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Old 07-11-2005, 15:49
Chris Everrett Chris Everrett is offline
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Default Q11007

Hi,

Do you know of a page reference in the bristol ATPL course which will help me get some degree of understanding of the question below

Q11007

Given: ; value for the ellipticity of the Earth is 1/297. ; Earth''s semi-major axis, as measured at the equator, equals 6378.4 km. ; What is the semi-minor axis (km) of the earth at the axis of the Poles?


Thanks
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Old 07-11-2005, 17:08
DOUGY DOUGY is offline
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Thumbs up The Calculation

Chris


Cant remember where it is exactly, but what you have to do is divide the 6378 .4 by the 297, which gives 21.47, then subtract 21.47 from 6378.4, which gives 6356 etc, which is correct answer, its in the Gen Nav section at the front i think. Hope that helps

Dougy
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Old 07-11-2005, 19:18
Chris Everrett Chris Everrett is offline
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excellent cheers
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Old 20-09-2007, 19:46
PPLer PPLer is offline
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Perhaps you should add a more precise explanation in the database for this question?
(a-b) / a = 1 / 297 =>
(a-b) = a / 297 =>
b = a - a/297 =>
b = a(1 - 1/297)
Where (a) is the major and (b) the minor semi-axis.
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  #5  
Old 21-09-2007, 08:44
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Baz Baz is offline
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Hi,

Bristol Groundschool Notes page 2.10.

Baz
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