Volume II. Flying Qualities Phase, Chapter 16. Chapter 16: Reprint of NASA TN D-5153, The Use of Pilot Rating in the Evaluation of Aircraft Handling Qualities


Book Description

Pilot rating scales and their use in assessing aircraft handling qualities are reviewed historically, and objections that have been raised to limitations of earlier scales are considered in the development of a revised scale. Terminology used in the evaluation of handling qualities is reviewed and new definitions are proposed to improve communication and international understanding. O f particular significance is the new definition of handling qualities, which emphasizes the importance of factors that influence the selection of a rating other than stability and control characteristics. The experimental use of pilot rating is discussed in detail, with special attention devoted to (l) clarifying the difference between mission and task, (2) identifying what the rating applies to, (3) considering the pilot's assessment criteria, and (4) defining the simulation situation. The important elements of the report are then summarized in a suggested Briefing Guide, designed for guidance in planning and executing handling qualities experiments.







Volume II. Flying Qualities Flight Testing Phase. Chapter 10: High Angle of Attack


Book Description

From the designer to the pilot, everyone associated with the flying qualities of high performance military aircraft, particularly the fighter or attack variety, is or should be aware of the importance of the high angle of attack flight regime. It is here that the aircraft will spend a significant amount of its time when performing the mission for which it was designed. It is here that the aircraft must display its most outstanding performance. It is also here that the aircraft, when pushed beyond its limits of controllability, can seemingly defy all laws of physics and principles of flight with which its surprised and often bewildered pilot is acquainted. The frequency of inadvertent loss of control at high angle of attack is such that many combat aircraft pilots are becoming firmly convinced that all pilots may be divided into two categories: those who have departed controlled flight, and those who will. Most thoroughly convinced are those pilots who fall into the former category. The unfortunate fact concerning departure from controlled flight at high angle of attack is that many aircraft and pilots are lost each year due to failure to recover from the out-of-control flight condition. The circumstances surrounding the losses are varied. Departures from controlled flight may occur unintentionally during high-g maneuvers or intentionally during a nose-high deceleration to zero airspeed in an attempt to gain an advantage over an opponent in combat maneuvering; the aircraft may spin and the gyration be identified too late for recovery or a steep spiral may be mistakenly identified as a spin, causing recovery controls to be misapplied. Whatever the circumstances, departures from controlled flight result all too often in catastrophe. For this reason, test pilots in particular must be familiar with every facet of the high angle-of-attack flight regime.




Volume II. Flying Qualities Phase. Chapter 3: Differential Equations


Book Description

This chapter reviews the mathematical tools and techniques required to solve differential equations. Study of these operations is a prerequisite for courses in aircraft flying qualities and linear control systems taught at the USAF Test Pilot School. Only analysis and solution techniques which have direct application for work at the School will be covered.




Volume II. Flying Qualities Flight Test. Chapter 11: Engine-Out Theory


Book Description

This chapter examines the problems associated with an engine failure and how engine out flight testing is accomplished. The discussion will begin with performance issues, how engine loss affects the takeoff and initial climb segments. Next, the equations of motion are introduced, modified for an engine failure. They are used to show how minimum control speeds are determined by design. Finally, flight test techniques are introduced for the evaluation of engine out flying characteristics of multiengined aircraft.







Volume II. Flying Qualities Phase. Chapter 2: Vectors and Matrices


Book Description

This chapter studies the algebra and calculus of vectors and matrices, as specifically applied to the USAF Test Pilot School curriculum. The course is a prerequisite for courses in Equations of Notion, Dynamics, Linear Control Systems, Flight Control Systems, and Inertial Navigation Systems. The course deals only with applied mathematics; therefore, the theoretical scope of the subject is limited.




Volume II. Flying Qualities Phase. Chapter 6: Maneuvering Flight


Book Description

The method used to analyze maneuvering flight will be to determine a stick-fixed maneuver point (Hm) and stick-free maneuver point (H'm). These are analogous to their counterparts in static stability, the stick-fixed and stick-free neutral points. The maneuver points will also be derived in terms of the neutral points, and their relationship to cg location will be shown.




A Flight Determination of the Tolerable Range of Effective Dihedral on a Conventional Fighter Airplane


Book Description

A conventional fighter airplane was equipped with a special device for varying the effective dihedral in flight. A survey of pilot's opinions was made to determine which values of effective dihedral were intolerable. The relation between the findings and the present Air Force-Navy stability and control specifications is discussed.




Aeronautical Engineer's Data Book


Book Description

Aeronautical Engineer's Data Bookis an essential handy guide containing useful up to date information regularly needed by the student or practising engineer. Covering all aspects of aircraft, both fixed wing and rotary craft, this pocket book provides quick access to useful aeronautical engineering data and sources of information for further in-depth information. - Quick reference to essential data - Most up to date information available