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The Boeing Company

Grazyna Balut Ostrom

Peter K Rudolph

Kevin S Brown

Kenny L Fung

Shahrokh Ghayem

Kevin Brown

A system for detecting and correcting a thrust control malfunction in an aircraft engine. The system includes an electronic engine control (EEC) unit that includes a first processing subsystem and a second processing subsystem, and a thrust control malfunction accommodation (TCMA) circuit included in the first processing subsystem and the second processing subsystem. Additionally, the system includes a TCMA software package executed by the first processing subsystem and the second processing subsystem, thereby providing redundant execution of the TCMA software package.

Thrust control malfunction accommodation system and method

A turboprop propulsion system where there is a core engine driving a power turbine that is connected through a planetary drive transmission to first and second counterrotating propellers. One of the propellers is connected to the ring gear, while the other propeller is connected to the planetary carrier, the sun gear being driven from the power turbine. The apparatus is provided with a substantially continuous gaseous flow path from the inlet to the exhaust nozzle of the engine, with the planetary drive transmission being spaced radially from the flow path. In some embodiments, the planetary transmission is positioned radially inwardly of the flow path, while in other embodiments, it is positioned radially outwardly of the flow path. The propellers can be in either the pusher configuration or the tractor configuration.

Turboprop propulsion apparatus

There is a core engine having a turbine section which is drivingly connected to a single propeller through a planetary transmission. The core engine provides a substantially continuous, axially aligned gaseous flow path from the inlet to the discharge nozzle, with the planetary drive being spaced radially from the flow path. In one configuration, the planetary transmission is spaced circumferentially around the flow path, while in another configuration, it is positioned inside of the annular flow path. The engine is ranged in both a tractor and a pusher configuration.

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Auburn, WA, United States of America

Grazyna Balut Ostrom