BXProject

[Father Ted]

Yes, a big FO Auto box.

[smiffy]

I like the choo-choo-puff in venetian red and yellow. What a handsome beast.

Umm, it's much darker than that, it's more like Delage Red, the same colour as my CX turbo.

[smiffy]

Yes it is rather smart. I don't know much about tractive power that's not steam.

How do the drybollocks work then? some sort of g/box??

Not entirely sure exactly how the drive is achieved, as you would need to get the motive power to each axle, on each bogey.
This is easily done on a diesel electric, you just put a traction motor on how ever many axles you want to drive, and just route cables from the MASSIVE alternator accordingly.

I've never looked at the drive arrangement on a Hydraulic....

[Way2go]

The mechanical transmissions used for railroad propulsion are generally more complex and much more robust than road versions. There is usually a fluid coupling interposed between the engine and gearbox, and the gearbox is often of the epicyclic (planetary) type to permit shifting while under load. Various systems have been devised to minimise the break in transmission during gear changing, e.g. the S.S.S. (synchro-self-shifting) gearbox used by Hudswell Clarke.

Diesel-mechanical propulsion is limited by the difficulty of building a reasonably sized transmission capable of coping with the power and torque required to move a heavy train. A number of attempts to use Diesel-mechanical propulsion in high power applications have been made (e.g. the 1,500 kW (2000 horsepower) British Rail 10100 locomotive), although none have proved successful in the end.

Also see:

http://www.greatwestern.org.uk/index-dh.htm

[Philhod]

Ah! Voith Hydraulic Transmission. Google here I come.

[docchevron132]

Voith = utter shite. That is all.

[smiffy]

Voith = utter shite. That is all.

Agreed!