Influence of Forebody Geometry on Aerodynamic Characteristics and a Design Guide for Defining Departure/spin Resistant Forebody Configurations

Influence of Forebody Geometry on Aerodynamic Characteristics and a Design Guide for Defining Departure/spin Resistant Forebody Configurations PDF Author: William Bihrle (Jr)
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 300

Get Book Here

Book Description
The loss of airplanes and occupants attributable to departures from controlled flight and ensuing spins has been a problem since the earliest days of aviation. These losses have plagued both the military and general aviation communities. The phenomena responsible for such losses take on added significance because, in the past ten years, high angle-of-attack capability in the post-stall region has been shown to significantly enhance the air combat maneuvering effectiveness of fighter airplanes and, therefore, this is not a region to be avoided, but rather exploited, if possible. Fortunately, the aerodynamic characteristics that produce departures and spins have been identified within the past few years through rotary balance tests, which identify an airplane's aerodynamic characteristics in a steady rotational flow environment. It was demonstrated in the Phase I that the high angle-of-attack aerodynamic characteristics are very configuration dependent and that forebody geometry can have a significant influence on these characteristics. In the extreme case, an aircraft's undesirable aerodynamics can be completely attributable to the forebody. In this instance, autorotative yawing and rolling moments, as well as increasing nose-up pitching moments with increasing rotation rate, are realized.

Influence of Forebody Geometry on Aerodynamic Characteristics and a Design Guide for Defining Departure/spin Resistant Forebody Configurations

Influence of Forebody Geometry on Aerodynamic Characteristics and a Design Guide for Defining Departure/spin Resistant Forebody Configurations PDF Author: William Bihrle (Jr)
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 300

Get Book Here

Book Description
The loss of airplanes and occupants attributable to departures from controlled flight and ensuing spins has been a problem since the earliest days of aviation. These losses have plagued both the military and general aviation communities. The phenomena responsible for such losses take on added significance because, in the past ten years, high angle-of-attack capability in the post-stall region has been shown to significantly enhance the air combat maneuvering effectiveness of fighter airplanes and, therefore, this is not a region to be avoided, but rather exploited, if possible. Fortunately, the aerodynamic characteristics that produce departures and spins have been identified within the past few years through rotary balance tests, which identify an airplane's aerodynamic characteristics in a steady rotational flow environment. It was demonstrated in the Phase I that the high angle-of-attack aerodynamic characteristics are very configuration dependent and that forebody geometry can have a significant influence on these characteristics. In the extreme case, an aircraft's undesirable aerodynamics can be completely attributable to the forebody. In this instance, autorotative yawing and rolling moments, as well as increasing nose-up pitching moments with increasing rotation rate, are realized.

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 482

Get Book Here

Book Description


Static and Rotational Aerodynamic Data from O° to 90° Angle of Attack for a Series of Basic and Altered Forebody Shapes

Static and Rotational Aerodynamic Data from O° to 90° Angle of Attack for a Series of Basic and Altered Forebody Shapes PDF Author: William Bihrle (Jr)
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 372

Get Book Here

Book Description
The loss of airplanes and occupants attributable to departures from controlled flight and ensuing spins has been a problem since the earliest days of aviation. These losses have plagued both the military and general aviation communities. The phenomena responsible for such losses take on added significance because, in the past ten years, high angle-of-attack capability in the post-stall region has been shown to significantly enhance the air combat maneuvering effectiveness of fighter airplanes and, therefore, this is not a region to be avoided, but rather exploited, if possible. Fortunately, the aerodynamic characteristics that produce departures and spins have been identified within the past few years through rotary balance tests, which identify an airplane's aerodynamic characteristics in a steady rotational flow environment. It was demonstrated in the Phase I that the high angle-of-attack aerodynamic characteristics are very configuration dependent and that forebody geometry can have a significant influence on these characteristics. In the extreme case, an aircraft's undesirable aerodynamics can be completely attributable to the forebody. In this instance, autorotative yawing and rolling moments, as well as increasing nose-up pitching moments with increasing rotation rate, are realized.

Fourth High Alpha Conference, Volume 1

Fourth High Alpha Conference, Volume 1 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 256

Get Book Here

Book Description


Government Reports Announcements & Index

Government Reports Announcements & Index PDF Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1624

Get Book Here

Book Description


AIAA 28th Aerospace Sciences Meeting

AIAA 28th Aerospace Sciences Meeting PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 588

Get Book Here

Book Description


Aeronautical Engineering

Aeronautical Engineering PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 568

Get Book Here

Book Description
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).

Government Reports Annual Index

Government Reports Annual Index PDF Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1608

Get Book Here

Book Description


Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 261)

Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 261) PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 566

Get Book Here

Book Description


NASA SP.

NASA SP. PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 580

Get Book Here

Book Description