WATER JET DRIVES ROCK DRILL

A MINING DRILL RIG DRIVEN BY WATER IS REPORTED IN THE SOVIET TRADE NEWSPAPER TRUD. APPARENTLY A JET ENGINE IN EACH OF FOUR CYLINDRICAL HOUSINGS BEHIND A CLUSTER OF ROCK DRILLS DOES THE WORK. EACH CLUSTER OF BITS ROTATES AT ABOUT ONE THOUSAND RPM. ACCORDING TO THE REPORT, THE DRILLING MACHINE HAS CHEWED A 20.3-FOOT TUNNEL THROUGH SOLID ROCK FOR OVER HALF A MILE. SOME DAY THE RUSSIANS HOPE TO TUNNEL STRAIGHT DOWN TO THE EARTH'S MANTLE.

  • Supplemental Notes:
    • Vol 38, No 24, P 54, 2 PHOT
  • Publication Date: 1967-11-20

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  • Accession Number: 00214758
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 24 1994 12:00AM