Hi,
Where you doing the reval? The instructor will be able to tell you what to use...
edited:
take about half the crosswind for drift. You can use the formula
max drift = 60 x WIND/TAS if you want to work it out a bit more accurately, but you'll see for most light twin speeds, halving it works well.
For hold IAS of about 130kts, I was taught:
For a small hold (<4nm) use 3 times the drift outbound and 1x drift inbound (or in reality, just get on to the inbound track and hold it).
For a large hold (>4nm) use 2 times the drift outboud and 1x drift inbound.
For outbound timings:
add 1 second for every kt of headwind. subtract 1 second for every kt tailwind. For the tailwind case I'd almost be inclined to not take off much time - sure your timing will be out a bit but it will give you more time to get back onto the inbound. The holds are designed for fast jets so a 130kts twin prop is not likely to get outside the protected zone in this case!
Good luck,
Last edited by Darth_Bovine; 30th January 2013 at 08:16.