Defence Aerospace

Fuel Metering Units - FMU

Fuel metering unit with controls and datas streams

High accuracy flow metering for optimised engine performance and efficiency.

Our FMUs are used to control the quantity of fuel delivered to an engine’s combustion system. Robust and reliable, they offer a highly accurate fuel metering capability that enables an engine to achieve optimum performance.

This high level of accuracy is achieved thanks to our novel, patented SmartCal technology, which allows the FMU to provide the Electronic Engine Control (EEC) with a precise calibration that is unique to each unit.

Our FMUs are built to withstand the high fuel temperatures of modern aircraft, as well as being capable of tolerating the by-products of fuel break-down. The units also enable in-flight engine re-starts at exceptionally low pump speeds (down to 4% of rated pump speed).

We have over 70 years of fuel control experience. Our FMUs have been used on a range of applications, from small auxiliary power units to the largest engines – in each case helping the customer to optimise performance, increase efficiency and reduce operating costs.


Patented Electronic SmartCal™ Technology

Our units feature our patented electronic SmartCal technology, which provides the EECs with unique calibration for each specific FMU fitted to the engine. This enables us to provide a more accurate fuel metering capability.

SmartCal provides a number of benefits, including reduced build time (and hence lower cost). On certain applications the engine manufacturers have been able to rely on our FMUs' accuracy and eliminate the separate flow meters that are usually fitted to the engines.

Operating in a harsh environment

FMUs have to operate across a wide fuel temperature range, typically -54°C to over 180°C. Our units feature built-in thermal compensation and avoid both the temporary and permanent changes in calibration that can result from changes in temperature.

Our units are also robust to the by-products of fuel break-down, ensuring reliable performance maintained even at extreme temperatures.

Contact us

To find out more information or to arrange a demonstration of our solutions & capabilities, contact a member of our team today.