Aviation news analysis
50 SKY SHADES - World aviation news

Effect of Humidity and Wind

Date: 07 Nov 2015 03:01
Author:

–Umidity

Because of evaporation, the atmosphere always contains moisture in the form of water vapor. This water vapor replaces molecules of dry air, and, because water vapor weights less than dry air, any given volume of moist air weights less-is less dense- than an equal volume of dry air.

–Effects of Wind

Surface winds during takeoffs and landings have, in a sense, an opposite airplane performance to winds aloft during flight. During takeoff, a headwind shortens the takeoff run and increases the angle of climb. This increases performance and, if the density altitude is high, helps to compensate for lost performance. A headwind during flight, however, has the opposite effect on performance, in that it decreases groundspeed and consequently increases the total amount of fuel consumed for that flight.

During takeoff, a tailwind increases the takeoff run and decreases the angle of climb. Because of the risks involved, a pilot should carefully consider this decrease in performance before attempting a downwind takeoff; the result, otherwise could be disastrous. During flight, though a tailwind is a great plus, as it increases groundspeed, conserves fuel, and saves time. During landing, a headwind steepens the approach angle and shortens the landing roll, while a tailwind decreases the approach angle and increases the landing roll.

In light of the dangers, downwind operations should be carefully evaluated before being attempted.

(to be continued)



Loading comments for Effect of Humidity and Wind...

Recommended

Happy New Year!

It is time to say goodbye to 2016. I am truly grateful for everything, good and bad, sad and joyful ! We’ve moved ahead despite many things and thanks to much more things ! Many dreams came true, m...

NEW PARTNERSHIP TAKES OFF

Capital Handling is happy to announce the conclusion of a partnership with STEERING PARTNERS to promote CH facilities at Riga Airport. Vladimir Velebit, co-founder at Steering Partners: "Steering P...

20th European Aerobatic Championship 2016 Unlimited

Hello my friends! Salut mes amis! Hola mis amigos! Hallo meine Freunde!

FLYING ECHO PHOTO MAGAZINE APRIL 2018

https://www.manuelbelleli.com/2018/03/25/flying-echo-april-2018/

9th Annual Civil Aircraft Industry International Forum

9th Annual Civil Aircraft Industry International Forum Held in conjunction with 6th Annual China Aeronautical Materials and Process Summit September 12th - 13th, 2018Chengdu, China Host...

Airplane performance

Many accidents are occurred because pilots failed to understand the effects that varying conditions can have on aircraft performance.In addition to those of W&B, others, such as density altitude, humi...