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-   -   B747-400 info requested (https://www.pprune.org/tech-log/222053-b747-400-info-requested.html)

Hedncld 17th Apr 2006 14:33

B747-400 info requested
 
I have a simulator check coming up for an interview in the -400.
I'm wondering if somebody knows the pitch power setting for 747-400 at 594000lbs
250knts pitch ??? Epr????
280kts pitch??? Epr???
ILS 160knts pitch??? epr???
Also Engine failure any gouge of rudder trim setting for outboard engines?
Thanks in advance-any help is very much appreciated.

Hand Solo 17th Apr 2006 14:49

Off the top of my head for 160kts on the ILS, gear down, Flap 20, use 2.5deg pitch. For EPR I use gross weight from the FMC to determine required EPR, eg GW=240T, use 1.14, GW=280T, use 1.18. Not quite so easy to use if you're working in pounds rather than kilos.

For engine failure of an outboard about half rudder trim seems to be a fairly good starting point and adjust accordingly.

Can't help you with the 250 and 280kts level without my notes but I just use the flight path vector anyway!

Hedncld 18th Apr 2006 02:51

Thanks for the reply. Any info on trim for engine out work??

eckhard 23rd Apr 2006 13:05

7 units of rudder trim for an outer failure at V2, reducing to 3 units at 250kts. The 3 units will also be good for the approach. If you G/A, use 7 again or just hold the pressure until you accelerate and reduce power.

skiesfull 23rd Apr 2006 16:21

Instead of flying by numbers, why don't you try flying by feel and trim? If the control column is level and the correct rudder displaced with no heading deviation, then you must have the correct displacement for an engine out situation. Always remember that especially in the simulator, scan rate must be increased and the aircraft correctly trimmed - if not, you will be fighting the aircraft instead of thinking ahead, while flying accurately. Flying by predetermined numbers has distinct dangers. ATB for your check.

Phil Squares 23rd Apr 2006 16:38


Originally Posted by Hand Solo
Off the top of my head for 160kts on the ILS, gear down, Flap 20, use 2.5deg pitch. For EPR I use gross weight from the FMC to determine required EPR, eg GW=240T, use 1.14, GW=280T, use 1.18. Not quite so easy to use if you're working in pounds rather than kilos.
For engine failure of an outboard about half rudder trim seems to be a fairly good starting point and adjust accordingly.
Can't help you with the 250 and 280kts level without my notes but I just use the flight path vector anyway!

Hand Solo, that's all well and good but flaps 25/30 are the only landing flap configuration on the 744. Generally at 250T Flaps 30 1.08 will be close, if you're heavier 1.12 or so will be a "ballpark" figure.

I agree with Skiesfull, just fly the aircraft and don't worry about trying to outwit the simulator.


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