FLY764 From United States of America, joined Mar 2005, 113 posts, RR: 3 Posted (9 years 1 month 3 days 14 hours ago) and read 4838 times:
Does anyone have any idea how much runway a 767-400 usually requires?The reason I ask is because I have flown on a Conti 767-400 about 3 times domestically and they always seemed to use up so much. On my last trip on one from LAX to IAH i was lucky enough to be seated on the left side when we took off from 25R at LAX which is 12,000 feet long and I was able to see how much we used using the markers that indicate how much runway is left. The back wheels were up when there was 5,000 feet left, so we used 7,000 feet of runway on a 764 only about 3/4 full on a day when the temp was about 60 degrees. This makes me wonder how a DL 764 which have more seats than Conti's get off the ground at LGA. Do they do the short field take off where they hold the brakes, rev up the thrust then release the brakes when taking off a 7,000 foot runway at LGA or is there some sort of other stipulation? Any help would be great, thanks : )
Tockeyhockey From United States of America, joined Feb 2005, 947 posts, RR: 0
Reply 1, posted (9 years 1 month 3 days 14 hours ago) and read 4790 times:
they might be attempting to calculate the slowest possible roll for their weight so as to maximize fuel efficiency. in other words, they might be able to take off in less runway if they needed to, but they are saving fuel by using the whole runway. faster acceleration would mean more fuel burn.
Phollingsworth From United Kingdom, joined Mar 2004, 825 posts, RR: 5
Reply 3, posted (9 years 1 month 3 days 14 hours ago) and read 4723 times:
On a hot (90F), wet day at SL (LGA / KLGA), USA - New York">LGA) the 764 can depart a 7000' runway at 370,000 lbs. This gives it a payload of about 75,000 lbs (assume OEW of 230,000 lb) out to 2000 nm, still air.
727EMflyer From United States of America, joined Mar 2005, 547 posts, RR: 0
Reply 4, posted (9 years 1 month 3 days 12 hours ago) and read 4596 times:
This should have posted in the tech/ops forum.
There are a lot of factors that go into T/O distance. You can get all the performance data off of boeings website. Keep in mind though that #seats does not indicate take off weight. I'm not familiar with where DL flies 764s to out of LGA, but if its not far, then they probably don't tank up on fuel. Perhaps your long run was due to a large cargo load or the plane may have been tankering, creating a heavy plane.
TFSPhoto From , joined Dec 1969, posts, RR:
Reply 5, posted (9 years 1 month 3 days 12 hours ago) and read 4552 times:
the CO 767-400's fly into Man, and id suggest they are pritty heavy on take-off with it being the only daily service from manchester (soon to be replaced by 2 daily services by 757's). If they use 24R for departure its 3047 x 45 and they use pritty much the whole lenght of the runway.
DesertJets From United States of America, joined Feb 2000, 7737 posts, RR: 16
Reply 8, posted (9 years 1 month 3 days 9 hours ago) and read 4322 times:
Quoting AA61Hvy (Reply 6): I remember watching Anet member JCS17's 764 of CO take off at EWR to IAH this summer, it used more runway than a CO 777 to TLV and a 742 of Katallia to OST. It was interesting to watch.
How much runway do you think the plane would have used if JCS wasn't onboard?
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia
AA737-823 From United States of America, joined Mar 2000, 5638 posts, RR: 11
Reply 9, posted (9 years 1 month 3 days 7 hours ago) and read 4179 times:
BACK to the original question...
I suspect he was doing a very derated takeoff. If you don't need to heat the thing up so much, you're better off not to. Save fuel, save maintenance, lower noise, et cetera.
AirWillie6475 From United States of America, joined Jan 2005, 2448 posts, RR: 1
Reply 10, posted (9 years 1 month 3 days 6 hours ago) and read 4142 times:
I don't know how much runway is needed but they obviously don't use full power on take-off on a 12k foot runway. The pilot just wanted to have a slow takeoff probably. I also think that 7000 feet is not too much runway used on takeoff.