Fixed engine and rotating proprotor arrangement for a tiltrotor aircraft

US9174731B2 · kind B2 · utility

Assignee

• Bell Helicopter Textron Inc. · US

Inventors

• Brent Chadwick Ross · Flower Mound, US
• David R. Bockmiller · Fort Worth, US
• John Richard McCullough · Hudson, US
• David G. Carlson · Oosterdijk, US

Key dates

• Filing date: Aug 14, 2013
• Grant date: Nov 3, 2015
• Expiry date: Nov 7, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C29/0033
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A tiltrotor aircraft includes a fuselage; a wing member having a first rib, a second rib, a first spar, second spar; and an upper wing skin; an engine disposed at a fixed location relative to the wing member; and a proprotor having a spindle gearbox, rotor mast, and a plurality of rotor blades drivable in rotation about the rotor mast, the spindle gearbox being rotatable about a conversion axis. The spindle gearbox is located above the upper wing skin of the wing member.