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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. |
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. |
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