Jump to content

Sign in to follow this  
Guest iain williams

FMC, Approach and Wind Speed

Recommended Posts

Guest iain williams

Hi:Just a query. When landing the 737 in cross wind or head wind conditions should you enter the wind componont into the FMC so that the landing V speed and flap increment levels are altered to take the wind into account?On the FMC is this the WINF CORR +5KN line select key?In Fred Claudens's tutorial in the approach section, he mentions in his "info bit" section the following:"If we had wind conditions, we would have to correct the approach speed by (going off memory here) adding the constant wind speed and one half of the gust component, I think that is the right forumla".Does anyone know the correct formula to calculate this??Many thanks as always..............Iain (Australia)

Share this post


Link to post
Guest ekchflyer

Hi IainI really want to help- but iam not quite sure if Iam right about this but I hope so!!!more than 10 knt.vref+1/2x+the gustbelow 10 knt. vref+5Just read in in another post hope it is what you are looking for!All the bestKenn Larsen:-)

Share this post


Link to post
Guest iain williams

Hey Kenn:Thanks very much. I'm using active sky live weather quite a bit now and wind often is an issue, so I wanted to ensure the calculation was the right one.It didn't really matter until now, as wind was never really an issue using the FS9 fine weather scenario!......Thanks again.....Iain

Share this post


Link to post
Guest canyonblue737

a good system is to use half of the wind speed and all of the gust.for example: 270/17G24 would be half of 17 = 9 (rounding up) and all of the gust would be 7 (24-17=7). 9+7=16 so fly vref + 16 as your target speed and what you put into the MCP speed window. one important thing to remember is your correction should never exceed vref+20 nor be less than vref+5 no matter the wind or other issues to prevent excess speed or too little a margin.

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    2%
    $640.00 of $25,000.00 Donate Now
×
×
  • Create New...