Quote:
Originally Posted by Dennis
PART B: Line of sight distance from Chris.
As a good approximation, 107.75 feet / Tan 0.28 degrees should give the distance of the airplane from Chris; that is, some 21,500 feet which is approx 6570 metres.
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that's only if the plane was perpendicular to the line-of-sight; otherwise you'll just get an upper limit, right?
looks quite close though; one might be able to get an estimate of this angle by comparing the ratio between the wingspan and the fuselage length in the photo to the real ratio, but you'll have to make other assumptions about yaw and pitch here.