Houbolt, John C.
Overview
Works:  58 works in 140 publications in 2 languages and 433 library holdings 

Roles:  Author 
Classifications:  TL574.P7, 629.13 
Publication Timeline
.
Most widely held works by
John C Houbolt
Manual on the flight of flexible aircraft in turbulence = Manuel sur le vol des avions nonrigides en milieu turbulent by
North Atlantic Treaty Organization(
Book
)
7 editions published between 1989 and 1991 in English and held by 58 WorldCat member libraries worldwide
In the course of the past few years the Structures and Materials Panel of AGARD has considered a number of aspects of the turbulence problem as it affects aircraft. The present publication constitutes a review document in which is distilled the experience of specialists from amongst the aircraft manufacturing nations of NATO. It is aimed at those in design offices concerned with the problems of turbulences and resultant loads
7 editions published between 1989 and 1991 in English and held by 58 WorldCat member libraries worldwide
In the course of the past few years the Structures and Materials Panel of AGARD has considered a number of aspects of the turbulence problem as it affects aircraft. The present publication constitutes a review document in which is distilled the experience of specialists from amongst the aircraft manufacturing nations of NATO. It is aimed at those in design offices concerned with the problems of turbulences and resultant loads
A study of several aerothermoelastic problems of aircraft structures in highspeed flight by
John C Houbolt(
Book
)
6 editions published in 1958 in English and held by 48 WorldCat member libraries worldwide
6 editions published in 1958 in English and held by 48 WorldCat member libraries worldwide
Dynamic response of airplanes to atmospheric turbulence including flight data on input and response by
John C Houbolt(
Book
)
4 editions published in 1964 in English and held by 21 WorldCat member libraries worldwide
4 editions published in 1964 in English and held by 21 WorldCat member libraries worldwide
Survey on effect of surface winds on aircraft design and operation and recommendations for needed wind research by
John C Houbolt(
Book
)
3 editions published in 1973 in English and held by 21 WorldCat member libraries worldwide
3 editions published in 1973 in English and held by 21 WorldCat member libraries worldwide
Mathematical modeling and response evaluation for the fluctuating pressures of aircraft buffeting by
John C Houbolt(
Book
)
7 editions published in 1975 in English and Multiple languages and held by 21 WorldCat member libraries worldwide
The report reviews the mathematical modeling of pressure fluctuations in various problems of turbulent flow. Emphasis is on statistical descriptions. The models reviewed are then used to synthesize a mathematical model describing turbulent pressure fluctuations on a buffeting wing. A method of evaluation of structural response to buffet is developed and an example of the method is given. Verification tests of the method are invited
7 editions published in 1975 in English and Multiple languages and held by 21 WorldCat member libraries worldwide
The report reviews the mathematical modeling of pressure fluctuations in various problems of turbulent flow. Emphasis is on statistical descriptions. The models reviewed are then used to synthesize a mathematical model describing turbulent pressure fluctuations on a buffeting wing. A method of evaluation of structural response to buffet is developed and an example of the method is given. Verification tests of the method are invited
Recommended procedures for processing acceleration data obtained by aircraft during atmospheric turbulence encounter by
John C Houbolt(
Book
)
5 editions published in 1975 in English and held by 19 WorldCat member libraries worldwide
AGARD Report No. 586, 'A Summary of Atmospheric Turbulence Recorded by NATO Aircraft' is critiqued. Recommendations are made regarding processing of vertical acceleration data so as to provide useful structural design information. Specific procedures for data reduction are recommended and charts and steps for such data are provided. Consistency in data processing is emphasized
5 editions published in 1975 in English and held by 19 WorldCat member libraries worldwide
AGARD Report No. 586, 'A Summary of Atmospheric Turbulence Recorded by NATO Aircraft' is critiqued. Recommendations are made regarding processing of vertical acceleration data so as to provide useful structural design information. Specific procedures for data reduction are recommended and charts and steps for such data are provided. Consistency in data processing is emphasized
Communication probabilities for orderlyspaced satellites by
John C Houbolt(
Book
)
3 editions published in 1965 in English and held by 18 WorldCat member libraries worldwide
3 editions published in 1965 in English and held by 18 WorldCat member libraries worldwide
Determination of the required number of randomly spaced communication satellites. by
Floyd V Bennett(
Book
)
4 editions published in 1961 in English and held by 14 WorldCat member libraries worldwide
An investigation has been made f o r determining the minimum number of passive satellites i n nearearth orbits required t o provide given percentages of communication time between two selected ground stations. The study is limited to the geometrical and probability aspects of the problem. An application of the analysis i s made f o r an assumed transatlantic communication system. The satellites are considered t o be i n circular, randomly spaced orbits with fixed inclination and altitude considered range from 1,000 t o 3,000 statute miles
4 editions published in 1961 in English and held by 14 WorldCat member libraries worldwide
An investigation has been made f o r determining the minimum number of passive satellites i n nearearth orbits required t o provide given percentages of communication time between two selected ground stations. The study is limited to the geometrical and probability aspects of the problem. An application of the analysis i s made f o r an assumed transatlantic communication system. The satellites are considered t o be i n circular, randomly spaced orbits with fixed inclination and altitude considered range from 1,000 t o 3,000 statute miles
Some landing studies pertinent to gliderreentry vehicles by
John C Houbolt(
Book
)
3 editions published in 1960 in English and held by 14 WorldCat member libraries worldwide
"Results are presented of some landing studies that may serve as guidelines in the consideration of landing problems of gliderreentry configurations. The effect of the initial conditions of sinking velocity, angle of attack, and pitch rate on impact severity and the effect of locating the rear gear in various positions are discussed. Some information is included regarding the influence of landinggear location on effective masses. Preliminary experimental results on the slideout phase of landing include sliding and rolling friction coefficients that have been determined from tests of various skids and allmetal wheels."
