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Schleicher KA6 Rhonsegler
Schneider ES Ka 6

 

sch-ka-6
KA6CR

 

Designed by Rudolf Kaiser and developed by Rudolf Hesse, the Ka 6 series of single-seat Standard Class sailplanes first flew in prototype form in November 1955, with a wing span of 14m (45ft 11 in), and the type's high performance and attractive price led to steady sales and widespread use in contest flying; more than 1,400 Ka 6s had been built when production ceased in 1968, and the type has been widely exported.
 
Of conventional wooden construction with ply and fabric covering, the Ka 6 has cantilever high-set single-spar wings of pine and plywood, covered with fabric; they have a forward sweep of 1° 12' and 3° of dihedral. Schempp-Hirth air brakes are fitted and the wooden ailerons are plywood-covered. The wooden semi-monocoque fuselage is also ply-covered, and the cantilever tail unit is of similar construction to the wings, and a trim tab in the elevator is an optional fitting.
 
In 1956, when the Standard Class regulations were revised, the wing span was increased to 15m (49ft 2.5 in), this version being the Ka 6B with a landing skid under the fuselage, and the Ka 6BR with a non-retractable monowheel in place of the skid. The Ka-6B won the OSTIV prize for the best Standard Class design at the 1958 World Championships at Leszno, Poland.
 
The -6C version was a -6B with modified wing root. It has more of the wing covered with plywood and incorporates other minor improvements, and also comes in skid and wheeled (-6CR) models. The Ka 6CR has a non-retractable unsprung monowheel with a band-brake, and both the Ka 6C and CR have a tailskid. The pilot sits under a one piece blown Plexiglas canopy just ahead of the wing leading edge. All models have airbrakes for approach control. Some later -6CR models are designated as Ka-6CRPE’s, the PE standing for pendulum elevators (the all-moving tail used on the Ka-6E).
 
Schl-Ka6-CR
Ka 6CR
 
An Australian-built version of the Ka 6CR was produced by Edmund Schneider Pty Ltd, the makers of the prewar Grunau Baby, who had transferred their operations to Australia after the war. Known as the ES Ka 6, this licence-built Australian version first flew in December 1961, and had many changes to suit Australian conditions. The keefer main spar was retained, but the rest of the structure was changed to spruce. The monowheel was enlarged to allow interchangeability with that of the ES 52 Kookaburra, and a new sideways-hinging metal-framed Perspex canopy was introduced. Lifting handles were also provided at the nose and tail. Schneider built seven ES Ka 6s, and was planning to start a further batch of four late in 1964, but production was ended apparently before the latter were built.
 
At the 1958 World Championships at Leszno in Poland, a Ka 6 flown by Heinz Huth of Germany came 3rd in the Standard Class, and Rudolf Kaiser was awarded the prize for the best sailplane design in this class for the Ka6. Heinz Huth of Germany won in the Standard Class at the 1960 Koln-Butzwelerhof, Germany and 1963 Junin, Argentina World Championships in Ka-6’s; 16 of the 35 Standard Class entries in 1960 were Ka 6s, which took 2nd, 4th, 5th and 6th places, and in 1963 22 out of 38 Standard Class entries were also Ka 6s, the best position gained by a Ka 6CR was 6th place, taken by W. Scott of the USA. In 1963 two Ka-6’s were flown 876.0 km / 544.3 miles by Karl Betzler and Otto Schauble from Germany to France, setting a world distance record, and in 1964, Wally Scott of the U.S. flew his Ka-6CR to a world goal of 837.7 km / 520.55 miles.
 
The Ka-6E was produced concurrently with the Ka-6CR for three years. The Ka 6E Standard Class single-seater differs from the Ka 6CR in having a revised wing with modified leading edge profile and mounted just a little bit lower on the fuselage, a slightly different fuselage profile of 10% less cross-sectional area, a slightly longer cockpit canopy lowered by three inches and a redesigned tail unit, with a taller fin and rudder and a low-set all-moving tailplane; the latter is the same (except for the lack of trim tabs) as on the Ka 10, which did not go into production and was a modified Ka 6CR with the tailplane moved to about one-third of the way up the fin. Like the CR, the Ka 6E has Schempp-Hirth air brakes, and tailpiane stability and trimming are controlled by a single lever which adjusts the spring tension on the control column; glassfibre wing tips are featured. The Ka 6E first flew in the spring of 1965, and the E version took part in many national championships and other contests. It is of the same wooden construction with ply and fabric covering as the Ka 6CR, and the landing gear is the same except that the monowheel is now retractable.
 
Schl-Ka6-E
Ka-6E
 
Hans Werner Grosse of Germany, flying a Ka-6E as a guest, was the highest scoring pilot at the 1965 U.S. Nationals. Wally Scott won the 1967 Barringer Trophy by flying 888 km / 552 miles in a Ka-6E. One belongs to the National Soaring Museum.

 

No. Built:
Ka-6CR: 1400
Ka-6E: 600

Schleicher Ka 6 Rhönsegler
Length: 21.982 ft / 6.7 m
Wingspan: 49.213 ft / 15.0 m
Max take off weight: 661.5 lb / 300.0 kg
Max. speed: 108 kt / 200 km/h
Crew: 1

Schleicher Ka 6b Rhönsegler

Length: 21.916 ft / 6.68 m
Wingspan: 49.213 ft / 15.0 m
Max take off weight: 661.5 lb / 300.0 kg
Max speed: 108 kt / 200 km/h
Crew: 1

Ka-6CR
Wing span: 15m / 49.2ft
Wing area: 12.45sq.m / 134sq.ft
Length: 21 ft 10 in
Height: 5 ft 1.5 in
Empty Weight: 190kg / 420lb
Payload: 114kg / 250lb
Gross Weight: 304kg / 670lb
Max speed: 124 mph
Max aero-tow speed: 87 mph
L/DMax: 31 80 kph / 43 kt / 50 mph
MinSink: 0.61 m/s / 2.0 fps / 1.18 kt at 42 mph
Wing Load: 24.41kg/sq.m / 5lb/sq.ft
Aspect ratio: 18.1
Airfoil: NACA 63-618/63-615
Seats: 1
 
Ka-6E
Wing span: 15 m / 49.2 ft
Wing area: 12.41 sq.m / 133.6sq.ft
Length: 21 ft 10 in
Height: 5 ft 3 in
Empty Weight: 190 kg / 420 lb
Payload: 110 kg / 243 lb
Gross Weight: 300 kg / 663 lb
Max speed: 124 mph (in smooth air)
Max aero-tow speed: 87 mph
L/DMax: 33 80 kph / 43 kt / 50 mph
MinSink: 0.62 m/s / 2.03 fps / 1.20 kt
Wing Load: 24.17 kg/sq.m / 4.97 lb/sq.ft
Aspect ratio: 18.1
Airfoil: NACA 63-618
Seats: 1

 

sch-ka6-ld
Schleicher Ka 6 Rhönsegler
 

sch-ka6b-ld

Schleicher Ka 6b Rhönsegler

 


 

 


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