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The B&F Fk14 Polaris, also called the FK-Lightplanes FK14, is a single-engine, low-wing ultralight aircraft which seats two side by side. Designed in Germany in the late 1990s, it remains in production.〔Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 50. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X〕 The Cirrus SR Sport, simply called the Cirrus SRS, was a version of the B&F Fk14 Polaris intended to be marketed as a light-sport aircraft by US-based aircraft manufacturer Cirrus Design (now called Cirrus Aircraft), and was promoted from 2007 until its suspension in 2009 during the economic crisis. ==Design and development== Design of the B&F Fk14 Polaris, sometimes known as the Funk Fk 14 Polaris but not by its makers,〔 began in 1998. It first flew in May 1999 and started in production the next year. It is a low-wing, single-engine ultralight, with enclosed accommodation for two seated side by side. Its largely glass fibre (carbon on the Fk14B variant) wing is mostly of parallel chord but toward the tips, where short span aluminium ailerons occupy the trailing edges, the leading edge is swept. Electrically operated Fowler flaps are fitted. Four flap settings are available: +0°, +10°, +20° and +32°. The wingtips incorporate short winglets. The fin and rudder are gently swept; the rudder is deep, reaching the lower fuselage line and moving in a cutout between the elevators. These rear flying surfaces are mass-balanced. The Polaris has spring-trimmed controls.〔 Until 2007 B&F offered a choice of steel framed or monocoque fuselage structures, but since then have produced only the latter. The occupants sit side by side under a single piece, forward-hinged canopy. The standard undercarriage is of tricycle configuration, though a conventional undercarriage is an option. The main legs are fuselage mounted spring cantilevers and the nosewheel is steerable. All wheels are spatted. The Polaris may be fitted with a ballistic parachute (BRS 5) as an option.〔 There is a choice between two of the Rotax 912 series flat four-cylinder engines: either the 60 kW (80 hp) 912 UL or the 74 kW (99 hp) 912 ULS may be fitted. These drive three-blade, ground adjustable pitch propellers.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「B&F Fk14 Polaris」の詳細全文を読む スポンサード リンク
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