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Andreas Stihl designed and hand built his first chainsaw in 1926. [5] The saw was electrically powered, and weighed about 48 kg (106 lb). [6] Stihl grew slowly initially, as the chainsaws came to the market about the same time as the Great Depression; with manpower cheap, and old two-man saws proven, there was no need for power saws.
The Mk. II also included a new transmitter, which had increased in power by a factor of three, from 50 to 150 kW. This extra power offered somewhat better range, but more importantly it allowed the pulse width to be significantly reduced while offering the same range. The sharpness of the echo is a function of the pulse width, so by reducing it ...
A spectrum analyzer is a standard instrument used for RF sweep. It includes an electronically tunable receiver and a display. The display presents measured power (y axis) vs frequency (x axis). The power spectrum display is a two-dimensional display of measured power vs. frequency. The power may be either in linear units, or logarithmic units ...
VI, which first flew on 1 June 1942, was powered by two, single-stage two-speed, 1,460 hp (1,090 kW) Merlin 21s or 1,635 hp (1,219 kW) Merlin 25s, and introduced a re-stressed and reinforced "basic" wing structure capable of carrying single 250-or-500 lb (110-or-230 kg) bombs on racks housed in streamlined fairings under each wing, or up to ...
The Vickers Wellington (nicknamed the Wimpy) is a British twin-engined, long-range medium bomber.It was designed during the mid-1930s at Brooklands in Weybridge, Surrey.Led by Vickers-Armstrongs' chief designer Rex Pierson, a key feature of the aircraft is its geodetic airframe fuselage structure, which was principally designed by Barnes Wallis.
The M242 Bushmaster chain gun is a 25 mm (25×137mm) single-barrel chain-driven autocannon.It is used extensively by the U.S. military, such as in the Bradley fighting vehicle, as well as by other NATO members and some other nations in ground combat vehicles and various watercraft.
A chimney sweep in Wexford, Ireland in 1850. A chimney sweep is a person who inspects then clears soot and creosote from chimneys. The chimney uses the pressure difference caused by a hot column of gas to create a draught and draw air over the hot coals or wood enabling continued combustion. Chimneys may be straight or contain many changes of ...
Oldsmobile engineers selected a conventional, though performance-boosted, Olds 425 cu in (7 L) Super Rocket V8 rated at 385 hp (287 kW) and 475 lb⋅ft (644 N⋅m) of torque. It was an increase of 10 hp (7.5 kW) over the Starfire 425, and an increase of 20 hp (15 kW) over the standard 425 engine in the Ninety-Eight. The Toronado intake manifold ...