Download or read book Direct Lift Control for Approach and Landing written by Robert C. Lorenzetti and published by . This book was released on 1969 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct lift control (DLC) is a system which produces lift forces in the direction the pilot desires to move the airplane without significant pitching moment. DLC enhances precision longitudinal maneuvering capability by providing a change in altitude or rate of climb without a change in pitch attitude and without the initial acceleration reversal, delay in lift build-up, and excessive pitch rate overshoot associated with conventional elevator control. Operation of DLC in approach and landing is discussed. (Author).
Download or read book Flight Tests of a Direct Lift Control System During Approach and Landing written by Joseph W. Stickle and published by . This book was released on 1968 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Lift Control as a Landing Approach Aid written by L. R. Smith and published by . This book was released on 1966 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Tests of a Direct Lift Control System During Approach and Landing written by Joseph W. Stickle and published by . This book was released on 1968 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Lift Control as a Landing Approach Aid in the F 8c Airplane simulator and Flight Tests written by J. D. Etheridge and published by . This book was released on 1964 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The direct lift control system varied the droop of the aileron as a flap through a control knob on the stick. This system provided a more rapid means of changing altitude than normal longitudinal control. Direct lift control was found to be superior to normal longitudinal control for maintaining a precise glide path. (Author).
Download or read book The Control Characteristics of Aircraft Employing Direct Lift Control written by W. J. G. Pinsker and published by . This book was released on 1968 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DIRECT LIFT CONTROL FOR THE LAMS B 52 written by Gary L. Nelsen and published by . This book was released on 1968 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: A DLC (Direct Lift Control) system was designed for the LAMS B-52 test aircraft using optimization theory. Spoilers, symmetric ailerons, and elevator respond to normal longitudinal column movements, achieving incremental rates of climb up to 500 fpm from trim without pitching the aircraft. DLC reduces normal acceleration 50%, both in and out of turbulence, and improves airspeed control in precision maneuvering tasks: Approach and landing, in-flight refueling, and terrain following. The closed-loop DLC controller, consisting of fixed-gain normal acceleration, pitch angle, and pitch rate feedbacks to the three control surface servos, was demonstrated by a piloted six degree of freedom analog simulation. (Author).
Download or read book Direct Lift Control for a Variable Sweep Wing Aircraft written by Richard W. Olson and published by . This book was released on 1969 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: A DLC (Direct Lift Control) system was designed for the F-111A to investigate the handling qualities such a system would produce on a variable sweep-wing aircraft. Flaps, symmetrically operating spoilers, and the differential elevator were adapted to respond to the pilot's normal longitudinal column movements with the intent of applying lift forces in the desired direction of flight without pitching the aircraft. The closed-loop controller consists of fixed-gain normal acceleration, pitch angle, and pitch rate feedbacks to the servos. The fixed gains were selected by use of a digital optimization program based on Kalman's Linear State Regulator Theory. The controller was then tested with a piloted analog computer simulation based on the short period approximation to the longitudinal equations of motion. Approach and landing, in-flight refueling, and transsonic flight were investigated; the latter two at more than one wingsweep. It was found that with DLC more precise changes in altitude or rate of climb can be made without significant increase in normal acceleration. In addition, rates of climb or descent up to 2000 feet per minute from level trim condition can be made with less than plus or minus one-half degree change in pitch angle. Crossover was eliminated. (Author).
Download or read book Flight and Simulation Investigation of Methods for Implementing Noise abatement Landing Approaches written by and published by . This book was released on 1970 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control Characteristics of Aircraft Employing Direct lift Control written by Aeronautical Research Council and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MODEL F 4J DIRECT LIFT CONTROL written by W. B. Weber and published by . This book was released on 1967 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: An aerodynamic analysis and system design study for incorporation of Direct Lift Control (DLC) in the McDonnell F-4J airplane has been accomplished. Redesign of lift or control surfaces was not considered. Design of both a prototype and production configuration was conducted, with the prototype configuration having the capability of DLC system variation for optimization through flight testing. Design was carried out to the schematic drawing stage and word descriptions of all system changes required are included. The results of an analog computer study were utilized: to define the flap nominal position, deflection rate, and total travel required to obtain the specified incremental normal load factors (+ or - 10 or + .13/-.07); to determine DLC-Stabilator and DLC-Approach Power Compensation System (APCS) Interconnect requirements; and to investigate wave-off capabilities. It is shown that DLC incorporation in the F-4 airplane is feasible. Production incorporation may necessitate consideration of the required strength of the landing gear and backup structure, as well as wind-over-deck requirements for carrier operations, if flight evaluation of DLC shows that increased landing attitude or increased approach speed is required. (Author).
Download or read book Landing Approach Automatic Flight Control System Design Via Reduced Order Optimal Control Law written by Jerry DeVerne Pfleeger and published by . This book was released on 1973 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of optimal feedback gains is used as a basis for designing a practical longitudinal automatic flight control system for the landing approach task. A procedure is developed to give a good first-cut design. The procedure is systematic and straightforward. The procedure is used to design two control systems for a DC-8 aircraft. In one case it is assumed that pitch, rate, normal acceleration, and longitudinal airspeed are continuously measured on board the aircraft. The second system is similar to the first with the exception that longitudinal airspeed is deleted as one of the measured variables. These systems are compared with a high-performance automatic flight control system that was designed using classical control techniques. The procedure is also used to design two control systems for a hypothetical aircraft with direct lift control capability. (Author).
Download or read book NASA Technical Note written by and published by . This book was released on 1972 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind tunnel Study of Slot Spoilers for Direct Lift Control written by Dominick Andrisani (II.) and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted in a 300-mph 7- by 10- foot tunnel to obtain data for a slot spoiler direct lift control system. Slot spoilers are believed to have advantages over flap-type direct lift control (DLC) systems because of the small amount of power required for actuation. These tests, run at a Reynolds number of 1,400,000 showed that up to 78 percent of the lift due to flap deflection could be spoiled by opening several spanwise slots within the flaps. For a given lift change the drag change was significantly less than that which would be obtained by a variable flap DLC system. A nozzle-shaped slot was the most effective of the slot shapes tested.
Download or read book Flight Test Results of a Trailing Edge Flap Designed for Direct lift Control written by Charles R. Taylor (Jr.) and published by . This book was released on 1969 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report investigates boundary layer control and trailing edge flaps for direct-lift control.
Download or read book Aircraft Landing Systems written by ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE) and published by . This book was released on 1970 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: All weather landing; An international airline views automatic landing systems; Psychological and procedural aspects related to ILS approaches and landings in visibilities less than 1200 feet; New developments in landing systems; Automatic landing system optimization using inertial navigation data and modern control theory; Importance of speed control relative to longitudinal touchdown dispersion; New guidance developments for all weather landing; Development of airborne hardware for automatic landing systems; Post 1970 scanning beam approach and landing; Landing VTOL aircraft in adverse conditions and some possible solutions; Experience du centre d'essais en vol francais dans le domaine de l'atterrissage tout temps; Automatic landing systems are here; Aided inertial flight test experiments; The development of automatic landing for BEA operation; Experience gained by B.A.C. and Elliott in the development and service use of automatic landing systems; The autopilot for the C-141 all weather landing system; Direct lift control for approach and landing; Le pilote automatique tapir; Flight control systems with respect to V/STOL automatic landing; Systemes d'atterrissage de Thomson/CSF, LS371 - SATRAM - SYDAC/ILS; Evolutionary extension of ILS; Le systeme d'atterrissage automatique de Concorde.
