Rolling vehicle having collar with passively controlled ailerons

Patent metadata

Field	Value
Publication number	US-8993948-B2
Application number	US-201113215497-A
Country	US
Kind code	B2
Filing date	Aug 23, 2011
Priority date	Aug 23, 2011
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

A spinning, rolling, or roll-stabilized vehicle, such as a projectile, includes a fuselage that rotates about its longitudinal axis (spins) during flight. A collar is positionable relative to the fuselage to steer the projectile, with the collar having ailerons to provide a roll force to position the collar. The collar also has elevators to provide lateral force to steer the projectile. The positioning of the collar may be accomplished by moderating the roll force of the ailerons to hold the position of the collar substantially constant with regard to a longitudinal axis of the projectile. The ailerons passively change angle of attack with changes in the dynamic pressure of the projectile. At low speeds the ailerons have a relatively large angle of attack, and at high speeds, the ailerons resiliently reduce their angles of attack, avoiding large rolling forces on the collar.

First claim

What is claimed is:

1. An air vehicle comprising:
a fuselage that rolls about a longitudinal axis of the fuselage; and
a collar that is positionable relative to the fuselage;
wherein the collar includes ailerons that passively change angle of attack without a directed input force or commanded action, relative to a collar housing of the collar, as a function of dynamic pressure of the projectile, with the change in angle of attack involving aerodynamic forces on the ailerons be…

Assignees

• Geswender Chris E
• Vesty Paul
• Frost Geoffrey W
• Morgan Bruce E
• Strassman Doron
• Raytheon Co

Inventors

• Geswender Chris E
• Vesty Paul
• Frost Geoffrey W
• Morgan Bruce E
• Strassman Doron

Classifications

• F42B15/01

  Mechanical Engineering · mapped topic

• F42B10/64 Primary

  Mechanical Engineering · mapped topic