Too high Pivotal altitude Too low Figure 6-13.  Effect of different altitudes on pivotal altitude. pilot should begin the turn by lowering the upwind wing  to the point where the visual reference line aligns with the  pylon. The reference line should appear to pivot on the pylon.  As the airplane heads upwind, the groundspeed decreases,  which lowers the pivotal altitude. As a result, the pilot must  descend to hold the visual reference line on the pylon. As  the turn progresses on the upwind side of the pylon, the wind  becomes more of a crosswind. Since this maneuver does not  require the turn to be completed at a constant radius, the pilot  does not need to apply drift correction to complete the turn. so that the airplane arrives at a point downwind from the  second pylon that is equal in distance from the pylon as the  corresponding point was from the first pylon at the beginning  of the maneuver. At this point, the pilot should begin a turn in the opposite  direction by lowering the upwind wing to the point where the  visual reference line aligns with the pylon. The pilot should  then continue the turn the same way the corresponding turn was  performed around the first pylon but in the opposite direction. If the visual reference line appears to move ahead of the  pylon, the pilot should increase altitude. If the visual reference  line appears to move behind the pylon, the pilot should  decrease altitude. Deflecting the rudder to yaw the airplane  and force the wing and reference line forward or backward to  the pylon places the airplane in uncoordinated flight, at low  altitude, with steep bank angles and must not be attempted. As the airplane turns toward a downwind heading, the pilot  should rollout from the turn to allow the airplane to proceed  diagonally to a point tangent on the downwind side of the  second pylon. The pilot should complete the rollout with  the proper wind correction angle to correct for wind drift,  With prompt correction, and a very fine control pressures,  it is possible to hold the visual reference line directly on the  pylon even in strong winds. The pilot may make corrections  for temporary variations, such as those caused by gusts  or inattention by reducing the bank angle slightly to fly  relatively straight to bring forward a lagging visual reference  line or by increasing the bank angle temporarily to turn back  a visual reference line that has moved ahead. With practice,  these corrections may become slight enough to be barely  noticeable. It is important to understand that variations in  pylon position are according to the apparent movement of the  visual reference line. Attempting to correct pivotal altitude  by the use of the altimeter is ineffective. 6-17