Thursday, April 8, 2010

Nail that ILS!

I found this trick in a magazine. It is simple and can be used enroute as well. The trick is how many degrees to correct final approach Track (FAT) when windspeed is known.
Formula: Max Drift Angle = (60/KTAS) x Windspeed
Example: wind is 250/15 kts. KTAS = 120 kts
MDA=60/120*15=7,5 degrees
If wind-direction is more than 60 deg off your FAT, use 7,5 degrees
If wind-direction is 30 deg off your FAT, use half MDA, 3,25 degrees
Other wind-directions: Interpolate
So if FAT is 220, heading is 223,25 degrees. Works fine!

This comment was entered a late night from Washington to Dallas @ FL340! Cool!

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