Turbojet train

They streamlined a Budd Rail Diesel Car, added two General Electric J47-19 jet engines, and nicknamed it the M-497 Black Beetle.

Testing was performed on a 25 mi (40 km) length of the normal NYCR system – a virtually arrow-straight layout of regular existing track between Butler, Indiana, and Stryker, Ohio.

On 14 August 1974, using the jet engines, the LIMRV achieved a world record speed of 255.7 mph (411.5 km/h) for vehicles on conventional rail.

[3][4][5] In 1970, researchers in the USSR developed the High-speed Laboratory Railcar [ru] (SVL) turbojet train.

If the research had been successful, there was a plan to use the turbojet powered vehicle to pull a "Russian troika" express service.

SVL turbojet railcar
LIMRV before J52 jet engines were added
Monument at the rail-car factory in Tver depicting a Turbojet train