spin combustion
51Fuel economy in automobiles — Fuel consumption monitor from a 2006 Honda Airwave …
52Fer — Pour les articles homonymes, voir Fer (homonymie) …
53advanced ceramics — ▪ ceramics Introduction substances and processes used in the development and manufacture of ceramic materials that exhibit special properties. As is pointed out in the article ceramic composition and properties, ceramics are… …
54Hemoglobin — Hemoglobin, human, adult (heterotetramer, (αβ)2) Structure of human hemoglobin. The protein s α and β subunits are in red and blue, and the iron containing heme groups in green. Fro …
55Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …
56Robot combat — Not to be confused with Military robots. A spinner type robot attacks Robot combat is a hobby/sport in which two or more custom built machines use varied methods of destroying or disabling the other. As of today, in most cases these machines are… …
57ballistics — ballistician /bal euh stish euhn/, n. /beuh lis tiks/, n. (usually used with a sing. v.) 1. the science or study of the motion of projectiles, as bullets, shells, or bombs. 2. the art or science of designing projectiles for maximum flight… …
58rocket and missile system — ▪ weapons system Introduction any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion. Rocket is a general term used broadly to describe a variety of jet propelled missiles… …
59Aircraft — An aircraft is a vehicle which is able to fly through the Earth s atmosphere or through any other atmosphere. Rocket vehicles are not aircraft if they are not supported by the surrounding air. All the human activity which surrounds aircraft is… …
60Top Fuel — Racing is a class of drag racing in which the cars are run on a maximum of 90% nitromethane and about 10% methanol (also known as racing alcohol), instead of gasoline. The cars are purpose built race cars, with a layout superficially resembling… …
