The EMD DH1 was an experimental

diesel-hydraulic A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels ...

switcher locomotive A switcher locomotive (American English), shunter locomotive (British English), or shifter locomotive (Pennsylvania Railroad terminology) is a locomotive used for maneuvering railway vehicles over short distances. Switchers do not usually move ...

built by

General Motors Electro-Motive Division Progress Rail Locomotives, doing business as Electro-Motive Diesel (EMD), is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. The company is owned by Caterpillar through its su ...

in May 1951. It was powered by a pair of small diesel engines suspended under the frame, driving through a pair of

Allison Allison may refer to: People * Allison (given name) * Allison (surname) (includes a list of people with this name) * Eugene Allison Smith (1922-1980), American politician and farmer Companies * Allison Engine Company, American aircraft engine ...

torque converter A torque converter is a type of fluid coupling that transfers rotating power from a prime mover, like an internal combustion engine, to a rotating driven load. In a vehicle with an automatic transmission, the torque converter connects the power ...

transmissions to the inside wheels on each

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

. These inside wheels were substantially smaller than the outside wheels on each truck. One example exists in Clinton, Michigan as of 2020. Over 60 examples of a three axle DHI and its derivatives were built by

Clyde Engineering Clyde Engineering was an Australian manufacturer of locomotives, rolling stock, and other industrial products. It was founded in September 1898 by a syndicate of Sydney businessmen buying the Granville factory of timber merchants Huds ...

in Australia and used on private railways, in particular in the sugar industry in

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , establishe ...

. The Clyde Engineering model was the DHI-71 and the two DHI-110s on Lakewood Firewood Company. These DHI models were built between 6/54 and 6/71.

References

* *https://archive.today/20130222135134/http://community-2.webtv.net/ajkristopans/CLYDEENGINEERINGCO/ {{EMD misc DH1 Experimental locomotives Diesel locomotives of the United States Shunting locomotives

See also

References