Download or read book Stability Control Augmentation System Evaluation written by Marvin Easter and published by . This book was released on 1966 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was made to evaluate competency of pilots trained in aircraft having a stability augmentation system. This is to determine the necessity of issuing restricted certificates to private pilots if they are unable to pass the private flight check by manual operation of controls. This project was to train five students to required flight performance for a private pilot certificate in a Cherokee-140 equipped with the Mitchell AK-153 Stability Augmentation System. When the students reached private pilot proficiency, they were given three flight checks. The first with the system on, the second with it off, and the third in a different aircraft without the stability system. All students passed the checks without difficulty. The results of the project indicate that all students reached private pilot proficiency in an average time. The stability system had no particular effect on the students' control of the aircraft with or without visual references. Therefore, it would seem unnecessary to issue restricted pilot certificates. (Author).
Download or read book Control stability Augmentation System Evaluation written by Warren G. Crook and published by . This book was released on 1966 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment was performed to investigate the proficiencies of student pilots trained to the required flight performance for a private pilot's certificate in airplanes incorporating a stability augmentation system. Two selected flight schools trained five subjects each. Upon reaching the required proficiency, each student was given three separate flight checks with and without the use of the stability systems and an additional check in a same class airplane not having a stability system. Results indicated pilot competence was not effected one way or another by training with such a system. All students met the required performance standards and were issued unlimited private pilots certificates. (Author).
Download or read book Stability and Control Evaluation of an F 4C Aircraft with a High gain Adaptive Control Augmentation System written by Richard R. Rickard and published by . This book was released on 1971 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Test Evaluation of the Three Axis Mechanical Stability Augmentation System written by George W. Fosdick and published by . This book was released on 1970 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented of flight tests conducted to evaluate a three-axis mechanical stability augmentation system (MSAS), known as 'Dynagyro', on a UH-1 helicopter. The purpose of a stability augmentation system is to augment the stability and control characteristics of unstable or weakly stable aircraft so as to provide satisfactory flying qualities. The tests encompassed 9-1/2 flight hours and approximately 3 hours of ground and hangar testing. The MSAS included an entirely new concept: vortex valve fluidic servoactuators. The magnitude of the installation and conversion procedure for installing the MSAS, was relatively small. The MSAS, as tested, did not perform as well in the helicopter as it did in the laboratory or as well as theory indicated it should. (Author).
Download or read book Flight Evaluation of a Stability Augmentation System for Light Airplanes written by Franklin F. Eckhart and published by . This book was released on 1966 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a flight evaluation of a Stability Augmentation System (SAS) for light airplanes are reported and discussed. Twenty-six non-instrument rated private and commercial pilots, whose distribution by rating and flight hours was typical of those who are involved in IFR disorientation accidents, and five instrument rated commercial pilots were flown. Quantitative measures of the bank angle, airspeed, altitude and heading were recorded during a series of planned VFR and IFR tasks with the SAS ON and OFF. Qualitative data were obtained from the subject pilots by questionnaire and the recorded observations of the safety pilot. A statistical analysis was made of the differences in pilot performance during system ON and system OFF operation. It was shown that the stabilizing effects of SAS, although not sufficient in itself to prevent this type of accident, significantly improved the non-instrument rated pilot's ability to maintain control of the airplane during an inadvertent encounter with IFR conditions. (Author).
Download or read book A Linear and Non linear Evaluation of the Bell AH 1G Huey Cobra Stability and Control Augmentation System written by Pieter Gerrit De Waard and published by . This book was released on 1992 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Airworthiness Evaluation of the OH 58C with 3 Axis Stability Control Augmentation System and Improved Tail Rotor System written by M. L. Hanks and published by . This book was released on 1983 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This preliminary airworthiness evaluation was conducted on an OH-58C helicopter configured with a 3-axis digital stability control augmentation system (SCAS) and an improved tail rotor. Additional testing on the standard OH-58C equipped with the 3-axis SCAS was required in response to questions which surfaced during working sessions of the Joint Special Study Group investigating 0H-58 loss of tail rotor effectiveness. Testing was accomplished at Arlington, TX (elevation 630 feet), Leadville, CO (elev. 9927 feet) and Alamosa, CO (elev. 7535 feet). Test time totaled 44.2 productive flight test hours. With the improved tail rotor, adequate directional control margins were available for flight at all azimuths out to the wind limits (35 KTAS sideward and 30 KTAS rearward) of the aircraft at density altitudes up through 11,000 feet for a gross weight of 3,040 lb. The overall handling qualities of the OH-58C helicopter equipped with a 3-axis digital SCAS in either tail rotor configuration were significantly improved over the unaugmented aircraft configuration except as stated in the report. TWo handling quality deficiencies were noted.
Download or read book Development and Flight Evaluation of an Augmented Stability Active Controls Concept with a Small Tail written by and published by . This book was released on 1980 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Flight Proficiency of Student Pilots Trained in an Aircraft Equipped with an Automatic Stability control Augmentation System written by H. Miller Lanier and published by . This book was released on 1966 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Competency was evaluated at the completion of training through three separate flight checks assessing pilot proficiency of manually controlling aircraft equipped with and without a stability augmentation system. Results indicated that pilot competency was not adversely affected by training received in an aircraft equipped with such a device and even contributed to cross country proficiency by relieving pilot workloads. (Author).
