PPRuNe Forums - View Single Post - Emirates B777 gear collapse @ DXB?
View Single Post
Old 30th Aug 2016, 21:58
  #1130 (permalink)  
Datum
 
Join Date: Feb 2006
Location: Down Under
Posts: 99
Likes: 0
Received 0 Likes on 0 Posts
Dubai Airport integrated weather forecasting/reporting system:

http://radiometrics.com/data/uploads/2012/11/Dubai_AWDSS.pdf

Technical Spec for Viasala Automated Weather Sensor (AWS):

http://www.vaisala.com/en/products/windsensors/Pages/WM30.aspx

Wind should be +/- 3 deg?.. However, this is rounded to nearest 10 deg for METAR purposes and possibly for tower/approach reports to pilots.. The height of the A380 capable hangars is at least 25m..more like 30m.. Distance from runway is approx 420m..

What was the wind speed and direction (vector) at the top of those hangars, moments prior to the aircraft crossing the threshold, initiating the flare, initiating the go-around, settling on to the Runway?.. Was the wind measured at 10m, different at various positions along Runway 12L?.. The geometry of the airport suggests to me that if the wind had ANY easterly component, Runway 12L is more likely to experience mechanical turbulence associated with the maintenance infrastructure?.. The question is, how much Turbuelence/Windshear based on the direction and wind speed (momentary gust wind speed/total wind at 35m, NOT 10m...) This possibility is in addition to; the elevated DA and the vertical windshear characteristic to the airport environment at the time..

Last edited by Datum; 31st Aug 2016 at 04:25.
Datum is offline