3 editions published in 1960 in English and held by 14 WorldCat member libraries worldwide
"Results are presented of some landing studies that may serve as guidelines in the consideration of landing problems of gliderreentry configurations. The effect of the initial conditions of sinking velocity, angle of attack, and pitch rate on impact severity and the effect of locating the rear gear in various positions are discussed. Some information is included regarding the influence of landinggear location on effective masses. Preliminary experimental results on the slideout phase of landing include sliding and rolling friction coefficients that have been determined from tests of various skids and allmetal wheels."
Crossspectral functions based on von Karman's spectral equation by
John C Houbolt(
Book
)
3 editions published in 1972 in English and held by 13 WorldCat member libraries worldwide
Crossspectral functions for the vertical and longitudinal components of turbulence of a twodimensional gust field are derived from the point correlation function for turbulence due to von Karman. Closed form solutions in terms of Bessel functions of order 5/6 and 11/6 are found. An asymptotic expression for large values of the frequency argument, and series results for small values of frequency, are also given. These results now form the base for studying the effect of spanwise variations in turbulence for a turbulence environment which is characterized by the von Karman isotropic spectral relations. Previous studies were based mainly on the Drydentype spectral representation
3 editions published in 1972 in English and held by 13 WorldCat member libraries worldwide
Crossspectral functions for the vertical and longitudinal components of turbulence of a twodimensional gust field are derived from the point correlation function for turbulence due to von Karman. Closed form solutions in terms of Bessel functions of order 5/6 and 11/6 are found. An asymptotic expression for large values of the frequency argument, and series results for small values of frequency, are also given. These results now form the base for studying the effect of spanwise variations in turbulence for a turbulence environment which is characterized by the von Karman isotropic spectral relations. Previous studies were based mainly on the Drydentype spectral representation
A recurrence matrix solution for the dynamic response of aircraft in gusts by
John C Houbolt(
Book
)
6 editions published between 1950 and 1951 in English and held by 11 WorldCat member libraries worldwide
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 threedimensional and compressibility corrections can be made without difficulty. Either sharpedge or arbitrary gusts may be treated
6 editions published between 1950 and 1951 in English and held by 11 WorldCat member libraries worldwide
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 threedimensional and compressibility corrections can be made without difficulty. Either sharpedge or arbitrary gusts may be treated
Differential equations of motion for combined flapwise bending, chordwise bending, and torsion of twisted nonuniform rotor
blades by
John C Houbolt(
Book
)
8 editions published between 1957 and 1958 in English and held by 11 WorldCat member libraries worldwide
The differential equations of motion for the lateral and torsional deformations of twisted rotating beams are developed for application to helicopter rotor and propeller blades. No assumption is made regarding the coincidence of the neutral, elastic, and mass axes, and the generality is such that previous theories involving various simplifications are contained as subcases to the theory developed and presented in this paper. Special attention is given to coupling terms not found in previous theories, and methods of solution of the equations of motion are indicated by selected examples
8 editions published between 1957 and 1958 in English and held by 11 WorldCat member libraries worldwide
The differential equations of motion for the lateral and torsional deformations of twisted rotating beams are developed for application to helicopter rotor and propeller blades. No assumption is made regarding the coincidence of the neutral, elastic, and mass axes, and the generality is such that previous theories involving various simplifications are contained as subcases to the theory developed and presented in this paper. Special attention is given to coupling terms not found in previous theories, and methods of solution of the equations of motion are indicated by selected examples
Critical combinations of shear and transverse direct stress for an infinitely long flat plate with edges elastically restrained
against rotation by
S. B Batdorf(
Book
)
6 editions published between 1945 and 1946 in English and held by 6 WorldCat member libraries worldwide
An exact solution and a closely concurring approximate energy solution are given for the buckling of an infinitely long flat plate under combined shear and transverse direct stress with edges elastically restrained against rotation. It was found that an appreciable fraction of the critical stress in pure shear may be applied to the plate without any reduction in the transverse compressive stress necessary to produce buckling. An interaction formula in general use was shown to be decidedly conservative for the range in which it is supposed to apply
6 editions published between 1945 and 1946 in English and held by 6 WorldCat member libraries worldwide
