British Rail 10800

Infobox Locomotive
name = British Railways 10800
powertype = Diesel-electric


caption =
builder = North British Locomotive Company
builddate = 1950
serialnumber = 26413
gauge=RailGauge|ussg|lk=on
primemover = Paxman 16RPHXL Series 2
cylindersize = convert|7|x|7.25|in|mm|0|abbr=on
transmission = DC generator
DC traction motors
tractionmotors = BTH 159, four (4) off
uicclass = Bo'Bo'
wheeldiameter = convert|3|ft|6|in|m|3|abbr=on
minimumcurve = convert|3.75|chain|m|lk=in
trainbrakes = Vacuum
locobrakes = Brakeforce: convert|45|LTf|kN|abbr=on|lk=in
wheelbase = convert|31|ft|0|in|m|2|abbr=on
length = convert|41|ft|10+1/2|in|m|2|abbr=on
width = convert|9|ft|2|in|m|2|abbr=on
height = convert|12|ft|9+1/2|in|m|2|abbr=on
weight = convert|69.80|LT|t
topspeed = convert|70|mph|abbr=on|lk=on
poweroutput = convert|827|hp|abbr=on|lk=on
tractiveeffort = convert|34500|lbf|kN|1|abbr=on|lk=on
fuelc
convert|300|impgal|abbr=on|lk=on
waterc
convert|90|impgal|abbr=on
coolantc
convert|85|impgal|abbr=on
multipleworking = Not fitted
trainheating = Clarkson steam generator
axleloadclass = Route availability: 4
railroad = British Railways
powerclass = 3MT; "later:" Type 1
roadnumber = 10800
retiredate = August 1959
disposition = Sold Brush Traction, rebuilt into research locomotive "Hawk", retired 1968, cannibalised 1972–1976, scrapped 1976.

British Railways 10800 was a diesel locomotive built by the North British Locomotive Company for British Railways in 1950. It had been ordered by the London, Midland and Scottish Railway in 1946 but did not appear until after the 1948 nationalisation of the railways.

Design was by George Ivatt and the locomotive was intended as a possible replacement for steam locomotives on secondary and branch lines. The single-cab layout (long bonnet forward) gave the driver a poor view of the road ahead but it was no worse than in a steam locomotive so it would have been considered acceptable at the time.

pecification

*Bogie wheelbase: 8 ft 6 in
*Bogie pivot centres: 22 ft 6 in
*Sanding equipment: Pneumatic
*Heating type: Steam- Clarkson
*Multiple coupling restriction: Not fitted
*Engine Type: Paxman 16RPHXL Mk2
**Cylinder bore: 7 in
**Piston stroke: 7¼ in
**Engine horsepower: 827 hp
*Main generator type: BTH
*Aux generator type: BTH
*Number of traction motors: 4
*Traction motor type: BTH 159
*Gear ratio: 66:15
*Cooling water capacity: 85 gal
*Boiler water capacity: 300 gal
*Boiler fuel capacity:* 90 gal

Rebuilding

In 1961 or 1962 (sources differ) No. 10800 was bought by Brush Traction and rebuilt for experiments in a.c. power transmission. Brush named the locomotive "Hawk". Specifications that changed after rebuilding were:
*Sanding equipment: Not known
*Heating type: Not fitted
*Engine Type: Maybach MD655
**Cylinder bore: 7¼ in
**Piston stroke: 8¾ in
**Engine horsepower: 1,400 hp
*Main alternator type: Brush
*Aux alternator type: Brush
*Traction motor type: Modified rewound BTH 159
*Gear ratio: Not known
*Cooling water capacity: Not known
*Boiler water capacity: Not applicable
*Boiler fuel capacity: Not applicable

It was used until 1968, and slowly stripped for pars from April 1972, until it was finally scrapped at Brush Traction, Loughborough in 1976.

imilar locomotives

The later British Rail Class 15 and British Rail Class 16 were built to a similar design.

External links

* [http://www.therailwaycentre.com/Pages%20Loco/D%20loco%20page%20list.html The Railway Centre]
* [http://glostransporthistory.visit-gloucestershire.co.uk/railwayraptors.htm The Railway Raptors]