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Ammonium perchlorate composite propellant is a composite propellant, meaning that it has both fuel and oxidizer combined into a homogeneous mixture, in this case with a rubbery binder as part of the fuel. The propellant is most often composed of ammonium perchlorate (AP), an elastomer binder such as hydroxyl-terminated polybutadiene (HTPB) or ...
String trimmer. A man using a gasoline-powered string trimmer. A string trimmer, also known by the portmanteau strimmer and the trademarks Weedwacker, Weed Eater and Whipper Snipper, [ 1][ a] is a garden tool for cutting grass, small weeds, and groundcover. It uses a whirling monofilament line instead of a blade, which protrudes from a rotating ...
It is equipped with a recoil starter system or optionally electric start and a 2.1 or 2.6:1 belt reduction drive. The engine runs on a mixture of unleaded auto fuel and oil. Producing 45 hp (34 kW) at 5800 rpm, the G-50 competed in the early 1980s ultralight powerplant market against the similar Rotax 447. Production of the engine was completed ...
Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a controlled manner such as in an internal combustion engine or industrial furnace, or may result in an explosion (e.g., a dust explosion),The air–fuel ratio determines whether a mixture is combustible at all, how much energy is being released ...
A stratified charge can allow for slightly higher compression ratios without "knock," and leaner air/fuel ratio than in conventional internal combustion engines. Conventionally, a four-stroke (petrol or gasoline) Otto cycle engine is fueled by drawing a mixture of air and fuel into the combustion chamber during the intake stroke
Some allow control of the propellant mixture ratio (ratio at which oxidizer and fuel are mixed). Some can be shut down and, with a suitable ignition system or self-igniting propellant, restarted. Hybrid rockets apply a liquid or gaseous oxidizer to a solid fuel. [1]: 354–356
Mixture fraction ( ) is a quantity used in combustion studies that measures the mass fraction of one stream (usually the fuel stream) of a mixture formed by two feed streams, one the fuel stream and the other the oxidizer stream. [ 1][ 2] Both the feed streams are allowed to have inert gases. [ 3] The mixture fraction definition is usually ...
The live NBC broadcast kicks off with a pre-show at noon ET Friday, and the ceremony itself begins at 7:30 p.m. Paris time, or 1:30 p.m. ET. The prime-time encore telecast, which features ...