Who's Online

We have 1539 guests online

Live Traffic Feed

Life in the Skies

'A Local Bestseller!'

What Tony says
(See here)
and Book Launch video here
 
What others say

Les Posen
(See
here)

Yvonne Lee
(See
here)

Louisa Lim & Allan Koay
(See
here)

Aireen Omar, Asran & Bo Lingam
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

Latest Comment

What are the eyesigh
Captain, I am in class 11 in India and want to bec

What are the eyesigh
PLEASE stop asking about your eyes!!! Read the art

Vomiting on long hau
I have traveled a lot (almost 2 million miles) the

Can you become an ai
Hi captain , I had an accident 15 yrs ago and ha

Does a jet aircraft
Reading through the comments was both entertaining

Does a jet aircraft
So many nonsense here... Earth isn't flat. Period.

What are the cruisin
"how in the hell can you reach JFK if you leave fr

What are the eyesigh
tjsoihsdojfsioufs f post

What are the procedu
Hello Sir, I am currently B737NG Cpt.TRI /TRE hol

Could an A320 pilot
I plan to do ATR 72 -600 type rating , for that be

Paperback Version

 For Local Availability - Check Here
 
Home > Flying the Plane > Why V speeds vary with altitude, temperatures and air pressures?
Why V speeds vary with altitude, temperatures and air pressures?
Flying - Flying the Plane
Tuesday, 11 December 2007 20:40

Hi Capt Lim,

I have a question. Why the Vee speeds during take off vary depending on altitude, temperature and air pressure?

Regards,

Patricio

Hi Patricio,

When you mentioned the Vee speeds, I believe you are referring to the V1, VR and V2 speeds. I have defined these speeds in one of my previous FAQs relating to engine failure during take off.

Well, the V speeds not only vary with altitude, temperature and air pressure but also the airplane's weight and flaps settings too. In addition, the V1 speed is also affected by the runway slope and wind conditions. Therefore, adjustments have to be made on the V1 based on these additional factors.

At higher altitude, the air is less dense. Hence you have to make adjustments by adding or subtracting the speeds as you take off from higher ground. Similarly, changes in temperature and air pressure affect the density of air too.

So, if your aircraft weight is light and you require a higher flap settings for take off, your V speeds will also be considerably lower.

Trackback(0)

TrackBack URI for this entry

Comments (0)

Subscribe to this comment's feed

Write comment

smaller | bigger

busy
 

Paperback Version

 For Local Availability - Check Here

Recommended By..


LIFE IN THE SKIES

'A Local Bestseller!'

Recommended by

Patrick Smith
Boston USA
(See
here)

Capt Meryl Getline
ex-United Airlines USA
(See
here)

Capt Doug Morris
Canadian Airlines
(See
here)

Capt  Robert J Boser
ex-United Airlines USA
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

View Book Launch video here

Follow me

@CaptKHLim

Like What You Read?


If you like what you read, more stories are found in my book LIFE IN THE SKIES (Preview here) and you can purchase a copy here. To check for any latest updates or postings, you can follow my Twitter at @CaptKHLim or Facebook here

MH 370 Interviews

Click here to View

10 Most Popular Posts



Disclaimer | Privacy
2004 - 2011 © AskCaptainLim.com | Site Concept by eQuilec.com