Even though Rudolf Kaiser designed and built the small motorglider (with its engine located in the nose) K 11 for himself alone, it still belongs in the list of post-war Schleicher aircraft.
This aircraft was created from Ka 6, K 8 and K 9 components and served as the precursor of the K 12/ ASK 14.
When the weather was not good enough to permit flying his own Ka 6 BR, Rudolf Kaiser was able to bridge the thermal gaps with the engine, which also gave it the name „Lückenbüßer“ (or „Gap Filler“).
After a long period of storage in Austria, the K 11 has been brought back to life with great effort by Klaus Seemann who is now flying it in the Rhön at Bad Neustadt.
Technical Data
| Muster / Type | K 11 |
| Klasse / Class | Motorsegler / Motorglider |
| Startart / Take-off | Selbststart / Self launching |
| Sitze / Seats | 1 |
| Erstflug / Maiden flight | August 1964 |
| Herstellungszeitraum / Production period | 1964 |
| Stückzahl / Number of pieces | 1 |
| Konstrukteuer / Designer | Rudolf Kaiser |
| Spannweite / Span | 12.84 m |
| Rumpflänge / Fuselage length | 6.5 m |
| Höhe / Height | 1.6 m |
| Flügelfläche / Wing area | 12.6 m² |
| Flügelstreckung / Wing aspect ratio | 13.1 |
| Flügelprofil / Airfoil | Joukowsky-Tropfen mit NACA-Mittellinie |
| Leermasse / Empty weight | 200 kg |
| Höchstflugmasse / Max. weight | 320 kg |
| Max. Flächenbelastung / Max. wing load | 25.4 kg/m² |
| Geringstes Sinken / Min. sink | 1.0 m/s |
| Gleitzahl / Best glide ratio | 19 |
| Motor / Engine | Göbler-Hirth F 10A 1a |
| Motor-Art / Engine type | 2-Zylinder-2-Takt |
| Startleistung / Take-Off Power | 19 kW (25 PS) @ 5000 U/min |
| Propeller | Kaiser 560-74-134 |
| Durchmesser / Diameter | 1.30 m |
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