The Yakovlev Yak-18T (Russian: -18T) is a four- or five-seat fully aerobatic utility aircraft. Introduced to train Aeroflot pilots, it has gained some popularity as a sportplane bothinside and outside the former USSR. It is powered by a 268-298 kW (360-400 hp) Vedeneyev M14P radial engine, and is designed for stresses of +6.48/-3.24 g.The 18T was designed in the late 60’s, as a civilian aircraft. The aircraft has a nosewheel, is a four- or five-seater, and has a nine-cylinder 360 hp radial. The Yak-18T shares systems with theYak-50/52 family. These aircraft all have the 265 kW (355 hp) Vedeneyev M14 nine-cylinder radial engine as well as the same underlying compressed-air system for engine starting, brakes, undercarriage and flaps. The propeller, avionics and other parts are also shared. The Yak-18T, like all Russian aircraft used for training, is aerobatic. Compared with other four-seat light aircraft such as the Cessna 172 or the Piper PA-28, the Yak-18T is only a little wider and longer but it is much heavier and is equipped with a considerablymore powerful engine. The Yak-18T is perhaps better compared with the Piper Saratoga which has two extra seats but which has a similar maximum weight, together with a retractable undercarriage and a similarly powerful engine. The Yak-18T is, however, distinguished by its strong construction, aerobatic capability and docile yet responsive handling characteristics. The Yak-18T prototype had its first flight in mid-1967 and subsequently the type was placed in series production in Smolensk. The Yak-18T went on to become the standard basic trainer with Aeroflot flight schools, while small numbers also entered service with the Soviet Air Force as liaison and communications aircraft. After approximately 700 were built, many for Aeroflot, production ceased in the late 1980s, to be resumed in 1993. In 2011 it was claimed that the type remained in small-scale production by the Yakolev Design Bureau, although apparently none had been produced in more than a decade. Technoavia has marketed the SM94, its own development of the Yak-18T, featuring curved windshield, larger fuel tanks and choice of avionics package, but production is dependent on orders being placed.