units of
mine. The DRGW Krauss-Mauffei is a model
of a German design that used a hydraulic
transmission, and was not successful.
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Old 09-05-2018, 02:13 PM   #2
Mountain Goat
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Is weird mixing electric with hydraulic transmission. Hydraulic transmission was pioneered by the Germans after WW2, as an answer to the difficulties posed when trying to couple a diesel engine to a railway locomotive. While a mechanical gearbox can be used for lightweight railcars, or if low speeds are required, to use in a shunting engine to shift lengths of wagons, but to couple a diesel engine through a mechanical means to move a high speed express just didnt work. Many different attempts were tried and many gears were smashed in the process.
The transmission needed a form of "Give" designed into it. This came in either hydraulic or electric form.
Hydraulic was the more efficient use of power so hydraulic transmissioned locomotives could out perform the equivalent diesel electric, but it was found that diesel hydraulics needed higher revving engines and diesel electrics (Diesel engine driving a generator to power electric motors to drive the wheels) could be powered by low revving engines and therefore require less overall maintenance, so electric transmission was adopted and hydraulic locomotives were scrapped, some having very short lifespans and hardly been used (Britain had previously over ordered new locomotives to replace steam and then cut many lines the new locomotives were designed to be used on, so had an excess of locomotive power, so many locomotives were scrapped after hardly having much use. Some were sold abroad where possible. (Many class 08's were sold to places like Libeya)).
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Old 12-05-2018, 01:00 AM   #3
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A most interesting education. I never had a clue why builders would fool around
with a hydraulic transmission.
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