The article describes the powervane tunnelling machine, which is five times cheaper than American electrohydraulic alternatives. The powervane design incorporates two moving parts - a semi oscillating cutting head motor and a hollow spool propulsion ram. Unobstructed access through the core of the machine is a major advantage. The compressed air system is served by a 17 cu m/min capacity compressor at the surface supplying a 100 t shove capacity through the hollow spool pneumatic ram at the face. Other systems served by this power source are four 10 t steering rams, the muck scrabbler screw, conveyor and the lighting. The powervane has a self ventilating system, free of electrical equipment and is thus completely flameproof. The powervane has undergone three trials and the first production machine has now been built. (TRRL)

Media Info

  • Features: Photos;
  • Pagination: p. 28
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00307911
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 9 1981 12:00AM