N1s

Noun

N1 (plural N1s)

1. The rotational speed of the low-pressure spool of a multiple-spool gas turbine engine, often expressed as a percentage of a certain reference rotational speed.
   • The load factor and engine N1 data fluctuations recorded on the FDR suggested that flight 587 encountered the wake of Japan Air Lines flight 47 for the second time between about 0915:50 and 0915:54 and that the motion of the airplane was affected by the wake vortex during this time.2004 October 26, National Transportation Safety Board, “1.16.2.2 Flight 587 Simulation”, in Aircraft Accident Report: In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587, Airbus...