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Old 8th Jul 2012, 23:02
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Transsonic2000
 
Join Date: Jan 2006
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Hi there,
I'd need some feedback regarding the following question - I believe that the answer provided is incorrect.

A Boeing 747-400 has a wing span of 64.4 m. When considering relevant obstacles for the take-off flight path what is the semi-width of the zone at a distance of 1500 m from the TODA?
QDB says that the correct answer is 277.5 m but I come up with 279.7 m applying the following formula:

Domain 1/2 width = 60m + 1/2 wing span + 0.125 D
Domain 1/2 width = 60 + 32.2m + (0.125 x 1500m)
Domain 1/2 width = 279.7m

Thanks
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