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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.
Citing measurements made at the 1925 Iowa State Fair, they reported that the peak power over a few seconds has been measured to be as high as 14.88 hp (11.10 kW) [11] and also observed that for sustained activity, a work rate of about 1 hp (0.75 kW) per horse is consistent with agricultural advice from both the 19th and 20th centuries and also ...
Suited for ultralight use and single seat light sport aircraft, the engine weighs 86 lbs and produces 40 hp (30 kW). The engine uses a short aluminum crankcase with redesigned oil galleries for improved lubrication. The engine is counterweight balanced with a drop-forged crankshaft.
In addition to 3,000-shp output, the targets for AATE were a 25% reduction in fuel consumption (less than 0.347 lb/(hp⋅h), 211 g/kWh), a 65% improvement in power to weight (more than 6.5 hp/lb, 10.7 kW/kg), a 20% improvement in design life (more than 6000 hours and 15000 cycles), a 35% reduction in production (less than $650k per engine) and maintenance cost, and a 15% reduction in product ...
[1] [4] However, as many as 99% of professional competitors don't build their own hot saw, instead buying them from specialist engineers, with 80% of saws on the American circuit built by Russ Lemke; Lemke's saws match reliability with power and have been called "the Stradivarius of its ilk" by Stihl. Several are also built and sold by event ...
The angle domain equations above show that the motion of the piston (connected to rod and crank) is not simple harmonic motion, but is modified by the motion of the rod as it swings with the rotation of the crank.
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 ...
The Pike is a precision-guided mini-missile [1] or grenade munition designed by Raytheon.It is a 40 mm guided munition that can be fired from the barrel of a Heckler & Koch M320 Grenade Launcher Module and FN Enhanced Grenade Launching Module (EGLM) like a standard 40mm grenade, but is powered by a rocket motor to propel it 2,000 m (2,200 yd; 1.2 mi) to give infantrymen improved extended-range ...