Originally posted by
BEagle on the
In Flight Navigation techniques thread:
'Standard Closing Angle' is the simplest method we've found for correcting tracking errors and 'proportional correction' for timing errors. No need for lines on the chart such as those ancient 5 deg and 10 deg driftlines!! And no hard sums either. To summarise:
STANDARD CLOSING ANGLE
1. Establish your distance off track.
2. Turn towards track by a Standard Closing Angle of 60/(TAS in miles per minute) i.e. 40 deg for a 90KIAS Cherokee, 30 deg for a 120KIAS Bulldog.
3. Hold that heading for the same NUMBER of minutes as you were miles off track , i.e. 3 minutes if you were 3 miles off track.
4. Turn back onto original heading , recheck DI is synch'd and the rudder trim is correctly stopping flight with a constant yaw.
5. Adjust timing by adding 1/3 of the time spent on the Standard Closing Angle at 90KIAS or 10 sec per minute at 120KIAS.
It's easy and it works!!