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Wanted to send this to MR, but they advise that they can not read all emails. While reading The above mag, I ran across a "Trade Topics" item concerning a Winton Fluid Drive, and an ad for a similar drive by "Tomhar". This looks like a flywheel. It is shown installed in a Varney F3. It is filled with oil; different oils can be used to change viscosity , thereby changing the rate of inertia. The advantages are a coasting/momentum effect, and automatic speed adjustment when double-heading engines. Sounds very interesting and a relatively simple , mechanical device. Don't know how long these were marketed. They might still be with us, if manufacturers had offered them installed. Cost may have been a factor. The developement of solid flywheels, and then DCC, (and axial(?) gearing)would have surpassed them, but some flywheels do not really provide any coasting effect. Anyone have further experience/comments?
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