The stratosphere (/ËstrÃ¦tÉËsfÉªÉr, -toÊ-/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. About 20% of the atmosphere's mass is contained in the stratosphere.
The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
Stihl 041 AV is probably one of the best chainsaws ever made. It has displacement of 61 cm3, cylinder bore 44 mm, piston stroke 40 mm, 4,0 PS@7500 rpm (5,5 PS@7500 rpm reporte â¦ d when tested by DIN), 3,8 Nm@5000 rpm. It weights 7,5 kg with 33 cm bar and chain without liquids (that would be approx.