Page 867 - PPL-engelsk 2025

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To calculate WCA and GS for our flight, you must (on CRP1W):

1. Set TT 254° up under the index

by turning the course dial

2. Turn the L-wind arm in the

direction the wind is coming

from: 190°

3. The 2 is wind speed 20 kt

4. Slide the slider so that the 2

intersects the TAS LINE by 100

KT

5. Read: WCA ÷ 10 degrees GS 89 Knots (Kt)

The attentive reader will notice that we also have the wind triangle here. Try

solving the other two legs of our flight using the computer.

On CRP1 you do this:

1) Set 254 under Index

2) Set TAS 100 (push the slider until

the grommet is above 100)

3) Mark wind speed 20 KT on the

center line (i.e. at 120 since the

wind is from the left)

4) Turn the dial so that wind speed 190 is below Index

5) Push the slider so the dot with wind

speed 20 intersects the TAS line 100

o
6) Read WCA -10 (minus since it comes

from the left)

Read GS in the grommet to 90 KT

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 867