Rate Gyro Unit

Technical Information

Catalogue No: C0570
Category: Gyro
Object Type: Sensor/Transducer
Object Name: Rate Gyro Unit
Part No: 11-018-01
Serial No: 003
Manufacturer: Honeywell
Division: Unknown
Year of Manufacture: 1972
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Mfd by Honeywell GmbH
Rate Giro Unit - Pitch/Yaw
Type DGD414C1
P/N 11-018-01
Series No. AF2
Spec. No. SP-P-41600
Serial No. 003
Date 4972
Mod. Status ABC...NOP


The command stability augmentation system: (CSAS) is by its very nature one of the most complex systems on Tornado. Hardly detectable in the cockpit, the CSAS keeps the ride comfortable at all speeds and altitudes, and makes the aircraft controllable throughout the flight envelope.It is a “fly-by-wire” system with autostabilisation, the pilot’s control demands being signalled and augmented electrically to maintain good handling qualities over the wide flight envelope. In the pitch axis, the fly-by-wire system has mechanical reversion. The system is triplicated and includes triplex computing, triplex rate gyros, triplex position sensors and a triplex accelerometer, with quadruplex outputs driving quadruplex electrohydraulic actuators. These “fly-by-wire” actuators were originally designed by Marconi-Elliott Avionic Systems Limited and have now been integrated by Fairey Hydraulic into the aircraft’s main hydraulic power control units.
The CSAS electronics is packaged in two units, the pitch computing circuitry being housed in a single computer and the roll, yaw and spoiler circuitry in a similar computer.
The system uses very high-precision analogue circuitry to provide accurately- matched control lanes, and a unique voter monitor design which reduces transient effects, due to system failures, to a low level and is so designed also that nuisance warnings are rare.
Marconi-Elliott Avionic Systems Limited has design leadership on the CSAS programme, but shared the production with Bodenseewerk Geratetechnik.
The system was designed to Specification SP-P-41600.

A rate gyro is a type of gyroscope, which rather than indicating direction, indicates the rate of change of angle with time. The gyro has only one gimbal ring, with consequently only two planes of freedom and is used to measure the rate of angular movement. This unit has a Pitch and a Yaw Rate Gyro in the same package (they are frequently collocated near the wing root). Three such units form part of the CSAS.
The manufacturer is marked as Elliott/Bodenseewerk but it was actually made by Honeywell.
This is an 'A' Model developed for MRCA, later Tornado.

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