At 90 deg remaining to turn the ADF needle should be about 10 deg ahead the abeam position ie 80 deg L or R of the nose. If it's less than that you need to stop the turn & wait for the needle to fall to the '10 ahead' position before continuing the turn inbound. If more than 80 deg then you need to increase turn rate &/or expect to re-intercept from the other side.
At 45 deg remaining to turn the needle should be about 5 deg ahead the 45 deg marks ie about 40 deg L or R of the nose. Same deal about what to do if the needle isn't in position.
If using a VOR then the equivalent to the '10 deg ahead' position is when the CDI becomes alive. '5 deg ahead' equivalent is when the CDI is at half scale deflection.
Some aircraft have a fair bit of needle error during bank. You will have to adjust the ADF needle's expected positions to compensate.
Last edited by Tinstaafl; 26th Oct 2009 at 02:52.