An exact solution and a closely concurring approximate energy solution are given for the buckling of an infinitely long flat plate under combined shear and transverse direct stress with edges elastically restrained against rotation. It was found that an appreciable fraction of the critical stress in pure shear may be applied to the plate without any reduction in the transverse compressive stress necessary to produce buckling. An interaction formula in general use was shown to be decidedly conservative for the range in which it is supposed to apply
Correlation of calculation and flight studies of the effect of wing flexibility on structural response due to gusts by
John C Houbolt(
Book
)
4 editions published in 1953 in English and held by 6 WorldCat member libraries worldwide
Studies made to evaluate the influence of wing bending flexibility on the structural response to gusts of two twinengine transports and one fourengine bomber are summarized. The studies encompass some previously reported and some new flight studies, some calculation studies based on discrete or singlegust encounter, and some new calculation studies for continuousturbulence encounter, based on the methods of generalized harmonic analysis. It is shown that the discretegust approach reveals the general nature of the flexibility effects and leads to qualitative correlation with flight results. The studies based on the harmonicanalysis approach show good quantitative correlation with flight results and allow for a much greater degree of resolution of the flexibility effects. A good agreement shown suggests that a suitable approach for calculating flexibility effects is now available
4 editions published in 1953 in English and held by 6 WorldCat member libraries worldwide
Studies made to evaluate the influence of wing bending flexibility on the structural response to gusts of two twinengine transports and one fourengine bomber are summarized. The studies encompass some previously reported and some new flight studies, some calculation studies based on discrete or singlegust encounter, and some new calculation studies for continuousturbulence encounter, based on the methods of generalized harmonic analysis. It is shown that the discretegust approach reveals the general nature of the flexibility effects and leads to qualitative correlation with flight results. The studies based on the harmonicanalysis approach show good quantitative correlation with flight results and allow for a much greater degree of resolution of the flexibility effects. A good agreement shown suggests that a suitable approach for calculating flexibility effects is now available
Gustresponse analysis of an airplane including wing bending flexibility by
John C Houbolt(
Book
)
4 editions published in 1952 in English and held by 5 WorldCat member libraries worldwide
An analysis is made of the gust response (including bending moment) of an airplane having the degrees of freedom of vertical motion and wing bending flexibility and basic parameters are established. A convenient numerical solutioin of the response equations, wellsuited for trend studies, is developed and used in an example. A method is indicated for determining the gust causing a known response and a procedure is given for determining the response of an airplane directly from the known response of another airplane
4 editions published in 1952 in English and held by 5 WorldCat member libraries worldwide
An analysis is made of the gust response (including bending moment) of an airplane having the degrees of freedom of vertical motion and wing bending flexibility and basic parameters are established. A convenient numerical solutioin of the response equations, wellsuited for trend studies, is developed and used in an example. A method is indicated for determining the gust causing a known response and a procedure is given for determining the response of an airplane directly from the known response of another airplane
Critical stress of plate columns by
John C Houbolt(
Book
)
3 editions published in 1950 in English and held by 5 WorldCat member libraries worldwide
An exact solution is given for the elastic buckling stress of a flat rectangular plate with simply supported ends when loaded as a column, and an energy solution in which power series and undetermined multiplieres are used is made for the case of fixed ends. The critical stress is given in terms of the Euler columnbuckling value of the load multiplied by a coefficient which depends on the widthlength ratio of the plate. A point of theoretical interest on the buckling of a very wide plate is presented
3 editions published in 1950 in English and held by 5 WorldCat member libraries worldwide
An exact solution is given for the elastic buckling stress of a flat rectangular plate with simply supported ends when loaded as a column, and an energy solution in which power series and undetermined multiplieres are used is made for the case of fixed ends. The critical stress is given in terms of the Euler columnbuckling value of the load multiplied by a coefficient which depends on the widthlength ratio of the plate. A point of theoretical interest on the buckling of a very wide plate is presented
A Method for determining the column curve from tests of columns with equal restraints against rotation on the ends by
Eugene E Lundquist(
Book
)
2 editions published in 1943 in English and held by 5 WorldCat member libraries worldwide
