NTSB report - ILS and ATC. How does it all come together?
Steven P. McNicoll wrote:
"Mike" wrote in message
. ..
Using trigonometry, I get ~ 785ft 2.5 miles out from the touch down zone,
so your method is pretty accurate. Here's my calculation:
Assuming:
Distance = 15,000 ft
Slope: 3 degrees
Height = Distance * sin(Slope) = 785.04 ft.
A 3 degree glidepath descends 318 feet per nautical mile. 318 x 2.5 = 795.
Sorry, the original calculation was based on bad data. 15,000 feet is
not 2.5nm as stated in the original post.
1nm = 6,076ft
2.5nm = 15,190ft
Elevation = 15,190 * sin(3-degrees) = 795 ft
--
Mike
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