cutback N1
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<P><FONT face=ARIAL, color=black size=2 Helvetica, Geneva>Hi,<BR><BR>During the climb, power is adjusted after N1. What is the correct value for a B733 after the initial climb (above 1500' AGL)?<BR><BR>Thanks</FONT></P></TD></TR></TBODY></TABLE>
<P><FONT color=black></FONT> </P><FONT color=black><FONT face=Arial>Bill, your phrase "power is adjusted after N1" doesn't seem to make sense. Perhaps you are looking for the value of N1 after thrust reduction altitude?<BR><BR>Any way, for a 737 (take the -800), takeoff thrust at sea level, 59 deg. F is typically set at 98%N1. for a typical climb profile (e.g.ICAO-A) profile, at a certain altitude (say 1500 ft) thrust is cutback to Max Climb thrust which for 737 is about 92%N1. Of course these are ball park figures only as thrust is a function of temperature, altitude as well as Mach (when in the air).<BR>Also I quote these numbers from memory. Don't hold me to it, please.<BR><BR>Hope it helps. Keep in mind that cutback profiles vary with airports as dictated by noise abatement requirements.</FONT><BR></FONT>
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