|Object Name:||Typhoon Fuel Flow Transmitter|
|Division:||Flight Systems [FSD]|
|Year of Manufacture:||circa 1995|
|Location:||Main Object Store|
GEC Avionics Ltd. K0656
Fuel Flow Transmitter
A Fuel Flow Transmitter measures the rate of flow and converts this to an electrical signal to drive a meter or other equipment. In this Transmitter 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 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.
The original Tornado Turbine Driven True Mass Flowmeter Trans¬mitter was fitted to DAI and DA2 with RB199 engines.
A Dry Fuel Flowmeter was initially fitted to the EJ200 engine. This was de¬velopment of the Tornado flowmeter to meet the EJ200 engine require¬ments and it first flew on the DA3 aircraft.
A new Total Fuel Flowmeter was however, required to measure very high dry/ reheat mass fuel flowrates with extremely low pressure drop and high resistance to fuel contamination debris. This was the unit fitted to production aircraft.
This unit is a Dry Fuel Flowmeter initially fitted to the EJ200 engine.