On Jan 15, 11:20*am, terry wrote:

*For example, Dallas if the presssure
altitude as 5000 ft and temp was 10 dec C, that would be a density
altitude of *5520 ft.

DOH not a good example that should have been 5000 ft and 9.3 deg C to
give 5520 ft

Now I could get the same density altitude of 5520 ft if I had a
pressure altitude of * 3000 *feet and a temperature of 30 C . Do we
agree on that? *I I would then expect that the takeoff distance
required for either of these 2 scenarios would be the same. *The point
of the post being that this not the case with the data set in the
table.

I could have explained it a lot better with graphs but I dont think
you can do that on usenet.

Terry