|Object Name:||Fuel Flow Rate Indicator|
|Year of Manufacture:||1975|
|Location:||Archive Object Store|
Indicator - Fuel Flow
Type No. 78-003-01
Ser No. 018/75
Spec No. SP.P.56150
Modification Record 01 02
The Marconi-Elliott Avionic Systems Limited fuel flowmeter system fitted to the MRCA 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 currently in service on VC10, Phantom and Harrier aircraft. For the MRCA, 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.