9.23. Crossunder (Figure 9.19).

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9.23.1. Objective. A crossunder is used to reposition number 2 from one side of the formation to the other.

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9.23.2. Description. A crossunder may be accomplished with the formation in fingertip or route formation. Number 2 maintains nose-tail separation while crossing under. Number 1 directs a crossunder with a radio call or visual signal. The visual signal is a rapid, shallow wing dip in the desired direction of the crossunder. The size of the wing dip should be proportional to number 2’s spacing. Anticipate each power change and make small changes in pitch and bank.

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9.23.3. Procedure. To accomplish a crossunder, reduce power as required to establish a small forward LOS rate. Move back and down below number 1’s POM to establish nose-tail clearance, and then add power slightly to stop rearward movement. If in a climb, keep the power reduction small to avoid excessive rearward movement. Bank slightly toward the new side to change aircraft heading a few degrees (create small HCA). Roll wings level and fly across and behind number 1. Add power as required to maintain proper nose-tail separation and prevent falling further aft. Number 2’s canopy bow should appear to be superimposed on the trailing edge of number 1’s elevator. Reestablish number 1’s heading when in the desired position on the new side. The wing tiedown loop on the exhaust stack should provide sufficient lateral separation. Add power to move forward and up into position. Reduce power to stabilize in position on the opposite side of number 1 from which the crossunder was started.

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