andyinpit
Posts: 147
Joined: Fri Sep 14, 2007 10:45 am

Crosswinds And The 737 Question

Fri Feb 19, 2010 8:35 pm

Today (2/19) at BWI, they were running west ops (dep 28 land 33L and 33R) and from about 10 am on the winds were anywhere between 290-310 ranging from 15 to 30 kts. There was a US 737 who was raising all hell because he wanted to land on 28. The controller wasn't able to give him 28, unless he was willing to go around to get vectored (and make space for the line of flights waiting to depart). At the time of the incident the winds were being reported 290@19. Now I'm not a pilot, and don't pretend to be one, but is a 19 knot crosswind really that serious? Was it putting the safety of his airplane at risk as he was claiming? Just curious
 
avroarrow
Posts: 804
Joined: Wed Sep 19, 2001 10:40 am

RE: Crosswinds And The 737 Question

Fri Feb 19, 2010 8:49 pm

Well using this handy online gizmo:
http://www.csgnetwork.com/avxwindfactor.html
The headwind factor would be about 15 kts and the X-wind would be about 12 kts, assuming a rwy heading of 330 and a wind from 290. Although the runway heading is magnetic north while the winds would be reported in true I believe so there is some room for variation with the calculation.
Anyway, I don't know about a 737 but a Cessna 172 can handle 12 kts of X wind so long as the pilot can hold it together.
Give me a mile of road and I can take you a mile. Give me a mile of runway and I can show you the world.
 
swiftski
Posts: 1837
Joined: Tue Dec 19, 2006 6:19 am

RE: Crosswinds And The 737 Question

Fri Feb 19, 2010 10:58 pm

Quoting AndyinPIT (Thread starter):
Today (2/19) at BWI, they were running west ops (dep 28 land 33L and 33R) and from about 10 am on the winds were anywhere between 290-310 ranging from 15 to 30 kts. There was a US 737 who was raising all hell because he wanted to land on 28. The controller wasn't able to give him 28, unless he was willing to go around to get vectored (and make space for the line of flights waiting to depart). At the time of the incident the winds were being reported 290@19. Now I'm not a pilot, and don't pretend to be one, but is a 19 knot crosswind really that serious? Was it putting the safety of his airplane at risk as he was claiming? Just curious

What was the rest of the weather like? If braking action is good the 737 had a demonstrated xwind limit of 35kts. If braking action is medium/poor then the limit goes down to 20kts. If it was gusty (you say it was) then the winds are less predictable, and why risk it?
 
cobra27
Posts: 939
Joined: Wed May 23, 2001 6:57 pm

RE: Crosswinds And The 737 Question

Fri Feb 19, 2010 11:29 pm

Quoting AndyinPIT (Thread starter):
Was it putting the safety of his airplane at risk as he was claiming? Just curious

Some pilots just have their own stupid habits.
In Slovenia on LJLJ airport sometime they fly over airport and then land on ILS 31, even though the conditions are VFR and there is no traffic. Probably it is mandatory, but sure is stupid and wasteful economically and enviromentally
 
andyinpit
Posts: 147
Joined: Fri Sep 14, 2007 10:45 am

RE: Crosswinds And The 737 Question

Fri Feb 19, 2010 11:40 pm

Quoting swiftski (Reply 2):
What was the rest of the weather like?

better than 5000/5, just very windy. And I get the whole why risk it thing, but is it really that much of a risk? I'm just trying to get a pilots perspective on it. He was making it out to be the worst thing in the world, but I've seen much stronger, direct crosswinds.
 
dw747400
Posts: 1091
Joined: Wed Aug 15, 2001 8:24 am

RE: Crosswinds And The 737 Question

Sat Feb 20, 2010 2:16 am

Crosswinds in that range are fairly common at BWI on days like today. Departures off of 28, landings on the 33's. When the wind gets up there, it is hardly optimal, but I haven't heard a 737 driver complain about winds like that. Of course, there could be other factors. The runway could be wet from melting snow, the large gust factor could have concerned him, his company op specs might be more restrictive, etc...
CFI--Certfied Freakin Idiot
 
seven3seven
Posts: 271
Joined: Wed Apr 27, 2005 6:55 am

RE: Crosswinds And The 737 Question

Sat Feb 20, 2010 7:24 am

Im guessing he wanted to save time. When arriving from the north or east they take you all the way around the southeast side of Baltimore for long final to 33L.

He probably just wanted to cut a few minutes off.
My views are mine alone and are not that of any of my fellow employees, officers, or directors at my company

Who is online

Users browsing this forum: EIASO and 17 guests