![]() ![]() ![]() The first prototype made its first flight on 17 October 1988, powered by two Allison 250-C20R/1 engines. Technologies included on the Bo 108 included the first full-authority digital engine controls (FADEC) on a helicopter, a hingeless main rotor, and the adoption of a new transmission. MBB developed it in partnership with Aérospatiale, the Bo 108 was initially intended to be a technology demonstrator, combining attributes of the successful MBB Bo 105 with new advances and an aerodynamically streamlined design. The EC135 started development prior to the formation of Eurocopter under Messerschmitt-Bölkow-Blohm (MBB) under the designation Bo 108 in the 1970s. ![]() The Eurocopter EC635 is a military variant. Half of them are in Europe and a quarter in North America. It is mainly used for helicopter emergency medical services then for corporate transport, law enforcement, offshore wind and military flight training. First flying on 15 February 1994, it entered service in 1996 and 1,300 have been delivered up to January 2018 to 300 operators in 60 countries, accumulating over 4.5 million flight hours. It is capable of flight under instrument flight rules (IFR) and is outfitted with a digital automatic flight control system (AFCS). The Eurocopter EC135 (now Airbus Helicopters H135) is a twin-engine civil light utility helicopter produced by Airbus Helicopters (formerly known as Eurocopter). ![]()
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