Download or read book Active Control Systems review Evaluation and Projections written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Mechanics Panel. Symposium and published by . This book was released on 1985 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers considered comprehensive range of topics including: Active Control Technology applications; optimisation of systems architecture for both reliability and cost; control low design, development and test; the application of handling qualities criteria and the operational demonstration ofsystem reliability.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Vertol Stability Augmentation System and Differential Delta 3 in an H 21d written by V. KEITH. PUTNAM and published by . This book was released on 1959 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: An H-21D helicopter with the Vertol stability augmentation system (SAS) and differential-deltathree was evaluated. The differential-deltathree was found to provide acceptable longitudinal dynamic stability and allow hands-off flight (longitudinally) for periods of up to 1 minute. The longitudinal channel of the SAS also provided positive longitudinal stability and allowed hands-off flight for periods of at least 1 minute. With the SAS operating, the response to a longitudinal disturbance was (jerky) and was considered objectionable in rough air. It must be noted that the differential-delta-three was operating at all times and therefore a double correction for longitudinal disturbances was present with the SAS operating. The lateral stability provided by the SAS was considered excellent. However, the reduction in lateral control response and the nature of the response (a 1 inch step input results in a fixed bank angle and does not maintain a roll rate) with SAS operating were objectionable. The SAS did not improve directional flying qualities, and some loss of directional control response was noted in hover. (Author).
Download or read book A Piloted Simulator Investigation of Static Stability and Stability control Augmentation Effects on Helicopter Handling Qualities for Instrument Approach written by and published by . This book was released on 1980 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: A motion-base simulator was used to compare the flying qualities of three generic single-rotor helicopters during a full-attention-to-flight control task. Terminal-area VOR instrument approaches were flown with and without turbulence. The objective of this NASA/FAA study was to investigate the influence of helicopter static stability in terms of the values of cockpit control gradients as specified in the existing airworthiness criteria, and to examine the effectiveness of several types of stability control augmentation systems in improving the instrument-flight-rules capability of helicopters with reduced static stability. Two levels of static stability in the pitch, roll, and yaw axes were examined for a hingeless-rotor configuration; the variations were stable and neutral static stability in pitch and roll, and two levels of stability in yaw. For the lower level of static stability, four types of stability and control augmentation were also examined for helicopters with three rotor types: hingeless, articulated, and teetering. Pilot rating results indicate the acceptability of neutral static stability longitudinally and laterally and the need for pitch-roll attitude augmentation to achieve a satisfactory system. (Author).
Download or read book Introduction to Aircraft Flight Mechanics written by Thomas R. Yechout and published by AIAA. This book was released on 2003 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a 15-year successful approach to teaching aircraft flight mechanics at the US Air Force Academy, this text explains the concepts and derivations of equations for aircraft flight mechanics. It covers aircraft performance, static stability, aircraft dynamics stability and feedback control.
Download or read book Evaluating the Handling Qualities of Flight Control Systems Including Nonlinear Aircraft and System Dynamics written by Raymond Chao Lin and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The handling qualities evaluation of nonlinear aircraft systems is an area of concern in loss-of-control (LOC) prevention. The Get Transfer Function (GetTF) method was demonstrated for evaluating the handling qualities of flight control systems and aircraft containing nonlinearities. NASA's Generic Transport Model (GTM), a nonlinear model of a civilian jet transport aircraft, was evaluated. Using classical techniques, the stability, control, and augmentation (SCAS) systems were designed to control pitch rate, roll rate, and airspeed. Hess's structural pilot model was used to model pilot dynamics in pitch and roll-attitude tracking. The simulated task was simultaneous tracking of, both, pitch and roll attitudes. Eight cases were evaluated: 1) gain increase of pitch-attitude command signal, 2) gain increase of roll-attitude command signal, 3) gain reduction of elevator command signal, 4) backlash in elevator actuator, 5) combination 3 and 4 in elevator actuator, 6) gain reduction of aileron command signal, 7) backlash in aileron actuator, and 8) combination of 6 and 7 in aileron actuator. The GetTF method was used to estimate the transfer function approximating a linear relationship between the proprioceptive signal of the pilot model and the command input. The transfer function was then used to predict the handling qualities ratings (HQR) and pilot-induced oscillation ratings (PIOR). The HQR is based on the Cooper-Harper rating scale. In pitch-attitude tracking, the nominal aircraft is predicted to have Level 2* HQR[subscript]pitch and 2 PIOR[subscript]pitch
Download or read book An Experimental Evaluation of the Sternberg Task as a Workload Metric for Helicopter Flight Handling Qualities FHQ Research written by and published by . This book was released on 1984 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Stability and Automatic Control written by Robert C. Nelson and published by WCB/McGraw-Hill. This book was released on 1998 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Flight Stability and Automatic Control presents an organized introduction to the useful and relevant topics necessary for a flight stability and controls course. Not only is this text presented at the appropriate mathematical level, it also features standard terminology and nomenclature, along with expanded coverage of classical control theory, autopilot designs, and modern control theory. Through the use of extensive examples, problems, and historical notes, author Robert Nelson develops a concise and vital text for aircraft flight stability and control or flight dynamics courses.
