Pressure ALT
Fly Conventional Gear
Joined: May 2007
Posts: 1,600
Likes: 0
From: Winchester
What is the point of Pressure Altitude?
I also find it odd that so few planes seem to come with one of those graphical diagrams which take in weight, temperature, wind, runway slope, runway-end obstacle height, and instantly you can get the required runway distance.
Joined: Jun 2003
Posts: 13,787
Likes: 0
From: EuroGA.org
Yes, CT, you are quite right.
However, looking at some sample cases, the normal range of QNH (say 980-1030) seems to make only a small difference to takeoff performance. Temperature makes more of a difference.
Of course, loading and surface types make by far the biggest difference and this is where most accidents (where this kind of stuff is a factor) have gone wrong.
However, looking at some sample cases, the normal range of QNH (say 980-1030) seems to make only a small difference to takeoff performance. Temperature makes more of a difference.
Of course, loading and surface types make by far the biggest difference and this is where most accidents (where this kind of stuff is a factor) have gone wrong.
