DMUs using hydro-dynamic brake

[Philip]

Following on from the EMU dynamic braking thread, which diesel units use hydro-dynamic braking nowadays?

I know the 175s used to have it working and it was quite noticeable depending on which part of the train/carriage you were sat in, but I haven't heard it used on these for a good few years. Is it operational on any of the 175s now?

Do any of the Turbostars use it?

 

[Strathclyder]

Do any of the Turbostars use it?

The 170s use disc brakes, while the 171s use air brakes. I'm not sure about the 168s and the 172s, though.

 

[MCR247]

Are you sure 170s and 171s use different brakes?

 

[Strathclyder]

Are you sure 170s and 171s use different brakes?

I did take it from Wikipedia, so there's a high chance it could be wrong.

E: All of the Turbostars use air brakes, according to my copy of Traction Recognition 2nd Edition by Colin J. Marsden. Sorry for any confusion caused.

 

[driver9000]

The 170s use disc brakes, while the 171s use air brakes.

What? They both use air operated disc brakes. Well, they're EP brakes.


Class 185 DMUs use Hydro-dynamic braking down to around 25mph when the EP disc brake takes over.

Class 180s have Hydro-dynamic brakes fitted but these have been isolated for years and I'm not sure if they've been reinstated since they returned to FGW.

 

[MCR247]

AFAIK they gave up on the dynamic brakes on 180s

 

[Philip]

Thanks. Why did they isolate the dynamic brake on the 175s a few years ago? Also when they used it on 175s it wasn't working on all the units and often you'd hear it under one carriage but not the other.