Textron Corporation

Bell Helicopter Textron Inc.

David A Popelka

Frank B Stamps

Richard Erler Rauber

Patrick R Tisdale

Thomas C Campbell

James L Braswell

Charles Eric Covington

Bryan Kenneth Baskin

Daniel Bryan Robertson

Ernst C Schellhase

Mithat Yuce

Charles L Hollimon

Keith Alan Stanney

Tom Donovan

Lawrence M Corso

Christopher Mike Bothwell

Thomas J Newman

Mark E Wasikowski

Michael J Southerland

Thomas C Parham

Michael R Smith

Troy Cyril Schank

Paul Branson Sherrill

Mark Adam Wiinikka

Cecil E Covington

Tommie Lynn Wood

John James Corrigan

Ron Measom

Peter H Kintzinger

Tricia Hiros

Floyd W Carlson

Jing G Yen

Michael L Hester

Richard L Bennett

John J Iii Corrigan

Ryan Smith

Mark Wasikowski

Keith Stanney

Tim Ledbetter

Paul Sherrill

Richard E Rauber

Thomas B Settle

A nodalized rotor system is provided for a multi-bladed helicopter. Equally spaced radial arms each have an inboard flapping section to accommodate beam-wise blade flapping and an outboard flex section to accommodate pitch changes. A blade is coupled to the end of each arm with a cuff and pitch horn rigidly connected to the blade and pivotally connected to its arm in the region of the flapping section. The blade has a concentration of weight over the section of blade extending from about 32% to 42% of the hub-blade radius of running weight four times the running weight at 50% of the hub-blade radius. Said blade has a reduced mass at outboard 30% of the hub-blade radius, at a level of 80% of the running weight at 50% of the hub-blade radius.

Nodalized rotor

A horizontal stabilizer structure for improved stabilizer performance at positive and negative angles of attack is disclosed in which a leading edge slat/spoiler extending lengthwise along the stabilizer is disposed forward and below the leading edge of the stabilizer. The leading edge slat/spoiler directs airflow along the under surface of the stabilizer at negative attack angles and disrupts airflow over the upper surface at positive attack angles.

Fixed leading edge slat spoiler for a horizontal stabilizer

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Bedford, TX, United States of America

David A Popelka