Figure 38

INSTRUMENT NAVIGATION

Wind solutions may sometimes be difficult, however the direction and velocity will be

helpful. The wind itself is never constant in either direction or velocity; therefore, pinpoint

accuracy is never possible.

In addition to applying the wind to your enroute navigation, it will affect turn radius. In

Figure 38, if you were proceeding west on J-36 and intended to join J-7 at Great Falls, you would

have to intercept an outbound course of 023.

If you turn to a heading of 023 on top GTF, you will probably parallel the left side of J-7

because your aircraft's turn radius would be too wide to intercept the 023R.

Figure 38

A tailwind in the previous situation would tend to increase the displacement between aircraft

position and desired track; whereas, a headwind could negate some of the effects of the turn

radius. Recall that the formula for leading turns is of 1% of ground speed.

Once you know the wind, much of the guess war}: will be taken out of course control. The

wind will affect you in flight. t may cause you to drift left or right or it may slow you down or

speed you up. By applying the procedures you have learned in this chapter you will be able to

compensate for it and you will be in control.

RADIAL TRACKING AND COURSE CONTROL 3-29