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Taking Off With Tailwind  
User currently offlineBruce From United States of America, joined May 1999, 5036 posts, RR: 16
Posted (9 years 2 months 3 days 4 hours ago) and read 5235 times:

I recently took a second look at one of my window views.

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Photo © Bruce Leibowitz



We're taking off on 22, and there is a windsock out there that shows us going in the direction of the wind! What do you guys think based on this photo? Could that be for real? I thought that there was a 6kt limit on tailwinds for safe takeoff - that windsock looks like a bit more than 6kts! It appears to be pointed right in the direction we are going but could be slightly off but that is not taking off "into the wind"! There was no bad weather on that day and the ride was not unusually bumpy.

bruce


Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
5 replies: All unread, jump to last
 
User currently onlinePihero From France, joined Jan 2005, 4143 posts, RR: 76
Reply 1, posted (9 years 2 months 3 days 3 hours ago) and read 5187 times:
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The usual tail wind component limit is 10kts for most airlines.
There are even a few airfields where the local DGCA allows 15 kts (if there is only one direction for take-offs for obstacle clearance reasons).
According to your picture,the wind velocity is just under 10kts; Older pilots would tell you a straight sock is worth 15kts if stable.



Contrail designer
User currently offlineBruce From United States of America, joined May 1999, 5036 posts, RR: 16
Reply 2, posted (9 years 2 months 3 days 3 hours ago) and read 5167 times:

So then that is pretty close to the limit.... Maybe i should have said, what is the recommended limit on a 737-200 for takeoff tailwind?

Its probably ok for them because its a 732, but if that were an airport with bigger jets then they would have turned the pattern around by then, right?
I wonder if this is something that Southwest does a lot to save time....it was a very short taxi from the gate and 22 was close to the direction they needed to go....going to the other end and takeoff on 4 would add some time.

bruce



Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
User currently offlineWILCO737 From Greenland, joined Jun 2004, 8899 posts, RR: 76
Reply 3, posted (9 years 2 months 2 days 21 hours ago) and read 4785 times:
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Hi Bruce,

I fly 737's and the max tailwind component for take off is 10 kts, in some rare cases 15 kts. Tailwind in general is something you dont want for take off! It in creses your take off roll and your performance is less etc etc! but as you said: the way to taxi was shorten a lot and runway 22 is better for the destination... and if the runway is long enough and the other weather conditions are good then you can take off with tailwind up to the max component to safe time/fuel/money. For the take off calculation you consider the tailwind and then you are on the safe side, so no worries....  Wink/being sarcastic


WILCO737



It it's not Boeing, I am not going.
User currently offlineHAWK21M From India, joined Jan 2001, 31568 posts, RR: 57
Reply 4, posted (9 years 2 months 2 days 20 hours ago) and read 4774 times:

in some rare cases 15 kts
What would be these rare cases like.
regds
MEL



Think of the brighter side!
User currently offlineWILCO737 From Greenland, joined Jun 2004, 8899 posts, RR: 76
Reply 5, posted (9 years 2 months 2 days 18 hours ago) and read 4771 times:
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hi Hawk21M,

for example I fly for LH and we are allowed to take off with tailwind 15 kts on runway 18 in Frankfurt... thats pretty much the only case where we are allowed to do that....

WILCO737



It it's not Boeing, I am not going.
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