Scheduling the pitch of the fan blades has no impact upon the position of the fan working lines, but can be used to move the surge line upwards, to improve fan surge margin.
12.
Surging lines at food charities through the following winter eventually prompted Congress to restore food stamps for immigrant children, the disabled and the elderly, but hundreds of thousands of immigrants remain without food stamps altogether.
13.
Consequently, the cold nozzle is likely to be unchoked, resulting in a highly curved operating line, significantly closer to the surge line than the high speed cruise operating line, resulting in a lower fan surge margin particularly at low thrust settings.
14.
In category B ( 2 + 3 + 4 ) is the surge line, which connects the hot leg with the pressurizer and helps to control the pressure in the primary loop of a PWR and uses a moving working fluid when fulfilling its mission.
