PPRuNe Forums - View Single Post - Instrument Rating Drift Allowances???
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Old 12th Jun 2006, 06:24
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Capt Claret

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novicef

He also said there was a rule for the 80degree procedure turn whereby you held that heading for so many seconds but he could not recall how long.
From Jeppesen/Terminal/AU-20/3.9.2

a. Procedure Turn (45°/180°) Consisting of a specified track & timing from the facility or fix, a 45° turn away from the outbound track for 1 minute from the start of the turn for categories A and B aircraft (1 minute 15 seconds for categories C, D and E aircraft), ....
As for drift in a holding pattern, I can count on the fingers of one hand the number of times I've had to hold for real. Finding that I rarely knew the actual wind to apply a rule of thumb I'd apply what seemed reasonable, and when turning inbound assess how the outbound drift went.

Whilst inbound, given one is tracking a bearing or preferably a radial, the drift is easy to determine, and then apply on subsequent patterns.

I found that this frees brain space for other considerations.
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