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Cliffs plan enlarged to 1:3 scale

D-7712 pictures
The Kaiser K-3 "Rhönlaus" - 1953
Many of us have often wondered about the naming of Schleicher sailplanes. Rudolf Kaiser (1922-1991) became best known as designer for Schleicher. Few sailplane pilots are aware that Rudolf Kaiser also designed several sailplanes for the much smaller Scheibe sailplane factory.


The Ka-1 (above) had a wooden fuselage with the same wing & tail as the Ka-3

As an enthusiastic glider pilot he built models and flew his "C" badge in 1942. After the war he became a civil engineer and a self-taught aeronautical engineer. He built his first sailplane, the Ka 1 in 1951/52 in the attic of his parent's house. It was small and easy to build with a wing span of 30ft, 129 lbs. empty weight and a V-tail. The fuselage was a plywood shell construction with a wood and fabric strut supported wing.


The Ka-3 was a re-design using a metal framework fuselage

A year after the Ka 1 was built Kaiser had already flown the Ka 3, a single seater that used the wing and tail of the Ka 1, but the fuselage was of steeltubing construction making it suitable for kit construction



Copy of original Ka 3 drawings


DATA

Ka-1

Ka-3

Wingspan 10m 10m
Wing area 8.9 m2 8.9m2
Aspect ratio 10:1 10:1
Fuselage Length 5.39 m 5.46m
Empty weight 98 kg 103 kg
Max. flying weight 195 kg 195 kg
Wing loading 19.69 kg/m2 19.69 kg/m2
Minimum Sink 0.95 m/s @ 65 km/h 0.95 m/s @ 65 km/h
Best Glide 18 @ 75 km/h 18 @ 75 km/h



Alistair Bodin displays his recently built first scale project Ka-3 from the Charlsworth plan. Alistair flies on Watership Downs near Kingslere and Beacon Hill. Build pictures of this model will be found in Cliff Charlsworths report


The original full-size glider which inspired Cliff to make the plan - see his report