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Historical osteotome, a medical bone chainsaw. The origin of chainsaws in surgery is debated. A "flexible saw", consisting of a fine serrated link chain held between two wooden handles, was pioneered in the late 18th century (c. 1783 –1785) by two Scottish doctors, John Aitken and James Jeffray, for symphysiotomy and excision of diseased bone, respectively. [2]
The Stihl Timbersports Series is a series of woodsman or wood chopping competitions where the athletes compete in the use of axes and saws in manners typical for lumberjacks. It was founded in 1985, and currently includes six different disciplines, with both professional and collegiate divisions. The terms 'timbersports' and 'timber sports' are ...
An illustration of several key components in a typical four-stroke engine. For a four-stroke engine, key parts of the engine include the crankshaft (purple), connecting rod (orange), one or more camshafts (red and blue), and valves. For a two-stroke engine, there may simply be an exhaust outlet and fuel inlet instead of a valve system.
Investors were pleased with two key numbers from Peloton's financial update. The first was the sales figure of $643.6 million, which represented a 0.20% gain compared to Q4 2023. This was the ...
The hull of the Aleks-251 has a single step and is divided into six watertight compartments. The cabin, 3.10 m (10 ft 2 in) long, 1.40 m (4 ft 7 in) wide and 1.30 m (4 ft 3 in) high seats the pilot and six passengers in three rows, the central one with three seat, the front pair just ahead of the wing leading edge but behind the propeller disks.
The aircraft crashed while on a low-level training flight when it impacted the very steep terrain 800 ft (240 m) below the peak of 7,903 ft (2,409 m) MSL Mazatzal Peak at 495 KIAS under controlled flight in instrument meteorological conditions. Both crew members were killed instantly. No attempts to eject were made.
ALCO 244. The ALCO 244 was a diesel prime mover built by the American Locomotive Company (ALCO). An evolution of the earlier 241 diesel engine, it powered ALCO's first generation of production road locomotives. The 244 engine was developed to create an engine capable of being used in railroad freight and passenger locomotives.
SOCATA Rallye family. The SOCATA Rallye (English: Rally) is a light aircraft that was manufactured by French aviation company SOCATA. It was originally developed during the 1950s by French aircraft manufacturer Morane-Saulnier as the MS.880. On 10 June 1959, the prototype Rallye conducted the type's maiden flight; on 21 November 1961, type ...