Information is presented on the first gas-turbine-powered coach to be demonstrated in the UK - an American Greyhound with an allison gt404 turbine and automatic transmission. The coach, 40 ft long by 11 ft 3 in high and 8 ft wide, incorporates a toilet and reclining seats for 43 passengers, returning a fuel consumption of 5 1/2 miles per us gallon under fully laden conditions with a gross weight of 36000 lb or rather over 16 tons. The turbine is described as of the two-stage type with a twin-regenerator system which recycles heat from the gas path to pre-heat incoming air and at the same time cools the exhaust to no more than 500-600 deg F at full power. Developing 310 bhp, the torque at governed speed is 565 lb ft, and with a four-speed allison fully automatic gear box the fully laden coach will accelerate from 0-60 mile/h in 44 seconds. The power unit requires no water cooling system, has half the number of parts of the conventional diesel, weighs some half a ton less, and has a life of 500000 miles between overhauls. The power transfer is described as an hydromechanical system which also provides the braking effect on overrun and prevents overspeeding of the power turbine. Information is presented on the results of the field evaluation programme which has been operating since 1971, and on future developments which include the application of ceramic components to enable engines to operate at higher turbine temperatures, resulting in significantly lower fuel consumption. /TRRL/

  • Availability:
  • Corporate Authors:

    Travel and Transport Limited

    122 Newgate Street
    London EC1A 7AD,   England 
  • Authors:
    • Speed, J
  • Publication Date: 1978-7

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 35-37
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00184504
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 3 1979 12:00AM