Gas turbine engine with convertible accessories

Drive means for connecting a gas turbine engine to its accessories are so constructed as to allow the accessories to be selectively positioned to any one of several predetermined circumferential positions about the perimeter of the engine. This feature permits convenient mounting of the same engine upon vehicles demanding radically different engine mounting arrangements

Asymptotic methods for internal transonic flows

For many internal transonic flows of practical interest, some of the relevant nondimensional parameters typically are small enough that a perturbation scheme can be expected to give a useful level of numerical accuracy. A variety of steady and unsteady transonic channel and cascade flows is studied with the help of systematic perturbation methods which take advantage of this fact. Asymptotic representations are constructed for small changes in channel cross-section area, small flow deflection angles, small differences between the flow velocity and the sound speed, small amplitudes of imposed oscillations, and small reduced frequencies. Inside a channel the flow is nearly one-dimensional except in thin regions immediately downstream of a shock wave, at the channel entrance and exit, and near the channel throat. A study of two-dimensional cascade flow is extended to include a description of three-dimensional compressor-rotor flow which leads to analytical results except in thin edge regions which require numerical solution. For unsteady flow the qualitative nature of the shock-wave motion in a channel depends strongly on the orders of magnitude of the frequency and amplitude of impressed wall oscillations or fluctuations in back pressure. One example of supersonic flow is considered, for a channel with length large compared to its width, including the effect of separation bubbles and the possibility of self-sustained oscillations. The effect of viscosity on a weak shock wave in a channel is discussed

A study of the interaction of a normal shock wave with a turbulent boundary layer at transonic speeds

An asymptotic description is derived for the interaction of a weak normal shock wave and a turbulent boundary layer along a plane wall. In the case studied the nondimensional friction velocity is small in comparison with the nondimensional shock strength, and the shock wave extends well into the boundary layer. Analytical results are described for the local pressure distribution and wall shear, and a criterion for incipient separation is proposed. A comparison of predicted pressures with available experimental data includes the effect of longitudinal wall curvature

Integrated gas turbine engine-nacelle

A nacelle for use with a gas turbine engine is provided with an integral webbed structure resembling a spoked wheel for rigidly interconnecting the nacelle and engine. The nacelle is entirely supported in its spacial relationship with the engine by means of the webbed structure. The inner surface of the nacelle defines the outer limits of the engine motive fluid flow annulus, while the outer surface of the nacelle defines a streamlined envelope for the engine

Integrated gas turbine engine-nacelle

A nacelle for use with a gas turbine engine is presented. An integral webbed structure resembling a spoked wheel for rigidly interconnecting the nacelle and engine, provides lightweight support. The inner surface of the nacelle defines the outer limits of the engine motive fluid flow annulus while the outer surface of the nacelle defines a streamlined envelope for the engine

FEDERAL COURTS-MOTION FOR JUDGMENT UNDER RULE 50(B)POWER OF CIRCUIT COURT OF APPEALS TO DIRECT ENTRY OF JUDGMENT CONTRARY TO VERDICT DIRECTED BY THE TRIAL COURT

In an action for breach of warranty, defendants\u27 motion for a directed verdict was denied and verdict was directed for plaintiff. Defendants\u27 motion for a new trial was denied, and no motion was made for judgment in accordance with their previous motion for directed verdict. The circuit court of appeals reversed and remanded, with directions to enter judgment for defendants. On certiorari, held, reversed. Since defendants had not made timely motion for judgment under Rule 50 (b), the circuit court had no power to direct entry of judgment in their favor. Globe Liquor Co. v. San Roman, (U.S. 1948) 68 S.Ct. 246

CONSTITUTIONAL LAW--DUE PROCESS-FEDERAL RESTRICTIONS ON THE USE OF CONFESSIONS IN STATE CRIMINAL PROCEEDINGS

Undisputed evidence established that petitioner, a negro boy of fifteen, was arrested at about midnight, October 19, 1945 and taken to police headquarters. He was questioned by the police with no friend or counsel present. He was not informed of his right to counsel or of his right to refuse to answer. At about five in the morning, October 20, he confessed. He was then informed of his rights and his statement taken and transcribed. He was photographed by a newspaper photographer, and then placed in jail. On October 23 he was, for the first time, taken before a magistrate and charged with murder. While the accused was in jail, prior to arraignment but after confessing, a lawyer twice attempted to see him and was refused admittance. His mother was not permitted to see him until October 25. There was ample evidence for a conviction had the confession not been used. The jury which found the confession to be voluntary returned a verdict of guilty. Conviction was affirmed by the court of appeals, and appeal to the Supreme Court of Ohio was dismissed. On certiorari, held, reversed. The confession was not voluntary and its use at the trial violated the Due Process Clause of the Fourteenth Amendment. Haley v. State, (U.S. 1948) 68 S.Ct. 302

Ultraviolet and thermally stable polymer compositions

A class of polymers is provided, namely, poly(diarylsiloxy) arylazines. These polymers have a basic chemical composition which has the property of stabilizing the optical and physical properties of the polymer against the degradative effect of ultraviolet light and high temperatures. This stabilization occurs at wavelengths including those shorter than found on the surface of the earth and in the absence or presence of oxygen, making the polymers of the present invention useful for high performance coating applications in extraterrestrial space as well as similar applications in terrestrial service. The invention also provides aromatic azines which are useful in the preparation of polymers such as those of the present invention

Ultraviolet and thermally stable polymer compositions

A new class of polymers is provided, namely, poly (diarylsiloxy) arylazines. These novel polymers have a basic chemical composition which has the property of stabilizing the optical and physical properties of the polymer against the degradative effect of ultraviolet light and high temperatures. This stabilization occurs at wavelengths including those shorter than found on the surface of the earth and in the absence or presence of oxygen, making the polymers useful for high performance coating applications in extraterrestrial space as well as similar applications in terrestrial service. The invention also provides novel aromatic azines which are useful in the preparation of polymers such as those described

Ultraviolet and thermally stable polymer compositions

Copolymers, produced from aromatic substituted aromatic azine-siloxane compositions, are thermally stable, solar ultraviolet light non-degradable by wavelengths shorter than those reaching earth surface