PZL Mielec
PZL M28B Bryza "Skytruck" 

The PZL M28 Skytruck is a Polish STOL light cargo and passenger plane, produced by PZL Mielec, as a development of licence-built Antonov An-28s. Early licence-built planes were designated PZL An-28. The maritime patrol and reconnaissance variants are named PZL M28B Bryza ("breeze").

The Antonov An-28 was the winner of a competition against the Beriev Be-30 for a new light passenger and utility transport for Aeroflot's short haul routes, conceived to replace the highly successful An-2 biplane. The An-28 is derived from the earlier An-14. Commonalities with the An-14 include a high wing layout, twin fins and rudders, but it differs in having a reworked and longer fuselage, with turboprop engines. The original powerplant was the TVD-850, but production versions are powered by the more powerful TVD-10B, with three-blade propellers.

Design

The M28 is a twin-engined high-wing strutted monoplane with an all-metal airframe, twin vertical fins and a tricycle fixed landing gear. If an engine fails, a spoiler forward of the aileron opens automatically on the opposite wing. This limits the wing drop to 12° in five seconds instead of 30°.

It is capable of Short takeoff & landing (STOL) and hot and high altitude operations. Aerodynamically deployed leading edge slats when approaching stall speed enable a 64 kn (119 km/h) low stall speed and while the certification landing field is 1,640 ft (500 m), PZL has demonstrated landing in 512 ft (156 m). Inlet air ducts inertial separators and inverted configuration of the PT6 and the high wing configuration protect the engines and propellers against foreign object damage for unprepared runways operations.

Multiple configurations are available: a 19-passenger airliner with 2-1 seating and an underbelly luggage pod; a cargo aircraft with a 1,540 lb (700 kg) hand-cranked hoist option; the most common combi; a VIP transport; a medevac for six litters and seven seats; a search-and-rescue version; a 17-seat paratrooper drop version; an 18-passenger utility cabin and an aerial firefighting version is considered. A crew of two can switch between passenger and cargo configurations in 7 min. Its inward opening rear doors allow for cargo drops and utility operations as well as the passenger boarding.

It can take off in 1,800 ft (550 m) at the 16,534 lb (7,500 kg) MTOW . Maximum payload is 5,070 lb (2,300 kg), it can carry 5,000 lb (2,300 kg) over 100 nmi (190 km) or 2,500 lb (1,100 kg) with full fuel over 700 nmi (1,300 km) Wiki Link