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A leaf blower, commonly known as a blower, is a device that propels air out of a nozzle to move debris such as leaves and grass cuttings. Leaf blowers are powered by electric or gasoline motors . Gasoline models have traditionally been two-stroke engines , but four-stroke engines were recently introduced to partially address air pollution concerns.
An early example of a lobe pump is the Roots Blower, patented in 1860 [1] to blow combustion air to melt iron in blast furnaces, but now more commonly used as an engine supercharger. Lobe pumps are used in a variety of industries including pulp and paper, chemical, food, beverage, pharmaceutical, and biotechnology. They are popular in these ...
It was founded in 1854 by the inventors Philander Higley Roots and Francis Marion Roots. It is notable for the Roots blower, a type of pump. [1] Today, Roots blowers are mainly used as air pumps in superchargers for internal combustion engines; they were first used in blast furnaces to blow combustion air to melt iron. [2]
Air cycle machines were first developed in the 19th century for providing chilling on ships. The technique is a reverse Brayton cycle (the thermodynamic cycle of a gas turbine engine) and is also known as a Bell Coleman cycle or "Air-Standard Refrigeration Cycle".
Weight of fuel is a consideration, but it is reported to start with 150 m (500 ft) per minute climb rate that doubles as the fuel burns off. While this model has been limited to 102 km/h (55 knots), the prototype of the JB-10 is reported to fly at over 200 km/h (110 kn). This is a true jet pack: a backpack that provides jet-powered flight.
The all-purpose lightweight individual carrying equipment (ALICE) is a set of load-carrying equipment adopted as United States Army Standard A on 17 January 1973 [1] to replace the M-1956 individual load-carrying equipment (ILCE) and M-1967 modernized load-carrying equipment (MLCE).
The X2 F39 is based on the same front-wheel drive UKL2 architecture as the X1 and MINI Countryman, [10] and features the same 2,670 mm (105.1 in) wheelbase length. The X2 is assembled in Regensburg, Germany and is produced alongside the X1. [11] Being a part of BMW X family, the vehicle is also available with xDrive all-wheel drive on higher ...