| 摘要 |
<p>The invention concerns an aircraft propulsion control system in which multiple gas turbine engines 10 are under the control of a controller 30. One or more sensor 20 is arranged to sense a condition indicative of vapour trail formation by an exhaust flow from one or more of the engines. The controller is arranged to be responsive to a thrust demand 51 for the aircraft and to control the thrust produced by each of the engines concurrently so as to alter the efficiency of the engines upon sensing of the vapour trail formation condition. The controller may output a separate throttle control signal 35 to each engine. The total thrust produced by the plurality of engines may equal the thrust demand, wherein each engine contributes a different proportion to the total thrust. The controller may be arranged to vary the thrust level of each engine to suppress contrail formation only during one or more of; aircraft cruise conditions, passage through a region of ice super saturated air and/or night.</p> |
