Tristar100 From United Kingdom, joined Jul 2004, 309 posts, RR: 0 Posted (9 years 5 months 1 week 4 days 3 hours ago) and read 1862 times:
I have noticed that when any Malaysian B747 takes off it seems to fly itself off the ground rather than rotate with the tail going close to the ground. I watch them regular at Manchester on take off and every time they just seem to glide off the ground. Is there any reason for this, perhaps different company guidelines on speeds etc.....
AJ From Australia, joined Nov 1999, 2380 posts, RR: 26 Reply 2, posted (9 years 5 months 1 week 2 days 22 hours ago) and read 1574 times:
Interesting you should mention this, I watched 9M-MPL depart from runway 34L here in Sydney a little while back, and it departed in a very flat attitude as seen here. The subsequent Qantas departure was slightly more 'normal' as seen here.
GunFighter 6 From Netherlands, joined Jan 2001, 404 posts, RR: 0 Reply 5, posted (9 years 5 months 1 week 2 days 11 hours ago) and read 1503 times:
I might have an explanation, but it can more then one reason.
For all commerical jets it is nesecary to achieve a screen height of 35ft at the end of the rwy. The Malaysian might be heavy, and the weather might be hot.
It therefore could choose a higher flap setting. it would rotate earlier, but climb out flatter. If there are no obstacles in the vicinity there would be no problem.
In a nutshell it comes down to this: Less flap setting: longer roll, steeper climb-out path.
More flaps: shorter ground roll, but a more flat climb out path.
AJ From Australia, joined Nov 1999, 2380 posts, RR: 26 Reply 6, posted (9 years 5 months 1 week 2 days 9 hours ago) and read 1487 times:
The 747-400 is only certified for Flap 10 or Flap 20 departures. The Qantas aircraft in the photo I linked above is conducting a Flap 20 departure, as do all Qantas -400s. Doesn't quite work unfortunately!