Originally Posted by
nightowl727
I expect the CAA/JAR rules are similar.
No, they're not, which is why you're seeing some divergence of answers. PANS-OPS says:
1.3.3 Allowance for known wind
All procedures depict tracks. Pilots should attempt to maintain the hack by making allowance for known wind by applying corrections both to heading and timing. This should be done during entry and while flying in the holding pattern.
1.3.4 Start of outbound timing
Outbound timing begins over or abeam the fix, whichever occurs later. If the abeam position cannot be determined, start timing when the turn to outbound is completed.
1.5.2 Corrections for wind effect
Due allowance should be made in both beading and timing to compensate for the effects of wind to ensure the inbound track is regained before passing the holding fix inbound. In making these corrections, full use should be made of the indications available from the navaid and estimated or known wind.
Going for a 1-minute inbound leg is a North American thing. It requires a 1.5 sec/knot correction at 120 KTAS. One could argue that PANS-OPS allows an outbound distance equivalent to 1 minute in still air (0.5 sec/knot at 120) or an extended outbound to make the start of the inbound leg at the equivalent still-air position (1.0 sec/knot at 120).
(As a simplistic explanation, 0.5 sec/knot at 120 compensates for the wind on a 1 minute leg, 1.0 sec/knot at 120 compensates for the wind on a 1 minute leg + a 1 minute turn, 1.5 sec/knot at 120 compensates for the wind on a 1 minute leg + a 1 minute turn + the 1 min inbound leg).
Just noticed that keithl has posted similarly about procedures being different. For a 3 minute total from abeam, it's 0.75 sec/knot.