Fuel Flow Transmitter Cut-Away Demonstrator

Technical Information

Catalogue No: C0236
Category: Fuel Systems
Object Type: Sensor/Transducer
Object Name: Fuel Flow Transmitter Cut-Away Demonstrator
Part No: None
Serial No: None
Manufacturer: Marconi Avionics
Division: Unknown
Year of Manufacture: circa 1972
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Marconi Avionics Limited
Code 0656


The Marconi-Elliott Avionic Systems Limited fuel flowmeter system fitted to the Tornado comprises two engine-mounted true mass transmitters and a twin channel computer/indicator, which displays left and right engine flow rates on concentric pointers.

The transmitters apply measurement techniques similar to the Marconi-Elliott Avionic system supplied for the VC10, Phantom and Harrier aircraft. For the Tornado, however, a turbine is used as the driving element in place of the conventional electric rotor. Turbine speed is controlled by a spring-operated valve, which allows some fuel to by-pass the turbine at high flow rates.

This new design feature has improved transmitter reliability, significantly reduced transmitter size and weight, eliminated the need for an electrical power supply and, allied with improvements to the pulse pick-off, has allowed the transmitter harness to be reduced to three wires in an enveloping screen.

System development was conducted by Marconi-Elliott Avionic Systems Limited at Rochester. In production the system was also manufactured by Teldix of Germany and OMI of Italy under the work sharing agreement.

This is a cut away version of the related item (revealing its interior operation) and is presumed to be from a similar date. The underside view shows two rotor sensors S1 & S2 that sense the passing of rotor's magnetic inserts M1 & M2.

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