Download or read book On the Effect of Gusts and Crosswind on the Dynamic Response of Aircraft in the Landing Approach written by P. Hamel 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 Technical Information Indexes written by United States. Naval Air Systems Command and published by . This book was released on 1975 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1975 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book A Study of Flight Control Requirements for Advanced Winged Earth to orbit Vehicles with Far aft Center of gravity Locations written by Andrew K. Hepler and published by . This book was released on 1982 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of flight control requirements for advanced winged earth to orbit vehicles with far aft center of gravity locations written by and published by . This book was released on 1982 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Contractor Report written by and published by . This book was released on 1981 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation by Analog Computer of the Effects of Vertical Gusts on the Longitudinal Dynamics of Two Aircraft in a Carrier Landing Approach written by Richard O. Thomas and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analog computer investigation was conducted to determine the effect of vertical gusts on the longitudinal motion of two aircraft in a carrier landing approach. The aircraft investigated were the F-8A and F3D. Dynamic response to step disturbances of the elevator determined the general stability of the F-8A and short and long periods of aircraft oscillations. The effect of sinusoidal vertical gusts of various frequencies on the longitudinal motion of the F-8A was also investigated. Results of the investigation showed that sinusoidal gusts of period one second or shorter had a negligible effect on the motion of the F-8A, whereas sinusoidal gusts of longer period adversely affect the airplane's motion. Using a linearized input of carrier air wake for the F3D program, it was found that the effects of dynamic-pressure drop in the wake were additive and that these effects caused the aircraft flight path (with the stick fixed) to fall below the ideal flight path. (Author).
Download or read book A Recurrence Matrix Solution for the Dynamic Response of Aircraft in Gusts written by John C. Houbolt and published by . This book was released on 1950 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through the use of difference equations and matrix notation a systematic procedure is developed for the calculation of the structural response of an aircraft flying through a gust. The method takes into account wing bending and twisting flexibilities, fuselage flexibility, vertical and pitching motion of the airplane, and some tail forces. Strip theory is used, but approximate three-dimensional and compressibility corrections can be made without difficulty. Either sharp-edge or arbitrary gusts may be treated.
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey on Effect of Surface Winds on Aircraft Design and Operation and Recommendations for Needed Wind Research written by John C. Houbolt and published by . This book was released on 1973 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1962 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notes on the Dynamic Response of an Aircraft to Gusts on the Variation of Gust Velocity Along the Flight Path written by Anne Burns and published by . This book was released on 1954 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of records showing the time histories of strains and accelerations at various parts of a Lancaster flying in turbulent air is presented and discussed. The records include specimens taken in cloud at moderate altitudes and in clear air at low altitudes ... Examination of the records is divided into two parts: The first deals with the dynamic response of the aircraft to the imposed gusts, with particular reference to the effects of spanwise variation of gust velocity and of damping. In the second part, an attempt is made to deduce the time history and magnitude of the gusts from the measutred response of the aircraft. A point of interest in the curves of gust velocity against time is that a large up-gust tends to be preceded by a large down-gust and vice versa.
Download or read book Government Reports Announcements written by and published by . This book was released on 1971 with total page 1692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of crosswinds on a STOL aircraft during landing written by Craig Ross Jones and published by . This book was released on 1973 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Effects of Gusts on V STOL Craft in Transition and Hover written by Grant Brandford Skelton and published by . This book was released on 1968 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concern in the work reported is the development of statistical models for the gust environment in the earth's boundary layer for use in determining the gust response characteristics of V/STOL aircraft. A general gust model based upon published gust data was developed, and analyses of V/STOL responses with that model were conducted to determine the gust descriptors significant to V/STOL performance. An interim gust model embodying the significant descriptors was then developed for use in V/STOL gust analyses. Suggestions for meteorological experiments to measure the significant descriptors are made. The significant gust descriptors determined from the analyses are the diagonal terms of the gust covariance tensor, gust probability distributions, mean wind probability distributions, and the dependencies of these statistics on thermal stability, surface roughness, and altitude. Less critical descriptors include the off-diagonal components in the gust covariance tensor and the space-time interplay in that tensor. The significant gusts seen by the aircraft are head-on and vertical gusts on the wings; head-on and vertical gust shears across the wings; head-on, side, and vertical gusts on the tail; and head-on and side gusts on the fuselage. Mean airspeed and sideslip angle are important parameters in V/STOL gust responses. The wing-to-tail transport delay of the gusts in forward flight also has a significant effect. V/STOL gust responses at low airspeeds are generally small due to the low dynamic pressures, and the responses are decidedly nonlinear except at low gust amplitudes.
Download or read book Modelling and Simulation of Gust and Atmospheric Turbulence Effects on Flexible Aircraft Flight Dynamics written by Pau Castells Marin and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of the aircraft response to gust and turbulence is of major importance for different purposes. Gust load analysis is an essential part of aircraft design and certification. The effect of gust and turbulence on aircraft flight dynamics is also of interest. Models able to capture relevant effects at these conditions in early design phases are essential in order to anticipate and assess the aircraft response and flight control laws in realistic atmospheric disturbances before flight test. This work proposes a modelling strategy to capture relevant physics when simulating the aircraft response to gust and turbulence for flight dynamics investigations. The model provides accuracy at a low computational cost as well as consistency with gust loads analysis enabling multidisciplinary design. The approach is based on the integration of a nonlinear quasi-steady flexible flight dynamics model with an unsteady aeroelastic model linearized around a nonlinear steady state. The gust-induced forces have a significant impact on aircraft flight dynamics. Low computing times are required to cover several flight conditions and aircraft parameters. A computationally efficient multipoint aerodynamic model, which captures both unsteady aerodynamic and gust propagation effects, is generated from linearized Computational Fluid Dynamics (CFD) simulations in the frequency domain. The model is identified through a rational function approximation allowing for time domain simulations. A reduced number of additional aerodynamic states is sufficient to capture the main effects at low frequencies for flight dynamics analysis. The impact of dynamic flexibility on the response is also evaluated. Only the most energetic flexible modes are retained to reduce the number of states and ensure a low computation time. The approach is applied to simulate the vertical and lateral response of a passenger aircraft to theoretical disturbance profiles as well as realistic atmospheric turbulence at different flight conditions. Aerodynamic nonlinear effects, such as local stalls due to shock motion, in transonic conditions may appear. The linearized model is able to capture the global aircraft response at these conditions with low amplitude shock motions. Results are compared and validated with a CFD simulation based approach, coupled with a structural dynamics and flight mechanics solver. Measures from flight test are also used to assess the modelling approach. The effect of uncertainties on the response is analysed, in terms of the turbulence variation along the wingspan. Simulation results show that relevant aerodynamic effects due to gust and turbulence are captured in the frequency range of interest for flight dynamics investigations.
