- Design and development
- Specifications
- References
| name=Stelmaszyk S.1 Bożena | image= | caption= }}{{Infobox Aircraft Type | type=Single seat sport aircraft | national origin=Poland | manufacturer=Władysław Stelmasyk | designer=Władysław Stelmasyk | first flight=6 December 1928 | number built=1
}} |
The Stelmaszyk S.1 Bożena was a one-off, single-seat Polish aircraft, designed and built by a seventeen-year-old. Design and developmentThe Bożena was designed and home-built by seventeen year-old Władysław Stelmaszyk from Ludomy during 1928, with financial help from LOPP. After some public ceremony and a donation of motoring petrol from a local clergyman, Jozefat Skrzypek, a pilot from the Polish Airmen's Association, took it on its first flight on 6 December 1928. The all-wood Bożena was a braced high wing monoplane, with a two-part, constant-chord wing out to semi-elliptical tips. Plywood covered, the wing had a constant section and thickness and was built around two spars. Each half-wing was braced to the lower fuselage longerons by a pair of parallel steel tubes, enclosed in streamlined fairings, they met centrally on a faired pylon forward of the cockpit. The Bożena was powered by a {{convert|35|hp|kW|abbr=on}} Anzani 2A three-cylinder radial engine mounted with its cylinders exposed for cooling in a strongly tapered nose. Its rectangular section fuselage was plywood-covered, with rounded decking behind the cockpit. The empennage was also ply-covered, with a rectangular plan tailplane and elevators mounted on top of the fuselage and a cropped triangular fin carrying a deep rectangular rudder which moved in an elevator cut-out.[[4]] Its fixed landing gear was simple and conventional, with steel V-struts from the lower fuselage longerons and a single axle with rubber shock absorbers. Early test flight reports noted the Bożena's combination of stability in windy conditions with good control responsiveity and manoeuvreability. Its short landing run and easy approach were also noted. It isis known to have made five flights in the winter of 1928-9, some on skis, and it also won a cash prize large enough to cover all costs, including that of the engine.[[4] Later it was on display in the Polish Army Museum in Poznań and in early 1938 returned to Ludomy, where it was destroyed during the German invasion of Poland.[4]] In 1975 Stelmaszyk built a replica of the Bożena for the Museum of Aviation and Astronautics in Krakow[4][10] which remained there, though not on display, in 2009.[11] Specifications {{Aircraft specs
|ref=Cynk, 1971[ except where noted]
|prime units?=met
|genhide=
|crew=One
|length m=6.4
|length note=
|span m=8.4
|span note=
|height m=2.1
|height note=
|wing area sqm=12.4
|wing area note=
|aspect ratio=
|airfoil=
|empty weight kg=180
|empty weight note=
|gross weight kg=310
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=
|more general=
|eng1 number=1
|eng1 name=Anzani A2
|eng1 type=3-cylinder radial
|eng1 hp=35
|eng1 note=
|prop blade number=2
|prop name=wooden
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|perfhide=
|max speed kmh=135
|max speed note=at sea level
|cruise speed kmh=105
|cruise speed note=[4]
|stall speed kmh=
|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=
|wing loading lb/sqft=
|wing loading note=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass=
|thrust/weight=
|more performance=
- Landing Speed: {{convert|55|km/h|mph kn|abbr=on}}
- Landing distance: {{convert|10|m|ft|abbr=on}}
}}References1. ^1 {{cite book |title=Aviation Museums and Collections of Mainland Europe |last= Ogden |first=Bob |coauthors= |edition= |year=2009|publisher= Air Britain (Historians) Ltd|page=426 |isbn=978 0 85130 418 2}}
2. ^1 2 3 4 5 {{cite web |url=http://www.samolotypolskie.pl/samoloty/2772/126/S-1-Bozena |title=S-1 Bożena, 1928 |date= |work= |publisher= |accessdate=13 February 2018}}
3. ^1 {{cite web |url=http://www.samolotypolskie.pl/samoloty/14112/126/S-1-Bozena-replika|title=S-1 Bożena (replika), 1975 |date= |work= |publisher= |accessdate=19 February 2018}}
[1][2][3]
}} 2 : Single-engined tractor aircraft|Polish sport aircraft 1920–1929 |