wardialer
Posts: 1144
Joined: Fri Sep 14, 2001 1:08 pm

Percent Power On Take-off

Sat Sep 25, 2004 10:04 am

What percent power do the following aircrafts use on take-off roll?

B747-400
A340-300
B737-700
Gulfstream-V

On a standard day.
 
SATL382G
Posts: 2679
Joined: Sat Aug 14, 2004 12:02 am

RE: Percent Power On Take-off

Sat Sep 25, 2004 10:12 am

You need to give some more info... and the context of your question wouldn't hurt either.

Payload, range required, runway length and elevation, etc....
"There’s nothing quite as exhilarating as being shot at and missed" --Winston Churchill
 
PhilSquares
Posts: 3371
Joined: Sun Mar 28, 2004 6:06 pm

RE: Percent Power On Take-off

Sat Sep 25, 2004 10:19 am

On the 744 it depends on several factors such as runway length, obstacles in the climb path, temp, pressure alt, aircraft gross weight and flap setting.

Most airlines will attempt to use the lowest power setting required for takeoff. However, there can't be a reduction greater than a 25% reduction from full takeoff power.

Fly fast, live slow
 
XFSUgimpLB41X
Posts: 3961
Joined: Fri Aug 25, 2000 1:18 am

RE: Percent Power On Take-off

Sat Sep 25, 2004 11:58 am

On the CRJ the only variable for a standard full power takeoff is temperature.


Typically its around 90% or so.... flex thrust we usually will use an assumed temperature of 48-49 degrees C, which will reduce takeoff N1 to about 85%.
Chicks dig winglets.
 
G4Doc2004
Posts: 120
Joined: Thu Feb 19, 2004 7:49 am

RE: Percent Power On Take-off

Sat Sep 25, 2004 12:47 pm

Gulfstream GIV and GV use about 92% when using "power for the day" or full EPR power, and flex power is around 85-87%, depending on temperature, available runway, etc. Just as XFSUgimpLB41X stated above.
"Failure to prepare is preparing to fail"--Benjamin Franklin

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