The M-497 nicknamed Black Beetle by the press was an experimental jet-powered locomotive test bed of the New York Central Railroad (NYC) corporation, developed and tested in 1966 in the United States of America.
Two second-hand General Electric J47-19 jet engines designed as boosters for the Convair B-36 Peacemaker intercontinental bomber.
Were mounted atop an existing Budd Rail Diesel Car an RDC-3, part coach, part baggage and mail configuration body which had received a streamlined front cowling.
The construct was then successfully sent on test runs over the existing tracks between Butler, Indiana, and Stryker, Ohio.
The line was chosen for its arrow-straight layout and good condition, but otherwise unmodified track. On July 23, 1966, the car reached a speed of 183.68 mph an American rail speed record that still stands today.