Transport: Full Feathering

By changing the design of its propellers (deepening the pitch and adding a fourth blade), the S. S. Normandie last month recaptured the Atlantic speed record (TIME, Aug. 16). Even more striking are the results that have been attained in the last four years by changing the design of airplane propellers. Until 1933 there had been only two major improvements in the paper airscrew invented by Leonardo da Vinci some 450 years before to pull toy helicopters to the ceiling of his study. One was the Wright Brothers' development of a two-bladed '"prop" of...

Want the full story?

Subscribe Now


Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!