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Forum: Tech Log

3rd Aug 2015, 15:57

Replies: 23

B747-400 VNAV PTH Descent Speed

Views: 6,085

Posted By Avinthenews

The 744 and -8 have exactly the same speed band,...

The 744 and -8 have exactly the same speed band, the only difference is it's actually on display on the -8 PFD speed tape, like the A330/340 etc have had for years.

As others have added "drag...

Forum: Tech Log

3rd Aug 2015, 07:15

Replies: 23

B747-400 VNAV PTH Descent Speed

Views: 6,085

Posted By Avinthenews

As long as it's in the speed band nothing happens...

As long as it's in the speed band nothing happens no messages, however if it's approaching a speed limit waypoint and it's carrying excess decent speed it's smart enough to say look I'm in path but...

Forum: Tech Log

3rd Aug 2015, 05:26

Replies: 23

B747-400 VNAV PTH Descent Speed

Views: 6,085

Posted By Avinthenews

From memory it will fly anywhere between 15 knots...

From memory it will fly anywhere between 15 knots below programmed DES SPD to VMO -16kts and stay in PTH, outside that it'll either add thrust (SPD-PTH) or it'll say drag required prior to...

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