A description is given of the development of the swing-beam engine concept by Armstrong Whitworth. The design provides a compact high-speed engine offering almost perfect balance resulting from opposing forces being on the same axis so eliminating frame vibration and noise. The basic mechanism comprises a pair of vertical rockers with a three-throw crankshaft between them; the lower ends of the rockers are pivoted in bearings and the other ends attached to the pistons. The crank throw is only a quarter of the piston stroke instead of the usual half as on conventional engines. The opposed piston design does not dictate the combustion system as it is suitable for spark ignition or diesel, two- or four-stroke. For automotive application the swing-beam engine is considered as a two-stroke working on a diesel cycle with a weight of 2 kg/kw compared with 4 kg/kw for current automotive units, and combined with good fuel consumption and combustion characteristics. /TRRL/

  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Tryhorn, D W
  • Publication Date: 1979-2

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 65-67
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195040
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 28 1979 12:00AM