Metallic Hydrides I: Hydrogen Storage and Other Gas-Phase Applications

A brief survey is given of the various classes of metal alloys and compounds that are suitable for hydrogen-storage and energy-conversion applications. Comparisons are made of relevant properties including hydrogen absorption and desorption pressures, total and reversible hydrogen-storage capacity, reaction-rate kinetics, initial activation requirements, susceptibility to contamination, and durability during long-term thermal cycling. Selected applications are hydrogen storage as a fuel, gas separation and purification, thermal switches, and sorption cryocoolers

Spin-tunnel investigation of a 1/13-scale model of the NASA AD-1 oblique-wing research aircraft

The spin and recovery characteristics of a 1/13-scale model of the NASA AD-1 oblique-wing research aircraft at wing-skew positions of 0, 25, 45, and 60 deg (right wing forward) were investigated. Spins were obtained for all wing-skew positions tested. For the unskewed wing position, two spin modes were possible. One spin mode was very steep and recoveries were obtained within 1 turn or less by rudder reversal. The second spin mode was flat and fast; the angle of attack was about 75 deg and the spin rate was about 145 deg/sec (2.5 seconds per turn). For the skewed wing positions, spins were obtained only in the direction of the forward-skewed wing (right wing forward). No spins were obtained to the left when the wing was skewed with the right wing forward. Recoveries should be attempted by deflecting the rudder to full against the spin, the ailerons to full with the spin, and movement of the wings to 0 deg skew. If the wing is skewed, the recovery may not be effected until the wing skew approaches 0 deg

Spin-Tunnel Investigation of the Spinning Characteristics of Typical Single-Engine General Aviation Airplane Designs. 1. Low-Wing Model A: Effects of Tail Configurations

The effects of tail design on spin and recovery were investigated in a spin tunnel. A 1/11-scale model of a research airplane which represents a typical low-wing, single engine, light general aviation airplane was used. A tail design criterion for satisfactory spin recovery for light airplanes was evaluated. The effects of other geometric design features on the spin and recovery characteristics were also determined. Results indicate that the existing tail design criterion for light airplanes, which uses the tail damping power factor as a parameter, cannot be used to predict spin-recovery characteristics

Toward Less Monopoly

Acceptance of the importance of economics in antitrust law has become widespread. The Association of American Law Schools has sponsored economic studies to supplement legal teaching materials; practicing lawyers increasingly are seeking economic aid in preparing for antitrust litigation; and recently a federal judge has obtained the assistance of a trained economist for a major Sherman Act case. In addition economics has an equally important role in determining what the law should be

The Life History of the Coyote

The size, weight, and color of coyotes vary, of course, with the subspecies, with the locality, and with the time of year. It would probably be best to introduce this material on the description of the coyote with, first, a general description of members of the family Canidae and, second, with a general description of all coyotes

The Prerequisites and Effects of Resale Price Maintenance

Present law permits the makers of most identifiable products to fix the prices at which these products may be resold (or below which they may not be resold) in most states in the United States. This is permissible on goods which are in free and open competition with other goods of the same general class, and no agreements among competing sellers at any level are sanctioned. These safeguards to competition provide the basis for the contention that the fair-trade laws do not eliminate competition or raise prices. The opposing view is that competition is as important in distribution as in manufacturing, and that dealer competition is inevitably eliminated. Consumers are thus limited in the range of choices they may exercise with respect to service facilities, convenience, or price in the sale of price-maintenance products