Given:
Distance from departure to destination: 875 NM
True track: 240°
W/V: 060/50
TAS: 500 kt
What is the distance and time of the PET from the departure point?
Wind is completely tail wind in the way out and headwind in way home
GS Out: 550 kts
GS Home: 450 kts
Distance to PET = (GS home x Distance) / (GS out + GS home)
Distance to PET = ( 450 x 875) / (550 + 450) = 394 NM
Time to PET = Distance to PET / GS out
Time to PET = 394 / 550 = 0.71 hr = 43 minutes
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