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Optimum speed tilt rotor

  • US 6,641,365 B2
  • Filed: 10/24/2001
  • Issued: 11/04/2003
  • Est. Priority Date: 02/20/1998
  • Status: Expired due to Term
First Claim
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1. A method for improving the efficiency of a rotorcraft for a specific flight condition, the rotorcraft comprising a rotor having radially extending blades and an engine for providing power to rotate the rotor, wherein the rotor operates at an RPM level between and including a maximum rotor RPM level and a minimum rotor RPM level, the method comprising:

  • ascertaining an RPM level for improving efficiency for the specific flight condition; and

    adjusting the RPM of the rotor to the ascertained RPM level wherein said ascertained RPM level is less than 94% of maximum RPM.

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