Jump to content

Archived

This topic is now archived and is closed to further replies.

744pilot

QFE

Recommended Posts

Hi,Just made another terrific flight from Hong Kong to Almaty with the WOW. But in Kazachstan they prefer QFE over QNH.And as far as I know QFE (Altitude above Station) should read 0 at the THR for the RWY.In the MD11 it's the same as the QNH. Is this FSX related or did I just discover a bug? Thanks in adv,

Share this post


Link to post

HeyQNH and QFE are two different things and you have to calculate the QFE yourself and set the QNH to the calculated QFE for the altimeter to read 0 on touchdown. This is done by keeping in mind that 1Hpa = 27ft. So if the airport elevation is 400ft AMSL, and the QNH is 1018, then you say 400ft divided by 27ft = 14.8hpa. Now because 1018 is higher than the standard 1013Hpa, you have to Minues the 14.8Hpa from the 1018 which would equal 1003.2. So setting the QNH in MD11 to 1003 SHOULD give you an altimeter reading of 0ft when you landEDIT: or did i mis-read your post. Are you saying that the elevation is higher than 0ft and when you set the QNH to the pressure at the airport it reads 0? If thats the case it could be weather related, perhaps the METAR report at the station is reporting the QFE and FSX sets it as such


Bryan Richards

 

"People depend so much on automation that they forget how to get the automation to work." B.W.

Share this post


Link to post

Ramon,The QFE value is not set automatically. The QNH/QFE switch just toggles the PFD display. You have to set the correct QFE yourself by turning the baro knob until the displayed altitude at the PFD altitude tape becomes 0. Normally you would get the correct setting from the ATC or ATIS.


Michael Frantzeskakis
Precision Manuals Development Group
http://www.precisionmanuals.com


devteam.jpg

Share this post


Link to post

Oh, now I get it. It works fine now...It's a nice feature though ;) Just wasn't used to it.Thanks for the quick response guys.

Share this post


Link to post
  • 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%
    $540.00 of $25,000.00 Donate Now
×
×
  • Create New...