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Finding Pivotal Altitude

A long-time pilot-friend of ours tells a story about his first check ride for the commercial certificate. Everything was going relatively well until the examiner asked him to perform the eights on pylons maneuver. His response was something along the lines of, Yes sir, thank you, sir, and what altitude would you like, sir? The examiner ended the check ride and told him to come back after talking with his instructor about pivotal altitude. When he did, he learned that the correct pivotal altitude for a given groundspeed allows a banked line of sight from the cockpit directly parallel to the lateral axis of the aircraft to the pylon, a stationary object on the ground. Our friend went on to be one of the first pilots to fly the Airbus A300 in the U.S., for Eastern Airlines.

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Key Takeaways:

  • Eights on pylons is a demanding commercial pilot maneuver where the pilot flies a figure-eight pattern around two ground pylons, aiming to maintain a constant visual reference (sight picture) to them from the cockpit.
  • A core concept of the maneuver is "pivotal altitude," which is the specific altitude where the line of sight from the cockpit to the pylon is directly parallel to the aircraft's lateral axis, and this altitude varies with the aircraft's groundspeed.
  • Wind significantly complicates the maneuver by causing groundspeed fluctuations, requiring continuous adjustments in altitude, bank angle, and control inputs to maintain the desired sight picture and precise, coordinated flight.
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A long-time pilot-friend of ours tells a story about his first check ride for the commercial certificate. Everything was going relatively well until the examiner asked him to perform the eights on pylons maneuver. His response was something along the lines of, “Yes sir, thank you, sir, and what altitude would you like, sir?” The examiner ended the check ride and told him to come back after talking with his instructor about pivotal altitude. When he did, he learned that the correct pivotal altitude for a given groundspeed allows a banked line of sight from the cockpit directly parallel to the lateral axis of the aircraft to the pylon, a stationary object on the ground. Our friend went on to be one of the first pilots to fly the Airbus A300 in the U.S., for Eastern Airlines.

Most commercial applicants really, really don’t like the ground-reference and performance maneuvers. They know—or have a pretty good idea—that lazy eights and chandelles have little practical application in the flight levels, with steep spirals and steep turns important only when you want to be on the ground right now. And perhaps the commercial maneuver getting the least respect/greatest dislike is eights on pylons.

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