Class 93 Tri-mode Loco

[ac6000cw]

Surely a dynamometer car would still require a steep bit of railway to record the results for it's performance up a hill? I would hazard a guess that modern telemetry can be fitted to the units without needing a dedicated vehicle that the fragmented railway doesn't really have a good place for.

Modern traction control systems can measure/log tractive effort, power, speed and probably pretty much anything else you might want to know about how a loco is performing. so I doubt you need anything else.

If you wanted a variable test load, hauling a loco or two with decent capacity dynamic/rheostatic braking that can be used independently (i.e. not linked with the train or loco friction brake systems) could provide it. I don't know if any UK locos can do that (class 70s maybe - anyone know?).

 

[47286Dan]

This mornings allocation.

93001 GROG WORKSP DY 260Q421F07 F CREWE SYD B
93007 GROG WORKSP DY 260Q421F07 F CREWE SYD B

Dan

 

[hwl]

Modern traction control systems can measure/log tractive effort, power, speed and probably pretty much anything else you might want to know about how a loco is performing. so I doubt you need anything else.

Agreed nothing else needed.

If you wanted a variable test load, hauling a loco or two with decent capacity dynamic/rheostatic braking that can be used independently (i.e. not linked with the train or loco friction brake systems) could provide it. I don't know if any UK locos can do that (class 70s maybe - anyone know?).

70, 88, 90 or 91 would be suitable. The resistors aren't that big (volume constrained) so you would need a few trailing locos to do this.

 

[AndrewE]

Agreed nothing else needed.

what about drawbar pull? all of the above are very fine, but take no account of adhesion! The whole point of a dynomometer is that it measures the pull, which is otherwise missed completely.