Band Pass Shock And Vibration Absorbers For Application To Aircraft Landing Gear

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Band Pass Shock And Vibration Absorbers For Application To Aircraft Landing Gear

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Author : Emanuel Schnitzer
language : en
Publisher:
Release Date : 1956

Band Pass Shock And Vibration Absorbers For Application To Aircraft Landing Gear written by Emanuel Schnitzer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1956 with Airplanes categories.

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.

Experimental Evaluation Of Low Band Pass Landing Gear Shock Absorber For Pulse Loadings

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Author : Emanuel Schnitzer
language : en
Publisher:
Release Date : 1958

Experimental Evaluation Of Low Band Pass Landing Gear Shock Absorber For Pulse Loadings written by Emanuel Schnitzer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Airplanes categories.

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.

Technical Note National Advisory Committee For Aeronautics

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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1958

Technical Note National Advisory Committee For Aeronautics written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Aeronautics categories.

Research Abstracts And Reclassification Notice

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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1954

Research Abstracts And Reclassification Notice written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1954 with Aeronautics categories.

A Selected Listing Of Nasa Scientific And Technical Reports For

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Author :
language : en
Publisher:
Release Date : 1954

A Selected Listing Of Nasa Scientific And Technical Reports For written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1954 with Aeronautics categories.

Index Of Naca Technical Publications

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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1959

Index Of Naca Technical Publications written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Aeronautics categories.

Annual Report National Advisory Committee For Aeronautics

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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1957

Annual Report National Advisory Committee For Aeronautics written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with Aeronautics categories.

Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.

Rate Of Reaction Of Gaseous Fluorine With Water Vapor At 35 Degrees C

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Author : Vernon A. Slabey
language : en
Publisher:
Release Date : 1958

Rate Of Reaction Of Gaseous Fluorine With Water Vapor At 35 Degrees C written by Vernon A. Slabey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Chemical kinetics categories.

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.

U S Government Research Reports

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Author :
language : en
Publisher:
Release Date : 1964

U S Government Research Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Industrial arts categories.

A Compilation Of Research Reports Of Physical Research Division Dynamic Loads Division Loads Division 1921 1973

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Author : Gloria R. Champine
language : en
Publisher:
Release Date : 1977

A Compilation Of Research Reports Of Physical Research Division Dynamic Loads Division Loads Division 1921 1973 written by Gloria R. Champine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Aeronautics categories.