A simple machine does one of two things: create a mechanical advantage (lever) or change the direction of an applied force (pulley). Fluid foils are unique among simple machines because they not only change the direction of an applied force (wheel and axle); they convert fluid energy into mechanical energy (wind and Kaplan turbines) or vice versa,…

The purpose of this project was to construct and test an off-grid photovoltaic (PV) system in which the power from a solar array could be stored in a rechargeable battery and a flywheel motor generator assembly. The mechanical flywheel energy storage system would in turn effectively power a 12-volt DC appliance. The voltage and current of…

With the decreasing availability of oil and the perpetual dependence on foreign-controlled resources, many people around the world are beginning to insist on alternative fuel sources. Hydrogen fuel cell technology is one answer to this demand. Although modern fuel cell technology has existed for over a century, the technology is only now becoming…

Describes a new technology--the cartridge or logic valve, which streamlines hydraulic systems by decreasing the number of individual components and increasing system efficiency. The author describes and illustrates the principles and components of the valve, explains the types of cartridge inserts, and discusses applications of the system. (CT)

New accommodation for school groups at the Centre for Alternative Technology in Wales enables students to estimate the impact of living on the Earth for a week. This article describes how the cabins were built and designed to teach energy decision-making lessons. (LZ)

The article discusses the need for industrial arts teachers to have an understanding of the sources, conversion, control, transmission, and utilization of power and energy, and outlines a proposed scope and sequence in power and energy technology in an industrial arts education college curriculum. (MF)

Reviews the history of the steam turbine at sea from the 1880s to modern turbines. Presents several pictures of various types of turbines. (YP)

A discussion is presented of future global energy supply and demand problems and two benchmark scenarios showing that time will be the limiting constraint in adapting the energy supply infrastructure to changing resource availability. (Author/SA).

Discusses alternative transportation technological advances in speed, range, battery strategies, and safety facilitated by motor car racing. Presents a historical perspective of the development of steam, electric and gas-powered vehicles and modern versions of electric, and mixed power source cars being tested today. (MCO)

Explores environmental problem management alternatives cited as demonstrating the human potential for renewal and change. These alternatives include (1) management of wolf/rancher confrontations; (2) energy conservation; (3) agribusiness products and practices; (4) solar technology; and (5) air pollution control. (MCO)

Training to provide skilled workers for a large corporation's power plant to be built in Manatee County, Florida, is being planned in area vocational schools and community colleges in collaboration with the corporation. Several photographs illustrate the type of generator, turbine, and other equipment that will be involved in the plant's…

The problem is discussed as to whether man's age-old characteristics of selfishness and greed can be sufficiently overcome to avoid any general world war. It is suggested that if people are to come to terms with the problems confronting them, what the schools teach will be of vital importance. (PB)