May as well have been! On a 744 with a full load of fuel for a long eleven hour flight, the weight of the fuel is over a third of the MTOW. This jet, going to Haneda, is only carrying enough fuel for a one hour flight plus reserves (and they wouldn't be much either - enough to divert to Narita and hold for 30 mins). So no surprise that her performance for the camera was sprightly. Man, you should have seen Qantas 747SPs (with RB211s btw) take off from Sydney en route to Brisbane. She was always off before the intersection. To infinity and beyond!
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz
Gkyip From United Kingdom, joined Apr 2006, 163 posts, RR: 0
Reply 7, posted (8 years 3 months 17 hours ago) and read 11889 times:
Quoting Zkpilot (Reply 3): Possibly a bit shorter than normal, but with a good headwind and light load its nothing unusual.
I think if you listen to the ATC, tower reports winds calm, so i'm putting it to a very light load, possibly even empty! It was very quick though, i'm sure i've been on A320s and 737s that have had longer TO rolls!
The strength of the turbulence is directly proportional to the temperature of your coffee
Flyfisher1976 From United States of America, joined Jan 2005, 804 posts, RR: 2
Reply 9, posted (8 years 3 months 14 hours ago) and read 11744 times:
Quoting Jawed (Thread starter): As far as I can tell this 747 goes from zero to rotation in about 20 seconds.
I counted 30 seconds on the clock in the lower rh corner from the beginning of the roll (see the runway sign "8" in lh part of frame for reference) to rotation (nose wheel leaves ground). Doesn't seem too unusual to me.
Vikkyvik From United States of America, joined Jul 2003, 10780 posts, RR: 26
Reply 10, posted (8 years 3 months 12 hours ago) and read 11687 times:
Anyone happen to know if that was an intersection takeoff? Looked like the 747 was lining up right around the aiming markers (somewhere between 1000-2000 feet down the runway). Is that something that's done at this airport?
DH106 From United Kingdom, joined Jun 2005, 627 posts, RR: 1
Reply 14, posted (8 years 2 months 3 weeks 5 days 23 hours ago) and read 11037 times:
Quoting PhilSquares (Reply 13): Heavyweight takeoffs aren't necessarilary done with flaps 20. Flaps 20 will get more weight off the runway (especially short) but you take a big hit in climb performance.
Generally speaking for most runways Flaps 10 will be more than enough to get the aircraft off at MTOW and have not take a hit on climb weights.
Can you not get the best of both worlds and do Flaps 20 until shortly after t/o then Flaps 10 for the climb? Presumably there's a strict retraction schedule for height/speed that precludes this?
...I watched c-beams glitter in the dark near the Tanhauser Gate....
PhilSquares From , joined Dec 1969, posts, RR:
Reply 15, posted (8 years 2 months 3 weeks 5 days 23 hours ago) and read 11019 times:
Quoting DH106 (Reply 14): Can you not get the best of both worlds and do Flaps 20 until shortly after t/o then Flaps 10 for the climb? Presumably there's a strict retraction schedule for height/speed that precludes this?
Simply no. Each airline has it's own SOP and furthermore, some airports have very specific ops procedures for flap retraction. In an ideal world, at 400' you would accelerate to flaps 10 airspeed, retract the flaps and go from there. However, most airlines use a clean up of 800' to 1000' as an engine out clean up altitude unless terrain dictates another altitude. As such, their 20 flap procedures are based on that altitude. I know of other airlines that stay at 20 flap until 3000'AGL and starts the retraction then.
It really boils down to each airline's SOP. But if you don't need the 20 flaps why bother in the first place?
Certainly V1 is higher with 10 flaps, tire speeds are higher, but the bottom line is it within the aircraft certification limits and available as an procedure. It always struck me as odd you'd use 20 flaps and redcued takeoff EPR/N1.
ImperialEagle From United States of America, joined Jan 2006, 2630 posts, RR: 20
Reply 16, posted (8 years 2 months 3 weeks 5 days 11 hours ago) and read 10815 times:
Back when KE's 744's were flying ATL-ORD-SEL, it was not unusual to observe them leaving ATL like a rocket!
I saw many of those flights roll a VERY short distance and leap off of the ground---climbing like the proverbial "Space Shuttle" and I'm thinking they did it in under 20 seconds---(although I never timed them)!
"If everything seems under control, you're just not going fast enough!"