Schleicher Ka 2 Rhönschwalbe
{{Short description|German two-seat glider, 1953}}
{{Multiple issues|
{{Lead too short|date=June 2022}}
{{More citations needed|date=June 2022}}
}}
{{Infobox Aircraft Begin
| name=Ka2 Rhönschwalbe | image=Ka2b after landing.jpg | caption=A Ka–2 on landing }}{{Infobox Aircraft Type | type=two-seat training glider | national origin=Germany | manufacturer=Alexander Schleicher GmbH & Co | designer=Rudolf Kaiser | first flight= Spring 1953 | introduced= | retired= | status= | primary user= | more users= | produced=1953 - 1957 | number built=Ka–2 42 built, Ka–2b 75 built | program cost= | unit cost= | developed from= | variants with their own articles= }} |
The Schleicher Ka-2 Rhönschwalbe is a tandem two-seat training glider designed and built in Germany, in 1952.
Design and development
Designed by Rudolf Kaiser, the Ka-2 was an all wooden glider with plywood and aircraft fabric covering. The Ka-2s wings, with marked forward sweep and dihedral are mounted above the fuselage, flanking the rear cockpit. The front cockpit is covered by a one piece plexiglas canopy which opens to the right and the rear cockpit is covered by a canopy incorporating the inner leading edges of the wing, opening rear-wards, held in place by the front canopy when closed.{{cite book|last=Seliger|first=Peter F.|title=Rhön-Adler. 75 Jahre Alexander Schleicher Segelflugzeugbau|date=1 January 2003|publisher=R. G. Fischer Verlag|location=Frankfurt a.M.|isbn=3830104375|language=German}}
The undercarriage of the Ka-2 comprises a large rubber-sprung wooden skid under the forward fuselage in front of a non-retractable semi recessed mainwheel, as well as a steel rubber-sprung tail-skid. Conventional controls are fitted with ailerons on each wingtip trailing edge, elevator with anti-balance trim tab behind the tailplane and rudder aft of the fin. Schempp-Hirth airbrakes, at 38% chord and approx ⅓ span, open out above and below the wing to provide approach control.
Performance of the Ka-2 was found to be lower than expected, due to the relatively high wing loading. Schleicher introduced the Ka2b, increasing the wingspan from {{convert|15|m|ft|abbr=on}} to {{convert|16|m|ft|abbr=on}}, to improve the efficiency of the wing. Fuselage length was also increased by {{convert|18|cm|in|abbr=on}} to {{convert|8.15|m|ft|abbr=on}} to maintain stability margins in pitch.
Performance of the Ka-2b was improved in weak thermals due to a lower minimum sink speed, allowing tighter thermalling. Cross-country performance was also improved by a higher glide ratio, increasing the chance of reaching the next thermal. The standard competition handicap for the Ka–2 is 74 and the Ka-2b handicap is 78.
Operational history
The Ka-2 and Ka-2b saw extensive use in gliding clubs throughout Germany and Europe and the Ka2b was also used in several record attempts; On 24 January 1959 Dieter Schmitt and Karl Pummer climbed a Ka-2b {{convert|6907|m|ft|abbr=on}} in lee wave lift at Fayence in France for a new German National two-seater record climb. Later the same day flying to {{convert|7700|m|ft|abbr=on}} to set a new German two-seater absolute altitude record.
A Ka2b also set a distance record for two seaters in Germany of {{convert|424.5|km|mi nmi|abbr=on}} in 1964 and again on 28 May 2012 at
{{convert|684|km|mi nmi|abbr=on}}, flown by Uli Schwenk and his 81-year-old father.
Variants
;Ka-2: The initial production glider with a {{convert|15|m|ft|abbr=on}} span wing and {{convert|7.97|m|ft|abbr=on}} long fuselage.
;Ka-2b:An improved performance version with {{convert|16|m|ft|abbr=on}} span wings and {{convert|8.15|m|ft|abbr=on}} fuselage.
