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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 commercial pilot maneuver requiring the pilot to fly a horizontal figure eight around two ground objects, continuously adjusting altitude and bank to maintain a constant visual line of sight to the pylon.
  • The core concept is "pivotal altitude," the specific altitude for a given groundspeed where the line of sight from the cockpit to the pylon is parallel to the aircraft's lateral axis.
  • Successful execution involves maintaining a precise "sight picture" by dynamically varying pitch, bank, and power, while accounting for wind-induced groundspeed changes that necessitate continuous adjustments to altitude relative to the nominal pivotal altitude, keeping bank angles under 40 degrees.
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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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