OFW OK-15
| {{Infobox Aircraft Begin
| name=OK-15 | image= | caption= }}{{Infobox Aircraft Type | type=Two-seat light monoplane | national origin=Austria | designer=Otto Kauba | first flight=16 July 1956 | introduced= | retired= | status= | produced= | primary user= | number built=1 | developed from= | variants with their own articles= | developed into= }} |
The OFW OK-15 was a 1950s Austrian two-seat light aircraft. Designed by Otto Kauba and built by the Österreichische Flugzeugwerke GmbH (OFW) at Wiener Neustadt, it was the first aircraft to be designed and built in Austria for 20 years.Gunston, Bill; World Encyclopedia of Aircraft Manufacturers, 2nd ed, Sutton (2005), p.345.
Design and development
The OK-15 was a light sports monoplane of conventional design with a low wing, enclosed side-by-side two-seat cockpit and fixed undercarriage with tailwheel. It was manufactured using traditional materials of metal, wood and fabric, and stressed for aerobatics. It had a span of {{cvt|7.6|m|0}} and length {{cvt|6.5|m|0}}.
The aircraft was powered by a {{convert|105|hp|kW}} Walter Minor 4-III piston engine, giving it an estimated cruise speed of {{cvt|202|km/h|mph kn|0}}.
The only prototype was registered OE-VAM and first flown on 16 July 1956. Subsequent fight tests showed its handling to be unsatisfactory and it was not put into production.[http://www.loan-airport.at/austrias-flight-history/ Austria's Flight History], Loan Airport, Diamond SFCA. (retrieved 6 January 2019).
Specification
{{Aircraft specs|
|ref=Österreichs Luftfahrt in Einzeldarstellungen: Propeller-Luftfahrzeugkonstruktionen seit 1945, Jane's All the World's Aircraft 1958-59.
|prime units?=met
|crew=2
|capacity=
|length m=6.50
|length ft=
|length in=
|span m=7.60
|span ft=
|span in=
|height m=1.73
|height ft=
|height in=
|wing area sqm=11.0
|wing area sqft=
|wing area note=
|aspect ratio=5.25
|airfoil=
|empty weight kg=505
|empty weight lb=
|empty weight note=
|gross weight kg=788
|gross weight lb=
|gross weight note=
|fuel capacity={{cvt|90|L|USgal impgal}}
|more general=
|eng1 number= 1
|eng1 name= Walter Minor 4-III
|eng1 type= 4-cylinder inverted inline air-cooled
|eng1 hp=105
|more power=for take-off
::::{{cvt|80|hp|kW|order=flip|0}} continuous at 2,300 rpm
|prop blade number=2
|prop name=wooden fixed-pitch propeller
|max speed kmh=202
|max speed note=at {{cvt|300|m}}
|cruise speed kmh=180
|cruise speed note=at {{cvt|300|m}}
- Landing speed: {{cvt|75|km/h|mph kn}}
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|range km=630
|range miles=
|range nmi=
|combat range km=
|combat range miles=
|combat range nmi=
|endurance=3 hours 30 minutes with reserve
|ceiling m=4100
|ceiling ft=
|g limits=
|roll rate=
|climb rate ms=
|climb rate ftmin=655
|time to altitude= {{cvt|1000|m}} in 6 minutes 45 seconds
|lift to drag=
|wing loading kg/m2=71.63
|wing loading lb/sqft=
|wing loading note=
|power/mass={{cvt|0.06|hp/lb|order=flip}}
|more performance=
- Take-off run: {{cvt|200|m}} on grass
- Landing run: {{cvt|110|m}} on grass
}}
References
{{reflist|refs=
{{cite journal|journal=Flight |title=Air Intelligence: Austria |date=18 January 1957 |page=73 |accessdate=6 August 2013 |url=http://www.flightglobal.com/pdfarchive/view/1957/1957%20-%200073.html}}
}}
Category:1950s Austrian civil utility aircraft