Helicopter Autorotation Emergency Training





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Published on Feb 8, 2009

Alabama Public Safety Trooper Aviation has provided numerous aerial assists on many film projects I've developed while with Auburn University Media Production Group. They've provided a professional and safe approach whenever their aerial assistance was needed. I will forever feel grateful for their good natured steadfast participation and absolute concern for safety and of course, their remarkable piloting skills. My government projects from historical documentaries to highway safety TV spots were also projects Alabama Trooper Aviation felt were worthwhile and challenging. Those projects always paid for any jet fuel needed and they allowed the Troopers added air time to scan the forests along the way for abandoned autos, suspicious activity, and drug activity, etc on the flight trips to and from the filming sites. I give significant credit to Alabama Public Safety's Trooper Aviation's Chief Trooper Pilots - Chris Helton, David Conrad, Jerry Hatfield and to Billy Mitchell, Trooper Aviation's Chief of Maintenance for the success of those efforts!

These short video clips reveal just one of the emergency training exercises that Trooper Aviators must perform twice a year to keep each one fully prepared should an emergency engine failure occur that can save their lives as well as anyone else aboard the craft....The footage is a result of a phone call from me to inquire if there was anything we could do to assist the Alabama Public Safety Division. I was asked if we could help document some of the helicopter auto-rotation training to provide a learning tool for new Trooper Aviation pilots and for review by the pilots to examine following their semi-annual auto-rotation emergency training re-certification.


Auto-rotations are used to perform power off landings from altitude in the event of an engine failure. A JPEG or GIF sequence of photographs showing an auto-rotation is available.
Maneuver Description
An auto-rotation is used when the engine fails, or when a tail rotor failure requires the pilot to effectively shut down the engine. It is very similar to gliding in an airplane.
The entry
To enter the auto-rotation, the pilot lowers collective all the way down, simultaneously adding right pedal. Lowering the collective maintains RPM during the entry to auto-rotation, and keeps the AOA (angle of attack) at a normal value during the glide.
Adding the right pedal is necessary because in auto-rotation there is no torque. During power-on flight, the pilot was using a lot of left pedal to counter the torque being produced by the engine. Once the helicopter is auto-rotating, the engine disengages and produces no more torque.

While the collective is being lowered, the nose of the helicopter tends to pitch down. The pilot needs to use aft cyclic to prevent this. Allowing the nose to pitch down creates two problems: it tends to reduce RPM because it decreases the amount of airflow through the rotor disk, and it tends to increase airspeed, usually far above the range you want to use while auto-rotating.

More info about helicopter auto-rotation can be found at this link: http://ezinearticles.com/?A-Successfu...

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