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Rotary Actuator

Technical Information

Catalogue No: C1163
Category: Flight Control
Object Type: Actuator
Object Name: Rotary Actuator
Part No: AE4742MK1
Serial No: 0444
Manufacturer: Lucas Aerospace/Marconi Avionics
Division: Unknown
Platform(s): Lynx 
Year of Manufacture: circa 1980
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Main Object Store

Lucas Aerospace Ltd.
Bradford, England.
Rotary Actuator
Type AE4742MK1
Serial No 0444
Stroke 60°
Load 44 lbf
A.C. Motors - Volts 115 Phase 1
Amps .15 Cycles 400
D.C. Clutch 25V
Potentiometer Volts +12.0, -12
Customers Code No 60-022-01
N.A.T.O. Code 6TU/6615-99-637-0008
Modifications Incorporated 1, 2 & 3
[white ink markings]
Mod ZY648
E.B.L.(T) Apr. 91.
GAv(R) LCSD 31


The British Army ordered over 100 Westland Aerospatiale Lynx for a variety of roles, from tactical transport to armed escort, antitank warfare , reconnaissance and casualty evacuation. The Lynx AH.1 first entered service with the Army Air Corps (AAC) in 1979.
Four Rotary Actuators form part of the Mk34 AFCS system which provides attitude stabilization in the pitch and roll axes. Stabilization demands are fed to limited authority series actuators which in turn drive the main powered flying controls. In the yaw axis the system operates as a yaw rate damping system to stabilise the aircraft during manual and automatic flight. The Rotary Actuators provide a rotary output of nominally ±60o for autopilot functions. They are controlled directly from the pilot’s stick switch in pitch and roll for trim adjustments in those axes.
Manufacturer: Marconi Elliott Avionics
Date: 1979-1989 and on
Division: FCD

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