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Shortest Runway Needed For A 737...  
User currently offlineCoolGuy From United States of America, joined Jan 2005, 414 posts, RR: 0
Posted (7 years 10 months 3 days 2 hours ago) and read 32767 times:

Sometimes I see the numbers on the side of the runway decreasing quite rapidly before a 737 I'm on lands: 9, 8, 7... When would a pilot need to abort a landing? (Suppose clear weather.) Sometimes it feels like the plane is just hovering a few feet above the runway (maybe due to the ground effect) and I always wonder if it's going to go back up. (That happened to me once but only because the plane never got clearance to land!)

6 replies: All unread, jump to last
 
User currently offlineChrisMUC From Germany, joined Jul 2006, 66 posts, RR: 0
Reply 1, posted (7 years 10 months 2 days 16 hours ago) and read 32767 times:

I can give you figures for the required landing distances of a B737-300:

60t (above our max. of 57.6)
dry runway: 1710m (flaps 40), 1790m (flaps 30)
wet runway: 1970m, 2050m
dry autoland: 2020m, 2100m
wet autoland: 2280m, 2360m

34t
dry runway: 990m (flaps 40), 1030 (flaps 30)
wet runway: 1140m, 1180m
dry autoland: 1300m, 1340m
wet autoland: 1450m, 1490m

Conditions: Sea Level, ISA, Zero Wind, Anti-skid operative, Automatic Speed Brakes
Definition of required landing distance:
The Required Landing Distance is the demonstrated landing distance divided by 0.6; demonstrated landing distance is based on a speed of 1.3xVs in landing config at the 50ft point; dry smooth level, hard surfaced runway; brakes fully applied, no thrust reverse.
Required landing distance wet is 1.15 times the dry one.

For emergencies actual landing distances are used (but you have to keep in mind that you won't reach the Boenig test pilots' values), for example:
One Engine Inoperative, Flaps 15 Landing, Standard Conditions, 46t: 820m
(1m = 3.281ft; 1t = 2204.6lb)

If you like the get more information - let me know. I have stand-by and am quite bored  Wink


User currently offlineCoolGuy From United States of America, joined Jan 2005, 414 posts, RR: 0
Reply 2, posted (7 years 10 months 2 days 14 hours ago) and read 32767 times:

I'm really wondering when a landing would be aborted if it doesn't touch down in time. Sometimes I see the airplane sort of hovering slightly above ground for a long time (well, longer than I would expect by looking out the window).

User currently offlineFlyf15 From , joined Dec 1969, posts, RR:
Reply 3, posted (7 years 10 months 2 days 13 hours ago) and read 32767 times:

Quoting CoolGuy (Reply 2):
I'm really wondering when a landing would be aborted if it doesn't touch down in time. Sometimes I see the airplane sort of hovering slightly above ground for a long time (well, longer than I would expect by looking out the window).

Landing requirements are based on the aircraft crossing the threshold of the runway at a certain altitude and airspeed and touching down within the touchdown zone. This usually means crossing the threshold at Vref with a decelerating trend, at 50ft agl, and touching down in the first 3000ft of the runway.


User currently offlineMighluss From Spain, joined Oct 2001, 959 posts, RR: 8
Reply 4, posted (7 years 10 months 1 day 23 hours ago) and read 32767 times:

A photo that appeared today...


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Photo © Ricardo Coppola



I think Santos Dumont is the shortest rwy, that receives 737's in a normal basis. It has just 4341 ft !!



Miquel.
User currently offlineFlynavy From , joined Dec 1969, posts, RR:
Reply 5, posted (7 years 10 months 18 hours ago) and read 32767 times:

I've seen private 737-200s operating in and out of Key West (KEYW) a few times. EYW's runway is 1463 by 30 meters. Dumont definitely has EYW beat, though. Just my two cents.

User currently offlineViscount724 From Switzerland, joined Oct 2006, 25999 posts, RR: 22
Reply 6, posted (7 years 10 months 8 hours ago) and read 32767 times:

Quoting Mighluss (Reply 4):
think Santos Dumont is the shortest rwy, that receives 737's in a normal basis. It has just 4341 ft

Boeing has developed special short-runway modifications for the 737NG, mainly to facilitate Gol's operations of the 737-800 to/from SDU with its very short runways ending in water at both ends. Related Boeing press release:

http://www.boeing.com/news/releases/2006/q3/060729a_nr.html


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