Scientific and Technical Aerospace Reports
Scientific and Technical Aerospace Reports

Author:

Publisher:

Published: 1982

Total Pages: 1282

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

VTOL/STOL Aircraft
VTOL/STOL Aircraft

Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development

Publisher:

Published: 1966

Total Pages: 344

ISBN-13:

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Fundamental Limitations on V/STOL Terminal Guidance Due to Aircraft Characteristics
Fundamental Limitations on V/STOL Terminal Guidance Due to Aircraft Characteristics

Author: Julian Wolkovitch

Publisher:

Published: 1971

Total Pages: 188

ISBN-13:

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A review is given of limitations on approach flight paths of V/STOL aircraft, including limits on descent angle due to maximum drag/lift ratio. A method of calculating maximum drag/lift ratio of tilt-wing and deflected slipstream aircraft is presented. Derivatives and transfer functions for the CL-84 tilt-wing and X-22A tilt-duct aircraft are presented. For the unaugmented CL-84 in steep descents the transfer function relating descent angle to thrust contains a right-half plane zero. Using optimal control theory, it is shown that this zero causes a serious degradation in the accuracy with which steep flight paths can be followed in the presence of gusts.