Download or read book Band pass Shock and Vibration Absorbers for Application to Aircraft Landing Gear written by Emanuel Schnitzer and published by . This book was released on 1956 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new class of frequency-selective shock absorbers called band-pass shock absorbers which were conceived as a means of overcoming some of the limitations of conventional shock absorbers is described. These shock absorber designs are introduced, special emphasis being given to their use in landing and taxiing problems of high-speed aircraft. For such aircraft operated on rough land or water runways, conventional oleo struts approach a rigid condition for bum[s with steep slopes and thereby develop and transmit severe shock loads to the aircraft fuselage. The operation of the band-pass shock absorbers in the reduction of loads in certain selected frequency ranges is described. Theoretical equations are derived and solutions are made for several cases for the purpose of comparing the low-pass and conventional shock-absorber actions. The results indicate that the band-pass shock absorbers should alleviate high-frequency or rapidly applied impact loads but should retain the characteristics of conventional oleo struts when taxiing and design landing loads are slowly applied. A number of variations in design are presented for low-pass shock absorbers and reference is made to double-acting band-pass vibration absorbers for other applications.
Download or read book Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1958 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation of Low band pass Landing gear Shock Absorber for Pulse Loadings written by Emanuel Schnitzer and published by . This book was released on 1958 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to determine the practicality of constructing a low- band-pass landing-gear shock absorber and to evaluate its effectiveness in reducing rapidly applied loads. The band-pass principle was first introduced in NACA Technical Note 3803 from a theoretical point of view. For the experimental investigation presented herein, a low-band-pass shock strut was designed, constructed, and tested in conjunction with a high-pressure tire which was used in order to develop and transmit steep pulses. Taxiing runs were made over individual bumps to determine the strut pulse rate response and over consecutive closely spaced bumps to determine strut recycling characteristics. Duplicate tests were made with a comparable shock absorber having a fixed main orifice area. Design details are presented for the shock struts tested and also for a proposed band-pass vibration absorber. The loads for the low-band-pass strut for single rapidly applied pulses were 50 percent of the loads for the fixed-orifice strut whereas for cyclic loading the low-band-pass loads were less than 25 percent of the fixed-orifice strut loads. Smaller reductions were achieved for rapidly applied pulses superposed on slowly applied pulses. There was no attempt in this investigation to develop an optimum control unit to minimize loads for both single and multiple superposed pulses over the entire spectrum of load application rates. The load reductions achieved, however, were accomplished by the addition of a 1-1/2 pound control unit to the shock strut of a 5,000-pound airplane.
Download or read book Research Abstracts and Reclassification Notice written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by and published by . This book was released on 1954 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index of NACA Technical Publications written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1959 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.
Download or read book Rate of Reaction of Gaseous Fluorine with Water Vapor at 35 Degrees C written by Vernon A. Slabey and published by . This book was released on 1958 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorine and water vapor react extremely slowly or not at all in the gas phase at 35 degrees C at partial pressures of the reactants up to 40 mm of mercury. They react at surfaces; the kinetics are first order with respect to each of the reactants.
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compilation of Research Reports of Physical Research Division Dynamic Loads Division Loads Division 1921 1973 written by Gloria R. Champine and published by . This book was released on 1977 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1948 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Analytic Modeling Techniques for Landing Gear Dynamics written by and published by . This book was released on 1982 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to accurately predict the dynamic response of an aircraft while it is operating in the taxi mode depends, in part on the correct modeling of the dynamic characteristics of the landing gear system. Traditionally, landing gear have been designed to absorb landing impact ('shock absorber') and their characteristics during periodic, oscillatory response ('spring') have been considered as secondary. With the increased emphasis on the rough or damaged field taxi operation, there is a requirement to determine the best methods for modeling the gear system. This report documents a brief review of the state of the art of gear modeling. A study was then conducted to evaluate important model parameters, using a simple cantilevered gear computer simulation. Also included is the development of a technique for the experimental determination of important gear system parameters. (Author).
Download or read book Report written by and published by . This book was released on 1953 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1953 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Royal Aeronautical Society written by Royal Aeronautical Society and published by . This book was released on 1957 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1956 with total page 1640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Uso de terrenos otros recursos naturales infraestructura written by and published by . This book was released on 1974 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
