Stall turn

Aresti Catalog's notation of stall turn. The aircraft begins at the dot, and pulls into a vertical climb. The small angled line at the top indicates a stall turn (without indicating the orientation after the turn). The plane then descends, pulls into horizontal flight, and ends at the small vertical line.

The hammerhead turn, stall turn, or Fieseler is an aerobatics turn-around maneuver.

Description

Enter at full power and maximum airspeed. Pull the aircraft up through a quarter loop into a vertical climb. The speed will decay but before upward motion stops firmly apply full rudder to yaw the aircraft through a cartwheel of 180° until the nose is straight down. Dive vertically to the same altitude as the maneuver started, then pull out, exiting in the opposite direction.^[1]

Flying technique

The timing of applying full rudder is critical. If instigated too soon it results in a wingover. If instigated too late the plane will fall into a sideslip or else enter a tailslide which most aircraft are restricted from doing.

Performing the pivot requires sufficient airflow over the rudder. In planes with a suitably-positioned propeller, the propwash may provide this. Otherwise, rudder must be applied sooner while the plane still has forward airspeed.^[2]

This maneuver demands there be no rolling at all but when airflow is minimal ailerons become ineffective. So as soon as the yaw is established reduce throttle to prevent the aircraft from rolling due to engine torque. Do not open the throttle again until the dive when sufficient airspeed has been gained for aileron control.^[1] Reduced throttle will also prevent gyroscopic precession from pitching the nose up.

Another problem in this maneuver is that higher lift from the faster moving outside wing will roll the airplane to the left. Most pilots find holding forward right stick necessary throughout the pivot.^[2]

SAR reversal

This maneuver has also been called the search and rescue reversal. SAR helicopters fly this when hunting survivors or submarines for it brings the aircraft directly back along the same course to verify the target. The maneuver doesn't require visual meteorological conditions (VMC) if the pilot is proficient at maintaining altitude by keeping the lateral acceleration ball centered, for any uncoordinated lateral acceleration will induce spatial disorientation.

References

1 2 Williams, Neil (2003) [First published 1975]. Aerobatics. Marlborough, UK: Crowood Press. ISBN 9780950454306.
1 2 O'Dell, Bob (1980). Aerobatics Today. New York: St Martin's Press. ISBN 0312007590.

Aerobatics

Aircraft	List of aerobatic aircraft

Competitions	European Gliding Championships FAI European Aerobatic Championships FAI World Aerobatic Championships FAI World Grand Prix Red Bull Air Race World Championship World Gliding Championships

Maneuvers	Loop (Inside & Outside) Aileron roll Barrel roll Cuban Eight Falling leaf Hesitation roll Immelmann turn Kulbit Lomcevak Pugachev's Cobra Slip Spin Split S Stall Turn/Hammerhead Tailslide The Scissors Whifferdill turn Zurabatic Cartwheel

Organizations	British Aerobatic Association Fédération Aéronautique Internationale (Aresti Catalog) International Aerobatic Club International Miniature Aerobatic Club

Pilots	Cecilia R. Aragon Hannes Arch Princess Basmah Bani Ahmad Lincoln J. Beachey Péter Besenyei Ladislav Bezák Marta Bohn-Meyer Paul Bonhomme Pip Borrman Kirby Chambliss Julie Clark Marion Cole Vicki Cruse Mario de Bernardi Glen Dell Matthias Dolderer Wilhelm Düerkop Walter Extra Markus Feyerabend Gerhard Fieseler Jozef Gabris Michael Goulian Matt Hall Wayne Handley Ray Hanna Charlie Hillard Bob Hoover Bevo Howard Petr Jirmus Steve Jones Jurgis Kairys Georgij Kaminski Svetlana Kapanina Sándor Katona Charlie Kulp Anatoly Kvochur Nigel Lamb Jim LeRoy François Le Vot Leo Loudenslager Nancy Lynn Alejandro Maclean Pete McLeod Jerzy Makula Stanisław Makula Mikhail Mamistov Mike Mangold Scott Manning Catherine Maunoury Neil Williams Pyotr Nesterov Alexandr Panfierov Ivy May Pearce Adolphe Pégoud František Peřina Tom Poberezny Maciej Pospieszyński Sergey Rakhmanin Amelia Reid Olaf Schmidt Art Scholl Klaus Schrodt Betty Skelton Erde Skip Stewart Martin Šonka Gene Soucy Chris Sperou Victor Tchmal Reinhold Tiling Ferenc Tóth Sean D. Tucker Nick Turvey Ernst Udet Gabor Varga Juan Velarde Frank Versteegh Patty Wagstaff Kermit Weeks Walter Wolfrum Janusz Żurakowski

Other	3D Radio control Virtual Festival of Aerobatic Teams

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