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London Underground Battery Locomotive
About this creation
This is my battery locomotive. It is the first of my LU creations but the last one to be functionally complete.

London Underground's service stock fleet includes 35 battery locomotives of which 29 are all built to the same basic design. This design dates back to 1938. My Loco is one of these. The locos are designed to the tube loading gauge (to fit in LU's 12ft diameter tunnels) In Lego that gauge equates to eight bricks in height (including track). These locos are ordinarily used to haul engineer's trains.

The interior of the locomotive is dominated by its batteries. These enable it to run on the tracks when the 630v DC power is switched off for maintenance work. It can also run on live power and ordinarily uses the live current to charge the batteries.

The locos have different couplings. One couples full size gauge trains and the other couples tube trains (which have much lower couplings). All have been refitted with buckeye and some have Ward couplers fitted. The locos are familiarly known as 'Rats'.



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   The following three pictures I found on the internet and are among the few that provided first inspiration for my model.



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   Due to the relative lack of info either on the internet or in literature I made a visit to London Transport's Museum Depot where there is one of the 1938 originals preserved. The following seven pictures are among those taken by me for details of the locos.



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   The cab.



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   The cab interior.



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   Full size gauge coupling.



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   Tube Loading gauge coupling.



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   Undercarriage detail.



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   Motor.



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   Rat Mk1. This is the only remaining screenshot of my first design. Some details are not completed.



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   Rat Mk2. The second design.



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   Rat Mk3. This was the first one to be built. It is in an all red livery due to a lack of yellow 1x2x2 plane windows. This is a relevant though not correct livery for an LU loco.



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   Rat Mk3. With moc wagons.



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   Rat Mk3. In the flesh.



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   Rat Mk3. End on.



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   Rat Mk3. The problem with this design was that the motors could not traverse at all and it was rather long.



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   Rat Mk3. Overhead view.



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   Rat Mk3. Comparison shot with 4565 alternative design loco.



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   Rat Mk4. The traversing problem sorted out and length reduced. Hauling a D stock train.



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   Rat Mk4. The traversing problem is sorted by cutting into the loco body.



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   Rat Mk4. However due to the length the coupling ends lean out to far on curves and either break the couplings or derail.



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   Rat Mk4. Showing full traverse of the motors.



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   Rat MkX. The final design. Yellow 1x2x2 plane windows have become available.



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   Rat MkX. Tube loading gauge coupling end.



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   Rat MkX. Full size gauge coupling end.



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   Rat MkX. The couplings problem is sorted by cutting the coupling ends and chassis ends off the loco body and attaching them to the motor units.



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   Rat MkX. Hauling a 95 Tube stock train



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   Rat MkX. Hauling a D Subsurface stock train



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   Rat MkX. With driver, for a size comparison.




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By David Tabner
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Added November 6, 2005
 


LEGO models my own creation MOCpages toys shop London Underground Battery LocomotiveEngines


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