APT APU engine

[102 fan]

Hi

What make of engine was the APU in the APT P?

Thanks

 

[starrymarkb]

Do you mean APT-E? The P was all electric

 

[102 fan]

Didn't the P train have a small diesel generator?

 

[sprinterguy]

Didn't the P train have a small diesel generator?

I've never heard of it having such a feature, although that doesn't necessarily mean that it didn't.

The gas turbine engine in the APT-E was a British Leyland product, and the APT-E was fitted with an auxillary diesel generator to power the trains' electrical systems as the original turbine and alternator arrangement provided for this purpose could be better used providing additional traction power.

http://www.apt-e.org/early/early.htm

Each powercar of the E train was to contain 4 turbines and 4 alternator sets for motive power and one other turbine and alternator known as the (APU, Auxiliary Power Unit) to produce power for the electrical system on the train. After power output testing it was found that the 4 turbines could not sustain the required level of power output so the APU turbine and alternator were re-positioned with the rest of the motive power units and a diesel generator was fitted in the APU bay at the rear of each powercar. Leyland also up-rated the gas turbines to 350 bhp, thus giving the train 5 motive power units and 1 APU at each end. Each turbine was accompanied by a control unit fitted inside TC2.

 

[rail-britain]

Didn't the P train have a small diesel generator?

As above, the APT-E had a APU, making it more like a dual engined diesel-electric loco
The APT-P was more like a traditional electric loco (compare the bogies on the power car to those on the Class 91 loco)

 

[Sun Chariot]

102 fan is in fact correct.

Behind the driving cab, in each DTS, was a diesel generator to be used as an auxiliary power supply for air-conditioning and catering, as and when power could not be drawn from the OHLE. Although intended to cover 'drags' rather than power-car failure, I've not found any evidence suggesting how often the generators were actually used.

Back to the OP, I've not found any information on who supplied the generators but, given the political situation in 1978-9 (when the APT was built), I'd wager they were supplied by British Leyland.

 

[rail-britain]

I'd wager they were supplied by British Leyland.

The APU on the APT-E was supplied by British Leyland, originally a sixth turbine, however due to the power being turned off during testing it was soon realised a separate power supply would also be required
It is shown as a Leyland 350 unit
Strangely the diagrams for the APT-P don't show the manufacturer or part name, but only its purpose

 

[102 fan]

Thanks folks. Being a stationary engine restorer, I was hoping it would be a Lister