Subject:
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Re: Toy Story Train comments?
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 3 Jun 2010 07:12:30 GMT
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Viewed:
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23078 times
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In lugnet.trains, John Neal wrote:
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That’s good to know. I haven’t gotten one yet, and would like to run it as
unaltered as possible.
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I built a coal car over a 9v motor, and tried it out on a circle of track. It
had serious problems running while pushing the engine in front of the motor. I
tried adding some straights in to make an oval so it’d have a couple stretches
without curves to maybe build up a bit of speed, and it didn’t improve things
very much. Eventually I figured out that what was happening was that the motor
wheels were slipping, so I popped open the coal car and stuck a weight brick in
the hollow cavity. Works fine now.
I should point out that I made a few tweaks to the design. Instead of using
non-friction axle-pins to hold the main driver wheels on, I’ve replaced them
with red 6-long axles. Then I put some stud-pins in the drive wheels and used
them to attach some 1x8 tiles. I don’t know the standard practice for how they
pair those up, but I figured they wouldn’t both be at the same point in their
rotation, so I’ve got them 90 degrees out of phase with each other for now. 180
degrees seems like it would be more likely (one piston extending while the other
one retracts, so you’d just have to switch the flow of steam from one to the
other).
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Message has 2 Replies:
 | | Re: Toy Story Train comments?
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| (...) Most folk call this a "tender", since it carries water as well (and often, fuel oil rather than coal if the engine is an oil burner) (...) If weight helps you may have some binding in the driver mechanism somewhere. (...) Steam engines are (...) (14 years ago, 3-Jun-10, to lugnet.trains, FTX) !
| | | Re: Toy Story Train comments?
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| (...) No, 90 degrees is the norm for 2 cylinder locos, as Larry says it's called "quartering" (because they are a quarter of a circle apart). It ensures that there is always at least one piston not at the end of it's stroke. ROSCO (14 years ago, 4-Jun-10, to lugnet.trains, FTX)
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Message is in Reply To:
| | Re: Toy Story Train comments?
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| (...) That's good to know. I haven't gotten one yet, and would like to run it as unaltered as possible. (...) It's called a "tender." (URL) I believe that this is what I will end up doing when I get mine. (...) Given the news of a new PF train motor (...) (15 years ago, 19-May-10, to lugnet.trains, FTX)
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