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Mousachevo Jastreb
The Jastreb (or Hawk) two-seater fully aerobatic trainer was, with the Kometa-Standard single seater, one of the two indigenous Bulgarian designs that went into production in that country after the war.
The Jastreb was designed by Eng L.Panov and D. Panchovsky, the prototype making its first fight on 6 February 1948; the type was put into small-scale production for the Bulgarian clubs.
Of conventional wood and fabric construction, the Jastreb is a braced high wing monoplane with the centre section swept forward 5° at the quarter-chord line to improve the view from the rear seat, the absence of sweep on the outer panels enabling the spar to be uncranked. The wing is a single-spar wooden structure with leading edge plywood torsion box and is 30% fabric-covered; the wooden ailerons are plywood and fabric covered and there are spoilers in the wing upper and lower surfaces. The plywood-covered wooden fuselage has a metal nose-cap and the two pilots are seated in tandem under a sideways-opening Perspex canopy. The cantilever wooden tail unit is covered with plywood and fabric, and the landing gear consists of a fixed unsprung monowheel with no brake and a rubber mounted skid under the forward fuselage.
Span: 49 ft 2.5 in
Length: 26 ft 3 in
Wing area: 209.9 sq ft
Aspect ratio: 11.55
Empty weight: 529 lb
Max weight: 850 lb
Max speed: 124 mph (in smooth air)
Max aero-tow speed: 75 mph
Min sinking speed: 2.95 ft/sec at 37 mph
Best glide ratio: 20.5:1 mph

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