PPRuNe Forums - 737 NG rudder use

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flybubba

22nd Dec 2010 15:29

737 NG rudder use

Flight manual for NG states not to use rudder, except for crosswinds, engine failure, and trim. So does yaw damper automatically apply required rudder for coordination?

BOAC	22nd Dec 2010 16:53

'Co-ordination' is not needed for the rates of roll used and spoilers also provide.

aterpster

23rd Dec 2010 01:29

flybubba:

Quote:

Flight manual for NG states not to use rudder, except for crosswinds, engine failure, and trim. So does yaw damper automatically apply required rudder for coordination?

Those were the implicit instructions for jet transports from the 707 and DC-8 days.

But, it seems it took the AAL Airbus crash at JFK in Nov, 2001, to bring it to the fore.

JeroenC

25th Dec 2010 11:19

The 737 Autopilot has no rudder channel, so no rudder is being used for co-ordination

If no coordination is needed i don't know. I do know that the spoilers operate during turning. In the end, the turn IS coordinated.

Denti

25th Dec 2010 12:20

In fact the autoflight system for the 737 NG does have a rudder channel. If it is used however depends on the options ordered, it is a must for fail operational ones. It operates only during approach and go-around though and is therefore no use to any coordination effort.

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