Sunward STB

{{Short description|Chinese amphibious ultralight trike}} {{Use dmy dates|date=March 2018}} {{Use British English|date=January 2022}}  {{Infobox aircraft | name = STB | logo = | logo_size = | image = | alt = | caption = | long_caption = | other_names = | aircraft_type = [[Ultralight trike]] | aim = | outcome = | related = | national_origin = [[China]] | manufacturer = [[Sunward Tech]] | design_group = | designer = | builder = | issuer = | status = In production (2018) | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }} The '''Sunward STB''' is a Chinese [[amphibious aircraft|amphibious]] [[ultralight trike]], designed and produced by [[Sunward Tech]] (Hunan Sunward Science & Technologies Company Limited) of [[Zhuzhou]]. The aircraft is supplied complete and ready-to-fly.<ref name="WDLA15">Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', page 242. Flying Pages Europe SARL, 2015. {{ISSN|1368-485X}}</ref>

==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]] category, including the category's maximum gross weight of {{convert|450|kg|lb|0|abbr=on}}. The aircraft has a maximum gross weight of {{convert|450|kg|lb|0|abbr=on}}.<ref name="WDLA15"/>

The aircraft design features a [[strut-braced]] [[hang glider]]-style [[high-wing]], weight-shift controls, a two-seats-in-[[tandem]] open cockpit with a rigid boat hull, retractable [[tricycle landing gear]] and a single engine in [[pusher configuration]]. The boat hull was designed for use in higher wave conditions.<ref name="WDLA15"/>

The aircraft is made from bolted-together [[aluminum]] tubing and composites. It uses a double surface [[Grif Hazard]] wing, made by the Italian company [[Grif Italia]]. The {{convert|10.35|m|ft|1|abbr=on}} 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]], [[dual-ignition]] {{convert|64|hp|kW|0|abbr=on}} [[Rotax 582]] engine or four cylinder, air and liquid-cooled, [[four-stroke]], dual-ignition {{convert|80|hp|kW|0|abbr=on}} [[Rotax 912UL]] engine.<ref name="WDLA15"/>

The aircraft has an empty weight of {{convert|248|kg|lb|0|abbr=on}} and a gross weight of {{convert|450|kg|lb|0|abbr=on}}, giving a useful load of {{convert|202|kg|lb|0|abbr=on}}. With full fuel of {{convert|60|L}} the payload is {{convert|159|kg|lb|0|abbr=on}}.<ref name="WDLA15"/>

==Variants== ;STB582 :Model with a {{convert|64|hp|kW|0|abbr=on}} [[Rotax 582]] engine.<ref name="WDLA15"/> ;STB912 :Model with an {{convert|80|hp|kW|0|abbr=on}} [[Rotax 912UL]] engine.<ref name="WDLA15"/>

==Specifications (STB582) == {{Aircraft specs |ref=Tacke<ref name="WDLA15"/> |prime units?=met  |genhide=

|crew=one |capacity=one passenger |length m= |length ft= |length in= |length note= |span m=10.35 |span ft= |span in= |span note= |height m= |height ft= |height in= |height note= |wing area sqm=15 |wing area sqft= |wing area note= |aspect ratio= |airfoil= |empty weight kg=248 |empty weight lb= |empty weight note= |gross weight kg=450 |gross weight lb= |gross weight note= |fuel capacity={{convert|60|L}} |more general=  |eng1 number=1 |eng1 name=[[Rotax 582]] |eng1 type=twin cylinder, liquid-cooled, [[two stroke]] [[aircraft engine]] |eng1 kw=48 |eng1 hp=

|perfhide=

|max speed kmh=90 |max speed mph= |max speed kts= |max speed note= |cruise speed kmh=60 |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh=38 |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range km= |range miles= |range nmi= |range note= |endurance= |ceiling m= |ceiling ft= |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude= |sink rate ms= |sink rate ftmin= |sink rate note= |lift to drag= |wing loading kg/m2=30 |wing loading lb/sqft= |wing loading note= |power/mass= |thrust/weight= |more performance= |avionics= }} ==See also== *[[Sunward ST]] ==References== {{reflist}}

==External links== *[http://www.sunwardtech.com/product/pgaishu-detail.jsp?id=2378 Official website] {{Sunward aircraft}}

[[Category:Sunward aircraft|STB]] [[Category:2010s Chinese sport aircraft]] [[Category:2010s Chinese ultralight aircraft]] [[Category:Single-engined pusher aircraft]] [[Category:Ultralight trikes]]