How to fly a ILS/RNAV approach

Some useful rules to have fun flying ILS/RNAV approach manually even with non-perfect conditions. You’d better print them!

I saw some pilots flying  ILS/RNAV approach manually without PAPI lights or runway in sight, and seemed a bit strange to me until I found the following rules I am sharing with you. They are intended for 3 degrees glide paths.

Turn duration for ILS/LOC interception

Duration (in s)=∆ angle*3 

Where Delta Angle is the difference between your heading to intercept and the approach course the 3 is the degrees/second of the standard turning rate.


Bank Angle for the final turn

Bank ange= (speed/10)+7

Speed is intended as Indicated Air Speed, while the Bank Angle is in degrees.


Speed to maintain during APCH PATH (for liners)

200kts @ 10 miles

190kts @ 9 miles

And so on until configured at VREF+Wind correction.


Wind Correction Angle (WCA)


Were Delta wa is the difference between the wind direction and heading (final approach course). TAS is true air speed.


Vertical Speed


GS is Ground Speed

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