Aerodynamic drag calculations are made for both internally and externally propelled vehicles travelling at constant subsonic speeds through long tubes of different diameters. The results indicate that the aerodynamic drag in a nonevacuated tube is always greater for an externally propelled tube-vehicle than for the same vehicle internally propelled, while in both cases the drag is greater than for the vehicle traveling in the open air. The propulsive power saving that can be attained for vehicles in evacuated tubes is indicated.

  • Authors:
    • Skinner, JHJ
  • Publication Date: 1969-5

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Filing Info

  • Accession Number: 00037194
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 20 1973 12:00AM