The highest recorded power output from an A4 was 2,450 drawbar horsepower when Mallard herself was hauling 11 coaches (390 tons tare, 415 tons gross) up Stoke Bank at a sustained 80 mph in 1963. O.S.
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On 30 November 1934 his Flying Scotsman, an A1 Pacific, was the first steam locomotive to officially exceed 100mph in passenger service, a speed exceeded by the A4 Mallard on 3 July 1938 at 126mph, a record that still stands.
On 3 July 1938, the A4 class locomotive Mallard raced down Stoke Bank at 126mph to set a new steam locomotive world speed record. That record still stands.
Fastest Train in the World – 357.2 MPHThe current world speed record for a commercial train on steel wheels is held by the French TGV at 574.8 km/h (357.2 mph), achieved on 3 April 2007 on the new LGV Est. The trainset, the track and the cantenary were modified to test new designs.
“There are only six of this type of train surviving in the world,” said George Muirhead, manager of Locomotion, the National Railway Museum at Shildon.
It was on 30 November 1934 that Flying Scotsman achieved the first properly authenticated 100mph for a steam engine. This was while she was running between Leeds and London.
Union Pacific reached out to EMD for more power, and the result was the behemoth EMD DDA40X. Often cited as both the largest and most powerful diesel-electric locomotive ever built, the 98-foot, 5-inch, 475,830-pound machine is staggering. The prime movers are a pair of EMD 16-645E3A diesels.
In addition, the tracks, signals, rail cars and software made in the U.S. are costlier than imports, largely because the government has not funded rail the way European and Asian countries have, experts say.
The locomotives weigh between 100 and 200 tons (91,000 and 181,000 kilograms) and are designed to tow passenger-train cars at speeds of up to 125 miles per hour (200 kph). Siemens' modern engines produce up to 4,200 horsepower, and the generator can turn this into almost 4,700 amps of electrical current.