Subject:
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Re: Stupid question about steam engines
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 5 Apr 2000 03:20:15 GMT
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In lugnet.trains, James J. Trobaugh writes:
> Ok don't laugh me out of the group, but I have a very basic question
> about old steam engines. I don't understand the numbers for the wheel
> layouts. I thought I did, but after reading a book on train history this
> evening I'm even more confused than before. What do the series of three
> number mean when referencing the drive wheel layout of steam engines
> (i.e. 0-4-0,4-4-0,2-6-0,4-6-2 etc.)?
The first number is the number of wheels in the lead truck (ahead of the large
wheels driven by the rods), divide by two for the number of wheels on one
side. The 2nd number is the number of driven wheels, and the 3rd number is the
number of wheels in the trailing truck. When you see a 4 number sequence (like
4-6-6-4), the engine has two sets of driven wheels (and there are a small
number of engines with three sets of driven wheels).
Frank
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Message is in Reply To:
 | | Stupid question about steam engines
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| Ok don't laugh me out of the group, but I have a very basic question about old steam engines. I don't understand the numbers for the wheel layouts. I thought I did, but after reading a book on train history this evening I'm even more confused than (...) (24 years ago, 5-Apr-00, to lugnet.trains)
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