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Forum: Tech Log

28th Jan 2016, 00:28

Replies: 4

B744 Descent ECON SPD v. SEL SPD - Effect on Descent Logic

Views: 2,766

Posted By cf6-80c2b5f

Any B744 FMS experts care to take a crack at this...

Any B744 FMS experts care to take a crack at this question?

Forum: Tech Log

27th Jan 2016, 01:01

Replies: 4

B744 Descent ECON SPD v. SEL SPD - Effect on Descent Logic

Views: 2,766

Posted By cf6-80c2b5f

One more clarifying question about this: ...

One more clarifying question about this:

Does it matter whether this is done prior to T/D or after it starts a descent. One person I talked to believes (and maybe correctly) that the first speed...

Forum: Tech Log

25th Jan 2016, 04:09

Replies: 4

B744 Descent ECON SPD v. SEL SPD - Effect on Descent Logic

Views: 2,766

Posted By cf6-80c2b5f

Thanks for the reply, Long Haul. This would...

Thanks for the reply, Long Haul.

This would explain the confusion and conflict among eveyone I've asked about this. Some guys insert a descent speed on VNAV 3/3 and some will let it descend in...

Forum: Tech Log

24th Jan 2016, 20:41

Replies: 4

B744 Descent ECON SPD v. SEL SPD - Effect on Descent Logic

Views: 2,766

Posted By cf6-80c2b5f

B744 Descent ECON SPD v. SEL SPD - Effect on Descent Logic

The B747-400 manual splits up the descent logic regarding how fast (or slow) the VNAV will allow the aircraft to go in order to stay on path based on whether you have passed (below) your first speed...

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