Specifications (Ka-2)
{{Aircraft specs
|ref=Sailplanes 1945-1965,{{cite book |last=Simons |first=Martin |title=Sailplanes 1945-1965 |url=https://archive.org/details/sailplanes00simo |url-access=limited |year=2006 |publisher=EQIP Werbung und Verlag |location=Königswinter |isbn=978-3-9807977-4-0 |edition=2nd revised|pages=[https://archive.org/details/sailplanes00simo/page/n82 80]–82}} and The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde{{cite book |last=Shenstone |first=B.S. |title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde|year=1958 |publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue |location=Zurich |pages=82–87 |edition=1st |author2=K.G. Wilkinson |language=English, French, German}}
|prime units?=met
|genhide=
|crew=2
|capacity=
|length m=7.97
|length ft=
|length in=
|length note=
|span m=15
|span ft=
|span in=
|span note=
|upper span m=
|upper span ft=
|upper span in=
|upper span note=
|mid span m=
|mid span ft=
|mid span in=
|mid span note=
|lower span m=
|lower span ft=
|lower span in=
|lower span note=
|swept m=
|swept ft=
|swept in=
|swept note=
|dia m=
|dia ft=
|dia in=
|dia note=
|width m=
|width ft=
|width in=
|width note=
|height m=1.7
|height ft=
|height in=
|height note=
|wing area sqm=16.8
|wing area sqft=
|wing area note=
|swept area sqm=
|swept area sqft=
|swept area note=
|volume m3=
|volume ft3=
|volume note=
|aspect ratio=13.4
|airfoil=Wing root: Göttingen 533 modified 16%, Mid span: Göttingen 533 14%, Wing tip: Göttingen 533 12%
|empty weight kg=254
|empty weight lb=
|empty weight note=
|gross weight kg=460
|gross weight lb=
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=
|lift kg=
|lift lb=
|lift note=
|more general=
|eng1 number=
|eng1 name=
|eng1 type=
|eng1 kw=
|eng1 hp=
|eng1 kn=
|eng1 lbf=
|eng1 note=
|power original=
|thrust original=
|eng1 kn-ab=
|eng1 lbf-ab=
|eng2 number=
|eng2 name=
|eng2 type=
|eng2 kw=
|eng2 hp=
|eng2 kn=
|eng2 lbf=
|eng2 note=
|eng2 kn-ab=
|eng2 lbf-ab=
|eng3 number=
|eng3 name=
|eng3 type=
|eng3 kw=
|eng3 hp=
|eng3 kn=
|eng3 lbf=
|eng3 note=
|eng3 kn-ab=
|eng3 lbf-ab=
|more power=
|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|rot number=
|rot dia m=
|rot dia ft=
|rot dia in=
|rot area sqm=
|rot area sqft=
|rot area note=
|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|max speed note=
|max speed mach=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=58.5
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=170
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=in smooth air
- Rough air speed max: {{convert|130|km/h|mph kn|abbr=on|0}}
- Aerotow speed: {{convert|130|km/h|mph kn|abbr=on|0}}
- Winch launch speed: {{convert|100|km/h|mph kn|abbr=on|0}}
|minimum control speed kmh=
|minimum control speed mph=
|minimum control speed kts=
|minimum control speed note=
|range km=
|range miles=
|range nmi=
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=+4g at {{convert|126|km/h|mph kn|abbr=on}}, -2g at {{convert|168|km/h|mph kn|abbr=on}}
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|sink rate ms=0.9
|sink rate ftmin=
|sink rate note=at {{convert|65|km/h|mph kn|abbr=on}} at {{convert|415|kg|lb|abbr=on}}
|lift to drag=26:1 at {{convert|80|km/h|mph kn|abbr=on}} at {{convert|415|kg|lb|abbr=on}}
|wing loading kg/m2=27.4
|wing loading lb/sqft=
|wing loading note= at {{convert|460|kg|lb|abbr=on}}
|disk loading kg/m2=
|disk loading lb/sqft=
|disk loading note=
|more performance=
}}
See also
Notes
{{reflist}}
References
{{refbegin}}
- {{cite book |last=Simons |first=Martin |title=Sailplanes 1945-1965 |url=https://archive.org/details/sailplanes00simo |url-access=limited |year=2006 |publisher=EQIP Werbung und Verlag |location=Königswinter |isbn=978-3-9807977-4-0 |edition=2nd revised|pages=[https://archive.org/details/sailplanes00simo/page/n82 80]–82}}
- {{cite book |last=Shenstone |first=B.S. |title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde|year=1958 |publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue |location=Zurich |pages=82–87 |edition=1st |author2=K.G. Wilkinson |language=English, French, German}}
- {{cite book|last=Seliger|first=Peter F.|title=Rhön-Adler. 75 Jahre Alexander Schleicher Segelflugzeugbau|date=1 January 2003|publisher=R. G. Fischer Verlag|location=Frankfurt a.M.|isbn=3830104375|language=German}}
{{refend}}
Further reading
- Richard und Monique Ferrière: Les Planeurs et Motoplaneurs d' Alexander Schleicher 1951–1981. Motorbuch-Verlag, Stuttgart 1988, {{ISBN|3613011905}}.
External links
{{commons category|Schleicher Ka 2}}
- [http://www.j2mcl-planeurs.net/dbj2mcl/planeurs-machines/planeur-fiche_0int.php?code=1230 French gliding website]
{{Schleicher}}
{{DEFAULTSORT:Schleicher Ka 2 Rhonschwalbe}}