drifting in mid gear

[Ben ClarkeParticipant @benclarke31388]

oiling cylinders

[Ben ClarkeParticipant @benclarke31388]

With a mechanical lubricator how does one maintain an oil supply to the cylinders when drifting in mid gear.

[Diane CarneyModerator @dianecarney30678]

 

Just a thought….

[JDEngParticipant @jdeng]

A mechanical lubricator should always be driven from a part of the motion which has a constant movement such as one of the main (as opposed to valve) crossheads or a part of the valve gear which does not alter its stroke length when the loco is notched up. Such a part is often one of the eccentric straps on a Stephenson fitted engine or one end of the expansion link or a return crank on a Walschaerts fitted loco.

 

If the lubricator is driven from any part of the valve gear which alters its stroke length as the loco is notched up then the amount of oil will reduce as the loco gets faster – a state of affairs which is not desirable!

 

If your engine’s lubricator is driven from a component with a constant length of stroke then it doesn’t matter whether you drift in mid or full gear, the oil delivery will remain unchanged.

 

John.

[Author]

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