Aircraft Flight: A description of the physical principles of by D.R. Philpott, R.H. Barnard PDF

By D.R. Philpott, R.H. Barnard

ISBN-10: 0273730983

ISBN-13: 9780273730989

Airplane Flight presents exact actual, instead of mathematical, descriptions of the foundations of plane flight. This renowned textual content provides mechanical engineering and aeronautical engineering scholars an invaluable advent to the topic. The fourth variation has been up-to-date to incorporate very important contemporary advancements equivalent to unmanned air cars and the low orbit space-plane

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Additional resources for Aircraft Flight: A description of the physical principles of aircraft flight

Example text

A teetering rotor is used on the autogyro shown in Fig. 31. Some more recent helicopter designs do not use hinged blades, but rely on carefully controlled flexure of the mounting points: an arrangement that is often misleadingly referred to as a rigid rotor. 26 shows a ‘rigid rotor’ head mechanism. Its relative simplicity and compactness may be contrasted with the great complexity of the conventionally-hinged double unit of the Kamov shown in Fig. 25. The rotor head contains not only the hinges or flexures but must also carry the mechanism for the cyclic and collective pitch control of the blades.

As they ‘autorotate’, they generate lift, like the blades of a helicopter. The autogyro requires a certain amount of forward speed in order to maintain sufficient autorotation to lift the aircraft. Thus, although it has the advantage of being able to fly very slowly and make a short vertical final descent, it can not hover or take off vertically. Although mainly of historical interest, there has been some renewed interest in the autogyro for recreational flying, as illustrated by the example shown in Fig.

This generates a horizontal thrust force component, as illustrated, and the helicopter is thus propelled forwards. The flapping hinges are normally offset from the centre of the hub axis, and as the axis of blade rotation is inclined relative to the shaft axis, the centripetal forces produce moments which tend to tilt the rotor axis (and hence the whole aircraft) nose-down. By suitably adjusting the cyclic pitch control, the horizontal propulsion force can be arranged to occur in any desired direction, not just forwards, and it is thus possible to fly a helicopter sideways or backwards.

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Aircraft Flight: A description of the physical principles of aircraft flight by D.R. Philpott, R.H. Barnard

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