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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.
Stihl manufactures a hybrid four stroke engine trimmer that still requires oil to be pre-mixed into the fuel. [citation needed] Battery-powered string trimmers offer cleaner alternatives to consumers by producing zero emissions, being more efficient, and eliminating risks of spilled gasoline. [7]
For example, if the static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 1.3 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength.
A decentralized nationwide movement has seen more than 100 local governments enact at least partial bans on gas ... April 17, 2023 at 2:45 PM. ... leaf blowers, chain saws, edge trimmers and weed ...
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The intercooler of the first Type 45 destroyer, HMS Daring, failed in the mid-Atlantic in 2010 and had to be repaired in Canada, with further repairs for intercooler failure in 2012 in Bahrain. The Type 45's pioneering integrated electric propulsion (IEP) system uses two WR-21s and two Wartsila 2-MW diesel generators to power everything on ...