Hi!
The CRP manual tells you to use wind UP for questions on heading and wind DOWN for questions on track. So far that has worked 100% for me, with questions from bristol/atponline.gs. It makes sense as well, if the CAA use CRP as reference.
Blueskyrich's problem doesn't match though. Using wind-up gives the correct speeds, but considering the question gives headings, and not tracks, wind-down should be used according to CRP manual.
I'll definately be going with UP for headings and DOWN for tracks on my exam next week, but will try both if I don't get a good match (unless the alternatives give it away).
Anyway, here's a quick walkthrough of the two methods
Find heading/gs: Mark wind upwards, set track, set TAS on wind mark, read GS in center, read WCA.
Find track/gs: Mark wind downwards, set heading, set TAS in center, read GS at wind mark, read drift angle.
And by the way, either method gives the same results on both E6B and CRP models. You just need to look away from the detailed wind-up description on a E6B when doing questions on track.
I would never do the exams with an E6B though, as it lacks the high speed side, the mach conversions and more.
Edit: Just tried with some of the "Find w/v" questions on atponline.gs as well (where you have both hdg and track). Answers are a little off with wind up, and match perfectly with wind down.
Last edited by frodegh; 2nd July 2007 at 20:05.