Eights on pylons

Eights on Pylons or Pylon Eights, is a ground reference maneuver where an aircraft isflown in a figure eight pattern around two selected points on the ground (the pylons). [United States Department of Transportation, Federal Aviation Administration, FAA-H-8083-3A, Airplane Flying Handbook] However, Eights on Pylons differs from similar maneuvers such as Eights Along a Road, Eights Across a Road, or Eights Around Pylons in that the objective of Eights on Pylons is not to maintain a specific altitude and ground track, but rather to fly the airplane so that the pylon remains fixed in place when viewed from the cockpit along a line parallel to the lateral axis of the aircraft. This is only possible when the aircraft is flown at the pivotal altitude corresponding to the current groundspeed.If the aircraft is flying in wind, the groundspeed will vary throughout the maneuver and thusthe pivotal altitude will change also. However, the pivotal altitude varies only with the ground speed and not with the radius of turn or the angle of bank. So whether the maneuveris flown very close to the pylon with the aircraft banked 60 degrees, or farther from the pylonat 30 degrees bank, the necessary altitude is the same.

In the United States, the Federal Aviation Administration requires pilots to demonstrateEights on Pylons to obtain a Commercial Pilot License.

References

ee also

* Chandelle