LMS 6399 Fury

LMS 6399 Fury

Infobox Locomotive
name = LMS 6399 "Fury"
powertype = steam


caption = 6399 "Fury" in an official photograph in photographic grey livery.
builder = North British Locomotive Co.
serialnumber = 23890
builddate = 1929
whytetype = 4-6-0
uicclass=2'Ch
gauge = RailGauge|ussg
leadingsize = 3 ft 3½ in
driversize = 6 ft 9in
length = 64 ft 2¾ in
weight = 87 tons 2 cwt
fueltype=Coal
fuelc
convert|5.5|LT|t|1
waterc
convert|3500|impgal|l|abbr=on|lk=on
firearea = 28 ft²
tubearea = 1,335 ft²
fireboxarea = 218 ft²
superheaterarea = 274 ft² (high pressure)
355 ft² (low pressure)
cylindercount = 3 (1 hp, 2 lp)
hpcylindersize = 11½ × 26 in (292×660 mm)
lpcylindersize = 18 × 26 in (452×660 mm)
boilerpressure=1,400–1,800 psi (9.65–12.4 MPa) (hp boiler), convert|900|psi|MPa|2|abbr=on (hp drum), convert|250|psi|MPa|2|abbr=on (lp boiler)The London Midland and Scottish Railway (LMS) 6399 "Fury" was an unsuccessful experimental express passenger locomotive. The intention was to save fuel by using high pressure steam, which is thermodynamically more efficient.

Overview

Built in 1929 by the North British Locomotive Company in Glasgow, it was based on the frames and a modified boiler from the LMS Royal Scot Class. A 3-cylindered compound locomotive, it had one small high-pressure cylinder between the frames and two larger low-pressure outside cylinders, and a Schmidt high pressure water-tube boiler system. This raised high pressure steam at 900 psi (6.2 MPa) and low pressure steam at 250 psi (1.7 MPa). There was a sealed ultra-high pressure circuit working between 1400 and 1800 psi (9.7 to 12.4 MPa), filled with distilled water, that transferred heat from the firebox to the high pressure boiler.

Although given the number 6399, it was never taken into stock.

During a trial on the 10 February 1930, one of the ultra-high pressure tubes burst, killing Mr Schofield of the Superheater Company. The accident was thoroughly investigated and trials continued until 1933. Fury was then laid up until 1935 when it was rebuilt by William Stanier with a 2A boiler becoming 6170 "Royal British Legion", the first of the Rebuilt Royal Scots.

Despite the accident, Fury was an economic rather than a technological failure. As many other experimental locomotives showed, the theoretical benefits of high steam pressure were hard to realise in practice. Fuel is only one part of the operating costs of a steam locomotive — maintenance is very significant, and introducing extra complications always increased this disproportionally.

External links

* http://www.dself.dsl.pipex.com/MUSEUM/LOCOLOCO/fury/fury.htm More details and pictures
* http://britishrailways.tripod.com/exfury.html
* [http://www.dself.dsl.pipex.com/MUSEUM/LOCOLOCO/locoloco.htm Loco Locomotives] A large amount of information on high pressure steam locomotives, as well as many other rail oddities.


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