Browsing by Author "F. O'Hara"

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An analysis of the longitudinal stability and control of a single-rotor helicopter

F. O'Hara (1954)

The general theory of longitudinal stability and control for a single-rotor helicopter is presented in a form similar to that for fixed-wing aircraft. It is shown to be possible to establish for the helicopter in forward ...
The forward take-off of a helicopter

F. O'Hara (1953)

A theoretical analysis is given of the accelerated motion of a single-rotor helicopter for estimation of the forward take-off performance. The motion is considered in stages during which either the disc attitude to the ...
An investigation of the flow over a half-wing model with 60.5 degrees leading edge sweepback, at a high subsonic and supersonic speeds

F. O'Hara; J. B. Scott-Wilson (1960)
A method of performance reduction for helicopters

F. O'Hara (1947)

The equations for helicopter performance are derived in a form suitable for the development of performance reduction methods, and the equations obtained provide also a simple method of performance estimation. Formulae are ...
The performance after power failure of a helicopter with blade pitch control Parts I and II

F. O'Hara; H. A. Mather (1951)

In Part I a review is made of helicopter performance after engine failure. The transition from powered operation to autorotation is discussed and a theoretical analysis of the motion is given for a single-rotor helicopter ...

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