The Sunward STB is a Chinese
amphibious ultralight trike
An ultralight trike is a type of powered hang glider where flight control is by weight-shift. These aircraft have a fabric flex-wing from which is suspended a tricycle fuselage pod driven by a pusher propeller. The pod accommodates either a ...
, designed and produced by
Sunward Tech (Hunan Sunward Science & Technologies Company Limited) of
Zhuzhou
Zhuzhou (, ), formerly Jianning (建宁), is a prefecture-level city of Hunan Province, China, straddling the Xiang River southeast of the provincial capital, Changsha, and bordering Jiangxi province to the east. It is part of the " Greater Chan ...
. The aircraft is supplied complete and ready-to-fly.
[Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', page 242. Flying Pages Europe SARL, 2015. ]
Design and development
The STB is intended for the
search and rescue role, as well as tourist flights and recreational use. It was designed to comply with the
Fédération Aéronautique Internationale microlight
Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with aile ...
category, including the category's maximum gross weight of . The aircraft has a maximum gross weight of .
The aircraft design features a
strut-braced hang glider
Hang gliding is an air sport or recreational activity in which a pilot flies a light, non-motorised foot-launched heavier-than-air aircraft called a hang glider. Most modern hang gliders are made of an aluminium alloy or composite frame cover ...
-style
high-wing
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes.
A monoplane has inherently the highest efficiency and lowest drag of any wing co ...
, weight-shift controls, a two-seats-in-
tandem
Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction.
The original use of the term in English was in ''tandem harness'', which is used for two ...
open cockpit with a rigid boat hull, retractable
tricycle landing gear
Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...
and a single engine in
pusher configuration. The boat hull was designed for use in higher wave conditions.
The aircraft is made from bolted-together
aluminum
Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It ha ...
tubing and composites. It uses a double surface
Grif Hazard wing, made by the Italian company
Grif Italia. The span wing is supported by struts and uses an "A" frame weight-shift control bar. The powerplant is an Austrian-made twin cylinder, liquid-cooled,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...
,
dual-ignition
Dual Ignition is a system for spark-ignition engines, whereby critical ignition components, such as spark plugs and magnetos, are duplicated. Dual ignition is most commonly employed on aero engines,Crane, Dale: ''Dictionary of Aeronautical Terms, ...
Rotax 582
The Rotax 582 is a two-stroke, two-cylinder, rotary intake valve, oil-in-fuel or oil injection pump, liquid-cooled, gear reduction-drive aircraft engine manufactured by BRP-Rotax GmbH & Co. KG. It is for use in non-certified aircraft operating ...
engine or four cylinder, air and liquid-cooled,
four-stroke, dual-ignition
Rotax 912UL
The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, l ...
engine.
The aircraft has an empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload is .
Variants
;STB582
:Model with a
Rotax 582
The Rotax 582 is a two-stroke, two-cylinder, rotary intake valve, oil-in-fuel or oil injection pump, liquid-cooled, gear reduction-drive aircraft engine manufactured by BRP-Rotax GmbH & Co. KG. It is for use in non-certified aircraft operating ...
engine.
;STB912
:Model with a
Rotax 912UL
The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, l ...
engine.
Specifications (STB582)
See also
*
Sunward ST
References
External links
Official website{{Sunward aircraft
STB
State Security ( cs, Státní bezpečnost, sk, Štátna bezpečnosť) or StB / ŠtB, was the secret police force in communist Czechoslovakia from 1945 to its dissolution in 1990. Serving as an intelligence and counter-intelligence agency, it d ...
2010s Chinese sport aircraft
2010s Chinese ultralight aircraft
Single-engined pusher aircraft
Ultralight trikes