Could a 757-200 land on a runway 2600 ft long?
 

Last week a Britannia 757-200 almost landed at our local airfield, instead of at the larger international one. In our gliding club we are heavily debating whether it could stop in 2600 ft or not provided it landed exactly at the beginning. With brakes set to max auto and at the slowest speed would it be a possibiliy? Anybody have any info on this, preferably some performance charts?

Martin

My old DC-8 will have a ground roll of about 2400 feet under those conditions at sea level, zero wind. (We've proven that in actual flight testing.) I'm sure the 75 will do even better.

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never touched a 75' bit I'll go out on a limb and say it'd come pretty close, through in a bit of H/W, (or even better 30 kt) and you might just have it. Mind you, there isn't too many jets stonking around out there at min landing wt.

Probably - but only once!!

Sounds like there's a chance of it landing in 2600'. The question I'd be asking is would it get out!!!

Definitely can't dispatch to a 2600 ft runway. Boeing Ops Manual Landing data chart starts at 3,000 ft.

Mutt

Hate getting the ol books out but according to my Pilots Ref Manual it would be quite possible to stop the aircraft on that distance.. Example at 82.5 tons (typical lndwt) flaps 30 at vref30 from 50 ft zero wind at SL and observe, as always no reverse thrust as this is a performance calculation.. The thing would stop at 2453.125 ft
The real trick would be to get the b****rd out of there.. :)

Might I ad that those numbers are demonstrated by Boeing testjocks and are therefore factored for us normal mortals by 1.92 so you won´t find those numbers in the book but it still is technically possible to stop the darned thing allthough i´d rather not try it.. :)

From Boeing Ops manual.

Unfactored landing distance with Ctr Hyd system inop (which shouldn't affect landing distance at all) 2745' (yes ft) at 86000kg, including distance from 50' (ie 1000ft of air distance).

ie will STOP in 1745' (-50'/2000kg lighter and other factors for wind etc...)

Bet he's glad he went around though!!

2745 or 1745 feet? Big difference!

Martin

It would have been interesting to see. Landing an Airbus on a 5000 feet runway is exciting enough for me.
Anyway, never mind the length of the runway he "nearly" landed on, tell us more!
How did he come to nearly land there, what is meant by "nearly" landing there, I mean, how close did he get? What was he doing?
Where was he meant to be landing?
Come on then, dish the dirt :) :)

Brenoch

Will you please explain your statement:

therefore factored for us normal mortals by 1.92

I know that there is a rule that for dispatch you must be able to land in 60% of the available runway, but i have never heard of an increase to the actual stopping distances?

Thanks.

Mutt http://www.pprune.org/ubb/NonCGI/cool.gif

[This message has been edited by mutt (edited 04 October 2000).]

Mutt: The landing distance demonstrated by the boeing testpilots (i dunno exactly how many shots they had at doing them) was multiplied by 1.92 as to compensate for our shortcomings in handling the aircraft compared to the testjocks.. The figures where all done by boeing but they are in my company just used as a rule of thumb.. We normally don´t operate to fields where landing distance is a factor as much as the takeoff performance but still.. Gives us a ballpark idea of what turnoffs we can use etc.

av8er: I do think a C hyd inop would affect landing distance since some of the spoilers would not be operational..

Brennoch,

I agree, Spoiler panels 1 and 12 will probably not deploy. However, I suspect this is marginal as the lift would probably dump with 10 almost as well as with 12.

Extra distance for no speedbrake (from Flight Crew Training Manual) is 800-1400'. In any event, the thing will stop real quick in less than 1745'.

Pretty impressive if you ask me.

Martin, tell me a bit more, where and when was this?????

It happened here in Norway. My local airport (ENJB) and the airport it was supposed to land at (ENTO), lie within 5 miles of each other, in fact my local airport has same runway headings and lies within the TMA of ENTO, or Torp. The PIC was presumably familiar with the area, but being swedish one never knows :)
Incidents like this have happened before, but luckily aircraft have never landed at the wrong airport.

Martin

Martin.. Have an idea of how many times this has happened before at ENTO??

av8er: The 757 is all the way around an impressive piece of kit.. Makes you smile everyday you go to work, doesn´t it?? :) :)

It certainly is an impressive piece of kit. I remember getting a jumpseat ride in one a few years back from ABZ-LHR. The captain explained to me during the taxi out to Runway 35 that we would be using full power on take-off.

The rocket-like take-off run was in the region of 1800 feet and we managed a climb rate of around 5000 ft/min!

Amazingly our crusing level for this flight was FL410! We were there for about 2 minutes.