Subject:
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Re: New MOC: Prototype Class 14 Diesel Loco with BBB Wheels
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 27 Mar 2005 21:40:55 GMT
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Viewed:
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1550 times
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In lugnet.trains, Mark Bellis wrote:
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Here’s a new train MOC, a prototype Class 14 diesel loco.
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Very nice!
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It uses BBB wheels and is articulated to get round the curves.
It uses 2 technic gearmotors for power, so it has an electric feed from an
adjacent vehicle with a train motor (not yet constructed).
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From my experience, the hardest part of doing that is matching the speed of the
supply car. I actually ended up putting a rubber band drive in my loco to allow
some slip, and gearing so it was faster than the train motor. The technic motors
seem to run a lot slower with the train motor in parallel, I guess they’re less
efficient. I was thinking about removing the train motor altogether and just
using it for power pickup, but never got around to it.
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Pictures of the real loco can be seen here:
http://www.preserved-diesels.co.uk/engines/14/index.htm
I used cams for the counterweights on the jackshaft (the shaft from the
engine that moves the rods to drive the wheels). There are two ‘bogies’ -
one with four wheels and the other with two wheels and the jackshaft.
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Is the jackshaft geared to the wheels, or just relies on the rods to turn it?
ROSCO
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Message has 1 Reply:
 | | Re: New MOC: Prototype Class 14 Diesel Loco with BBB Wheels
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| (...) I found that at low power levels of RCX drive, a technic motor in parallel actually caused the train motor to speed up - the technic motor must provide some filtering of the PWM. I already have other engines using gearmotors, so I used similar (...) (19 years ago, 28-Mar-05, to lugnet.trains, FTX)
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