Issue 30 - Summer 1991

  • Review of Developments in Human-Powered Helicopters
    Akira Haito
    1
  • Kremer Prizes
    6
  • Front-Wheel-Drive Recumbent Bicycles
    Michael Eliasohn
    11
  • Front-Wheel-Drive Bicycles
    Marek Utkin
    15
  • Johan Vrielink and the Flevo Bike
    Ton ten Brinke
    15
  • Cha-Cha Bike
    Bernd Zwikker & Bram Moens
    16
  • Olon Belcher's FWD
    Michael Eliasohn & Randy Gilmore
    17
  • Front-Wheel-Drive Recumbents
    Tom Traylor
    18
  • Design and Flight Testing of the Airglow Human-Powered Aircraft
    J. McIntyre
    20
    Book Reviews
  • Form & Function of the Baidarka by George B. Dyson
    David G Wilson
    10
  • Bicycle Technology by Rob van der Plas
    Michael Eliasohn
    10
    Letters
  • Bicycle fairings and efficiency
    Brian R. Spence
    3
  • Foil-Propelled boat
    Trond Are Oritsalnd
    3
  • Linear drives
    Ray Wijewardene
    3
  • The Most Significant Invention..
    4
  • Fatigue Data, Aluminum and Composities
    Peer Frank
    4
  • Tandem Pedaling Paddlewheels
    John C. Whitehead
    5
  • News from the VP-Air
    Chris Roper
    5
  • Recumbents And the UCI
    John Riley
    5
  • Land-Skates in China
    Yangben Guo
    6
    Editorial
  • Newtons, Pascals, and Pounds
    David G Wilson
    2
  • European Fashions
    David G Wilson
    2

Issue 30 may be downloaded by clicking on the icon.Download Scanned PDF file