diesel-hydraulic

diesel-hydraulic (not comparable)

1. (mechanical engineering) Powered by a diesel engine via a hydraulic transmission.
   • 1961 March, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 153:

     In November 1959, a paper entitled "The Swindon-built Diesel-Hydraulic Locomotive" was presented to the Institute of Locomotive Engineers by Mr. G. E. Scholes and it contained some very interesting figures. One set was a comparison between the mileages achieved during a period of the first five months in 1959 by "King" and "Castle" 4-6-0s and "Britannia" 4-6-2s and those of D800 to D805, the first of the Swindon-built 2,000 h.p. diesel-hydraulic locomotives of the "Warship" class, then brand new and subject to the teething troubles of all such complicated units in the earliest stages of their use.

   • 2023 March 8, Howard Johnston, “Was Marples the real railway wrecker?”, in RAIL, number 978, page 52:

     The elimination of vacuum-braked wagons would be slowed down, and the Western Region's flirtation with diesel-hydraulic locomotives was questioned.

diesel-hydraulic (plural diesel-hydraulics)

1. (rail transport) A diesel-hydraulic locomotive.

• diesel-electric

• Category:Diesel-hydraulic locomotives on Wikipedia.Wikipedia
• “diesel-hydraulic”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.