The results are presented of a theoretical study for the determination of the column curve from tests of column specimens having ends equally restrained against rotation. The theory of this problem is studied and a curve is shown relating the fixity coefficient to the critical load, the length of the column, and the magnitude of the elastic restraint. A method of using this curve for the determination of the column curve for columns with pin ends from tests of columns with elastically restrained ends is presented. The results of the method as applied to a series of tests on thinstrip columns of stainless steel are also given
2 editions published in 1943 in English and held by 5 WorldCat member libraries worldwide
The results are presented of a theoretical study for the determination of the column curve from tests of column specimens having ends equally restrained against rotation. The theory of this problem is studied and a curve is shown relating the fixity coefficient to the critical load, the length of the column, and the magnitude of the elastic restraint. A method of using this curve for the determination of the column curve for columns with pin ends from tests of columns with elastically restrained ends is presented. The results of the method as applied to a series of tests on thinstrip columns of stainless steel are also given
Bending and shear stresses developed by the instantaneous arrest of the root of a cantilever beam rotating with constant angular
velocity about a transverse axis through the root by
Elbridge Z Stowell(
Book
)
3 editions published between 1944 and 1945 in English and held by 5 WorldCat member libraries worldwide
A theoretical and experimental investigation has been made of the behavior of a cantilever beam in transverse motion when its root is suddenly brought to rest. Equations are given for determining the stresses, the deflections, and the accelerations that arise in the beam as a result of the impact. The theoretical equations, which have been confirmed experimentally, reveal that, at a given percentage of the distance from root to tip, the bending stresses for a particular mode are independent of the length of the beam, whereas the shear stresses vary inversely with the length
3 editions published between 1944 and 1945 in English and held by 5 WorldCat member libraries worldwide
A theoretical and experimental investigation has been made of the behavior of a cantilever beam in transverse motion when its root is suddenly brought to rest. Equations are given for determining the stresses, the deflections, and the accelerations that arise in the beam as a result of the impact. The theoretical equations, which have been confirmed experimentally, reveal that, at a given percentage of the distance from root to tip, the bending stresses for a particular mode are independent of the length of the beam, whereas the shear stresses vary inversely with the length
Structural response to discrete and continuous gusts of an airplane having wingbending flexibility and a correlation of calculated
and flight results by
John C Houbolt(
Book
)
3 editions published in 1954 in English and held by 5 WorldCat member libraries worldwide
3 editions published in 1954 in English and held by 5 WorldCat member libraries worldwide
Flight and analytical methods for determining the coupled vibration response of tandem helicopters by John E Yeats(
Book
)
3 editions published in 1957 in English and held by 4 WorldCat member libraries worldwide
3 editions published in 1957 in English and held by 4 WorldCat member libraries worldwide
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Related Identities
 United States National Aeronautics and Space Administration
 Langley Research Center
 United States National Advisory Committee for Aeronautics
 Aeronautical Research Associates of Princeton
 North Atlantic Treaty Organization Advisory Group for Aerospace Research and Development Structures and Materials Panel
 Steiner, Roy
 Eidgenössische Technische Hochschule Zürich Institut für Flugzeugstatik und Leichtbau
 Coleman, Thomas L.
 Bennett, Floyd V. Author
 Batterson, Sidney A.
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Associated Subjects
Aerodynamic load AerodynamicsMathematical models AeronauticsResearch Aerothermodynamics Airframes Airplanes AirplanesDesign and construction AirplanesHandling characteristics AirplanesWings AirplanesWingsMathematical models Applications of mathematics Artificial satellites in telecommunication Atmospheric turbulence Bars (Engineering) Bending Bessel functions Boundary layer Buckling (Mechanics) Buffeting (Aerodynamics) Charts, diagrams, etc Columns ColumnsTesting Difference equations Differential equations Drag (Aerodynamics) Elasticity Equations of motion Flight control Gust loads Gust loadsMeasurement Harmonic analysis Lift (Aerodynamics) Loads (Mechanics) Mathematical analysis Mathematics Numerical analysis Plates (Engineering) Propellers, Aerial Rotors (Helicopters) Shear (Mechanics) Space vehiclesAtmospheric entry Spectrum analysis Stability of airplanes Strains and stresses Telecommunication Torsion Turbulence Turbulent boundary layer United States WindsResearch
Alternative Names
Džons Hubolts
John C. Houbolt USamerikanischer Flugzeugingenieur
John Cornelius Houbolt
John Houbolt Amerikaans ruimteingenieur (19192014)
John Houbolt ingegnere statunitense
Джон Губолт
Джон Хуболт
जॉन होबोल्ट
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