033 - Flight Planning Monitoring CPL (A)

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Given the information below, calculate the Ground Speed for an aircraft on one leg of a cross country flight.

TAS: 110 kt
TT: 235°
W/V: 350°/23 kt

Refer to figure.
Solving from Heading (HDG) & Ground Speed (GS), knowing WV, TAS and required track.

Set wind direction to 350° under the "TRUE HEADING" index at the top.
Set the center point on the True Airspeed (TAS) of 110 kt.
Mark the wind velocity 23 kt down from the centre point.
Initially, set the True Track to 235° under the "TRUE HEADING" index.
Note that this heading would result in 10°L drift and a track of 225°.
Reduce the heading value under the index until the heading minus the drift gives a track of 235°. This occurs at a heading of 245° with 11°L drift.
The groundspeed for this track is approximately 118 kt.

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