Evaluation of DIESEL FUELS in Full-Scale Engines (Report of the Cooperative Fuel Research Committee)

1941 ◽  
Author(s):  
W. G. Ainsley
Keyword(s):  
Full Scale ◽  
Research Committee ◽  
Diesel Fuels

Tail Buffeting

1934 ◽  
Vol 38 (278) ◽  
pp. 108-137 ◽  
Author(s):  
W. J. Duncan
Keyword(s):  
United States ◽  
The United States ◽  
Full Scale ◽  
Intensive Study ◽  
Research Committee ◽  
The Subject

The subject of tail buffeting first came into prominence in this country early in 1931 when the Accidents Investigation Sub-Committee of the Aeronautical Research Committee issued their report on the accident to a Junkers monoplane at Meopham, Kent. The Sub-Committee gave it as their opinion that tail buffeting was the probable primary cause of this accident, and recommended that the phenomenon should be investigated. At this time tail buffeting (Leitwerkschutteln) was quite well known in Germany, where the low-wing monoplane, which is peculiarly susceptible to this trouble, was a popular type of aircraft; and some full-scale experiments on the subject had already been made by the Deutsche Versuchsanstalt fiir Luftfahrt. The findings of the Accidents Investigation Sub-Committee caused an intensive study of buffeting to be undertaken both in Germany and in this country, and the enquiry was also taken up in the United States at a later date. As a result of these studies tail buffeting is now quite well understood, and methods for its avoidance have been established.

The Fundamentals of Boundary Layer Theory, with Some Applications to Aircraft

1936 ◽  
Vol 40 (301) ◽  
pp. 65-84 ◽  
Author(s):  
H. Leaderman
Keyword(s):  
Boundary Layer ◽  
Physical Structure ◽  
Boundary Layer Theory ◽  
Full Scale ◽  
Research Committee ◽  
Academic Interest ◽  
Practical Utility ◽  
Different Types ◽  
Scientific Foundation ◽  
And Performance

The recently issued Report of the Aeronautical Research Committee draws attention to the fact that much work, apparently of academic interest only, is now of direct practical utility. In particular, the theories of the boundary layer and of turbulence, though admittedly very incomplete and uncertain and lacking a secure scientific foundation, have been developed to the stage in which they can be applied to explain and predict the behaviour of aircraft, and to show how aircraft may be improved. The physical structure of the boundary layer will be described, and the methods by which the problems have been attacked mathematically to get useful results and to check the theories.In conclusion, the theory of the boundary layer will be applied to the calculation of the drag of an airship or aeroplane fuselage under full-scale conditions, and to an explanation of the behaviour and performance of different types of aerofoils.

Fracture Resistance in Line Pipe

1965 ◽  
Vol 87 (3) ◽  
pp. 265-278 ◽  
Author(s):  
G. M. McClure ◽  
A. R. Duffy ◽  
R. J. Eiber
Keyword(s):  
Fracture Behavior ◽  
Large Diameter ◽  
Full Scale ◽  
Laboratory Studies ◽  
Research Committee ◽  
Line Pipe ◽  
Diameter Pipe ◽  
On Line ◽  
Fracture Tests ◽  
Scale Behavior

The program of research on line pipe under the sponsorship of the A.G.A. Pipeline Research Committee is a comprehensive effort to investigate the important properties of pipe used in gas transmission. Several different phases are involved in this project, ranging from fundamental laboratory studies to fracture-behavior experiments on large-diameter pipe. This paper discusses the full-scale experimental parts of the program in which the fracture toughness of line pipe is being studied. Some of the factors that influence full-scale fracture behavior are discussed—material properties, fracture speed, temperature, wall thickness, nominal stress level, and type of backfill. Laboratory fracture tests that are being run and correlated with full-scale behavior are also described.

Shear Fracture Arrestability of Controlled Rolled Steel X70 Line Pipe by Full-Scale Burst Test

1984 ◽  
Vol 106 (1) ◽  
pp. 55-62 ◽  
Author(s):  
E. Sugie ◽  
H. Kaji ◽  
T. Taira ◽  
M. Ohashi ◽  
Y. Sumitomo
Keyword(s):  
Shear Fracture ◽  
High Strength ◽  
Full Scale ◽  
Research Committee ◽  
Line Pipe ◽  
Iron And Steel ◽  
Propagation Behavior ◽  
Velocity Relationship ◽  
On Line ◽  
Propagating Shear

The High Strength Line Pipe Research Committee organized by the Iron and Steel Institute of Japan has conducted five full-scale burst tests on line pipe of 48 in. o.d. × 0.720 in. w.t. (wall thickness) and grade X70 under pressure of 80 percent SMYS with air: 1) to study the influence of separation on the arrestability of shear fracture, and 2) to obtain the material criterion for arresting the propagating shear fracture. Test pipes of Charpy V notch energy from 80 to 290J with different amount of separation, were produced from both controlled rolled steels and quenched and tempered steels. These research projects clarified that the separation of material itself did not influence the crack propagation behavior and its arrestability. Furthermore, the material criterion for arresting the shear fracture was analyzed by the pressure-velocity relationship counterbalancing the crack velocity curve and gas decompression curve.

The Spinning of Aeroplanes

1927 ◽  
Vol 31 (199) ◽  
pp. 619-688 ◽  
Author(s):  
L. W. Bryant ◽  
S. B. Gates
Keyword(s):  
Wind Tunnel ◽  
Preliminary Report ◽  
Full Scale ◽  
Wind Tunnel Experiments ◽  
Research Committee ◽  
Stability And Control ◽  
The Subject ◽  
Ready Access ◽  
The Stability ◽  
And Control

We should like to preface our essay on the subject of spinning by mentioning the circumstances under which our investigations were carried out and the sources of our information. The Panel of the Aeronautical Research Committee which has been appointed to deal with all questions connected with the stability and control of aeroplanes was requested in 1924 to consider the urgent problems connected with the alarming accidents due to certain machines failing to retover from a spin. After the issue of a preliminary report on the situation by the Panel, the writers of this paper were asked to go into the whole question as far as existing information from full-scale and wind tunnel experiments would permit. We have had ready access to all available data, coming chiefly from Farnborough on the full-scale side, and from the N.P.L. on the model side.

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