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Theory of Characteristics
The theory of characteristics will be presented generally for quasilinear differential equations of the second order in two variables. This is necessary because of the manifold requirements to be demanded from the theory of characteristics.
Date:
September 1949
Creator:
Tollmien, W.
System:
The UNT Digital Library
Combustion efficiencies in hydrocarbon-air systems at reduced pressures
Report presenting results obtained with quiescent fuel-air mixtures and with small diffusion flames, which indicate that combustion efficiencies close to 100 percent were obtained at pressure much lower than those found in turbojet combustors at altitudes of 60,000 feet.
Date:
September 13, 1950
Creator:
Hibbard, Robert R.; Drell, Isadore L.; Metzler, Allen J. & Spakowski, Adolph E.
System:
The UNT Digital Library
Appraisal of Hazards to Human Survival in Airplane Crash Fires
Note presenting a study of the factors that affect the survival of human beings in airplane accidents followed by fire by conducting full-scale crashes of transport- and cargo-type airplanes. Some of the factors studied include thermal injury, toxic gases, missiles, and structural destruction of occupied compartments are provided.
Date:
September 1953
Creator:
Pesman, Gerard J.
System:
The UNT Digital Library
Performance investigation of can-type combustor 1: instrumentation, altitude operational limits and combustion efficiency
Report presenting an investigation of the performance of a single can-type combustor designed for a turbojet engine equipped with an 11-stage axial-flow compressor and a single-stage turbine. The investigation was conducted to determine the altitude operational limits of the engine for two fuels, combustion efficiencies at various simulated conditions of altitude and engine speed, combustor-outlet temperature distribution for several altitudes at constant engine speed, and combustor total-pressure drop.
Date:
September 16, 1948
Creator:
Cook, William P. & Zettle, Eugene V.
System:
The UNT Digital Library
Fatigue Tests of Riveted Joints : Progress Report of Tests of 17S-T and 53S-T Joints
Report presenting the fatigue data obtained at the Aluminum Research Laboratories from tests of various types of 17S-T and 53S-T specimens. The specimens were large enough to represent actual service conditions, but the repetition of loading was more rapid than would occur in ordinary service.
Date:
September 1944
Creator:
Hartmann, E. C.; Lyst, J. O. & Andrews, H. J.
System:
The UNT Digital Library
Tests of a triangular wing of aspect ratio 2 in the Ames 12-foot pressure wind tunnel 2: the effectiveness and hinge moments of a constant-chord plain flap
Report presenting a semispan triangular wing with a constant-chord trailing-edge flap to evaluate the aerodynamic characteristics of the wing with landing speeds up to a Mach number of 0.95. Tests were included to ascertain the effects of the addition of a body and of modifications to the airfoil section. Results regarding the wing alone with low Mach number, wing alone with high Mach number, effect of the body, effect of the flap, effect of Mach number, lift-drag ratio, and wing-profile modifications are provided.
Date:
September 21, 1948
Creator:
Stephenson, Jack D. & Amuedo, Arthur R.
System:
The UNT Digital Library