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Tainan F-5 / TN-1
Also known by the manufucturers' designation F5, the TN-1 single-seater was designed by Yukio Tanaka and construction of the prototype began in August 1974; this made its first flight in December 1976. The Japan Civil Airworthiness Board was conducting certification trials in the spring of 1978 and it was hoped to begin production in the summer of that year.
Of conventional wood and fabric construction very similar to the Mita III, the TN-1 had cantilever single-spar high wings of spruce and plywood, with fabric covering and a forward sweep of 2" 4' at the quarter-chord line; the wooden ailerons are ply-covered and there are Schempp-Hirth air brakes. The steel tube fuselage framework has fabric covering over wooden stringers, and the nose is of glassfibre. The wooden tail unit has fabric covered elevators and rudder, and there is a trim tab in the starboard elevator. There is a non-retractable unsprung monowheel mounted at the cg with a band brake, plus a tailskid.
Span: 50 ft 10.5 in
Length: 25 ft 0.75 in
Height: 7 ft 2.75 in
Wing area: 172.0 sqft
Aspect ratio: 15.03
Empty weight: 595 lb
Max weight: 837 1b
Max speed: 81 mph (in smooth air)
Max aero-tow speed: 81 mph
Min sinking speed: 2.59 ft/sec
Best glide ratio: 26:1 at 49 mph

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