What is a Fuel Flow Transducer in Aircraft?
Fuel flow transducers came to be used in aircraft around the early 70s. Vibration of an aircraft engine. It also had to meet the important FAA regulation regarding blocked rotor pressure drop which could not be more than 1.5 times the spinning rotor pressure drop. Fuel flows can be measured via a conventional rotor-based fuel measurement system or, via the more modern fuel flow transducer - a digital-technology based system. The advantage of this new technology fuel flow measurement system is that, it is impervious to pressures and therefore the data is more accurate. The fuel flow transducer works upon a vane RPM sensor that is usually located behind the fuel filter and works in combination with the manifold air pressure (MAP). The fuel flow transducer produces a current-pulse signal from an opto-electronic pickup that's fitted with a preamp. The signal amplification enables it to measure fuel flow that is as low as 0.3 gal/hour and this makes it more accurate than the conventional fuel flow measuring systems.
Here's how the Fuel Flow Transducer works: The fuel enters the flow chamber within the fuel flow transducer and begins moving along a helical path. This is to vent out any vapour