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Who can tell me what the valves or vents on the bottom of the cylinder's are for? Generally these are not found on model locos, unless added or the loco is done in brass. Some of my video tapes show these valves venting steam, and this appears especially at low speeds. I have both Westcott's Steam Locomotive Cyclopedia and Kalmbach's Guide to North American Steam Locomotives. Niether of these books descibe these valves. Also, what is a good book describing the actual operation of a steam loco, from either the Engineer and/or Fireman's point of view? <br /> <br />DeSchane
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