LNER Class A4 4468 Mallard is a 4-6-2 ("Pacific") steam locomotive built in 1938 for operation on the London and North Eastern Railway (LNER) at Doncaster Works to a design of Nigel Gresley.

The LNER Class A4 is a class of streamlined 4-6-2 steam locomotives designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognisable, and one of the class, 4468 Mallard, holds the record as the world's fastest steam locomotive.

LNER Class A4 4468 “Mallard” is recognized for its record setting run on 3 July 1938, when it reached 126 mph, a record for speed utilizing steam traction. The record was set on Stoke Bank near Grantham on the East Coast Main Line. In the 1930s, the Gresley A4 4-6-2 Pacific locomotives were the pinnacle of speed.

The A4 class was designed for sustained 100+ mph running and Mallard was one of a few of the class that were built with a double chimney and double Kylchap blastpipe, which made for improved draughting and better exhaust flow at speed.

The LNER Class A4 4468 Mallard is best known for its record-breaking speed run on July 3rd, 1938. The locomotive reached a top speed of 126 mph on the East Coast Main Line, near Grantham, Lincolnshire.

2020年9月20日 · On July 3rd, 1938, the 4468 Mallard, an A4-class steam locomotive, was performing an alleged brake test for its London and North Eastern Railway (LNER) owners. What better way to test a new...

在1938年7月3日的一次制动试验中，使用第一台装有Kylchap排气系统的LNER A4型机车（4468号，别号Mallard）牵引6辆客车及一辆动力试验车，期间达到了202.8km/h的世界速度纪录。

野鸭号编号4468，是 太平洋机车 A4系列的一台。 以他蓝色奇异的外表而著称。 野鸭号于1938年7月3日创造的蒸汽机车的最高速度——203千米每小时。 野鸭号是英国伦敦和东北部铁路公 …

London & North Eastern Railway No. 4468 Mallard, is a type of LNER Class A4 4-6-2 'Pacific' steam locomotive. The locomotive was built in the LNER Doncaster works on the 3rd of March 1938. Mallard is one of the well-known Class A4 Pacifics designed by Sir Nigel Gresley, and currently holds the record for the fastest steam locomotive in the world.

On the 3rd July 1938, the LNER 4-6-2 A4 Class No. 4468 Mallard, driven by Joe Duddington and fired by Tommy Bray, on a stretch of the East Coast Main Line between Peterborough and Grantham took the World speed record at a measured 126 mph (202 kph), Its record as the world's fastest steam locomotive has never been beaten.