Elvas Tower: Some possible issues with electric traction - Elvas Tower

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Some possible issues with electric traction

#1 User is offline   darwins 

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Posted 14 May 2019 - 09:46 AM

I have been trying to write an OR file for an old, third rail electric train, fitted with vacuum brakes.

Two issues encountered:


(1) OR by default seems to assume that any electric traction starts with "pantograph lowered"

This is regardless of setting PantographToggle1 ( 0 1 0 ) or PantographToggle1 ( 0 1 1 )

This is something of an irritation for third rail traction - as so long as it is on an electrified section the shoe would normally be in contact with the rail.

There seems to be an issue of OR having some controls by default - bell, lamps, wipers, pantograph - even if these are not present in the eng file (because they were not found on the prototype!)



(2) This is an observation, though I don't know if it is needed by any prototype. Maybe by some modern South African emu:

For an air braked train:

DoesBrakeCutPower( 1 )
BrakeCutsPowerAtBrakeCylinderPressure( 15 )

works fine.

For a vacuum braked train:

DoesBrakeCutPower( 1 )
BrakeCutsPowerAtBrakeCylinderPressure( 15inHg )

Results in the train has no power even when the brake pipe is fully charged to 21inHg.

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