| 摘要 |
<p>A fuel metering unit 10 for an aircraft. The unit 10 having an inlet leg 12 within which fuel flows, which leg 12 splits into controlling legs 18, 20 which rejoin downstream to form an outlet leg 30. Shut off valves 28, 30 are provided respectively in the controlling leg 18 and outlet leg 30. Fuel flow through the legs 18, 20 is compared, and if an unexpected relative comparison is made, fuel flow through one or both of the legs 18, 20 can be stopped using respectively either of the valves 28, 32.</p> |
