I've read about ADF dip and what causes it, but I'd like to know how one can make a correction for it. I'm flying a PA44 for the instrument rating ... an NDB approach using an RMI requires an outbound leg of 239 degrees, and then a right turn to 071 inbound to the aid. In the turn I monitor the RMI needle and all looks good for a perfect intercept, but then after rolling out to wings level, the blasted needle moves!! Grrrrr!!
So my question is, is there a formula, rule of thumb, old wives tales etc, that one can use to estimate when to rollout so I minimize the ADF dip error? My instructor doesn't seem to think so, and suggested I rollout to wings level at 90 degrees in to the turn to reasses my bearing to the station and then again at 45 degrees and so on. But I'd rather do a smooth turn on to the inbound track just like how the big boys/girls do it in the airlines. Any tips?