Patent · US Active

Rotorcraft rotor and propeller speed

US10640203B2 · kind B2 · utility

1Cited by

52References

4Claims

0Family size

Assignee

SIKORSKY AIRCRAFT CORPORATION · US

Inventors

William J. Eadie · Cheshire, US
Patrick Devin Boyle · Orlando, US

Key dates

Filing date	Oct 1, 2015
Grant date	May 5, 2020
Priority date	—
Expiry date	Apr 21, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/10
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

An aircraft includes an airframe having an extending tail, a counter rotating, coaxial main rotor assembly disposed at the airframe including an upper rotor assembly and a lower rotor assembly, and a translational thrust system positioned at the extending tail and providing translational thrust to the airframe, the translational thrust system including a propeller. A gearbox system is operably connected to the main rotor assembly and the propeller to drive rotation of the main rotor assembly and the propeller. The gearbox is configured to maintain a main rotor assembly tip speed below Mach 0.9 and a propeller helical tip speed below Mach 0.88.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.