PPRuNe Forums - View Single Post - Balanced/Unbalanced field length
View Single Post
Old 16th January 2006 | 19:43
  #9 (permalink)  
kenparry
20 Anniversary
 
Joined: Feb 2003
Posts: 1,078
Likes: 46
From: Brighton
Re: Balanced/Inbalanced field length

Balanced field means stop and go distances are the same, as I said in my previous post. And, again, if the mass is the max for the runway and the conditions, there is only one V1, because if you go from there (in the engine-out case)you will clear the screen by the requisite amount (just) and if you stop, you will stop at the end(just) if everything has been calculated correctly.

In the real world, balanced fields (runways) are rare - usually the Go distance is greater than the Stop distance, as most runways have some declared clearway.

You will find much more detail in textbooks for Group "A" performance - but it's a complex subject and easy to get yourself bogged down. Even with lectures from experts it's easy to get confused!

(Edited to clarify that I'm talking about the engine-out case: when all engines behave as advertised there is not a problem!)

Last edited by kenparry; 17th January 2006 at 10:08.
kenparry is offline