when combustion
121Tractor — This article is about a vehicle used in agriculture or construction. For the power unit of a semi trailer truck (articulated lorry), see tractor unit. For other uses, see Tractor (disambiguation) …
122Flame — A flame is often defined as the visible (light emitting) part of a fire. Physically, it is caused by a highly exothermic reaction (for example, combustion, a self sustaining oxidation reaction) taking place in a thin zone. A flame generally emits …
123Oxygen sensor — Contents 1 Automotive applications 1.1 Function of a lambda probe 1.2 The probe …
124Rocket propellant — is mass that is stored, usually in some form of propellant tank, prior to being used as the propulsive mass that is ejected from a rocket engine in the form of a fluid jet to produce thrust.Chemical rocket propellants are most commonly used,… …
125Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
126Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is …
127Oil shale extraction — is an industrial process in which kerogen mdash;a mixture of organic chemical compounds (including hydrocarbons) found in oil shale mdash;is converted into synthetic crude oil through pyrolysis. In pyrolysis, oil shale is heated in the absence of …
128flight, history of — ▪ aviation Introduction development of heavier than air flying machines. Important landmarks and events along the way to the invention of the airplane include an understanding of the dynamic reaction of lifting surfaces (or wings), building… …
