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June 01, 2018

Ray Prouty’s ‘Translational Lift and Transverse Flow’ for Helicopter Piloting

Not long after the helicopter pilot leaves hover to go into forward flight, he will…

April 12, 2018

Ray Prouty: Accidents Waiting to Happen

Looking back over the history of our industry, we should all be grateful that the…

March 04, 2018

From the Ray Prouty Archives: Considerations of Blade/Hub Geometry

After studying the blade geometry of the main and tail rotors of the Robinson R22…

February 23, 2018

From the Ray Prouty Archives: Helicopter-Ship Operations

Precisely operating a helicopter to and from a small piece of land on a calm,…

February 16, 2018

From the Ray Prouty Archives: Vibration Criteria

Vibration is a natural consequence of flying a helicopter rotor edgewise through the air. High…

February 09, 2018

From the Ray Prouty Archives: Stretching the Glide

An engine will seldom pick the most convenient time and place to quit. For this…

January 30, 2018

From the Ray Prouty Archives: Stability Augmentation Systems

The goal of the helicopter designer is to make his aircraft have such good inherent…

January 26, 2018

From the Ray Prouty Archives: Sideslip and Bank

A single-rotor helicopter, unlike an airplane, is not symmetrical and therein lies a possible source…

January 12, 2018

From the Ray Prouty Archives: Parameter Identification

Since about 1970, a new term has entered the vocabulary of those who analyze helicopter…

January 05, 2018

From the Ray Prouty Archives: Engine Snow Protection

Unexpected technical problems challenge almost every new engineering program. It’s the curse of the “unknown…