This Ka-4, ZK-GBE, was the first glider I flew in. This was around 1958 when I was about 12. The flight was made at Hastings airfield in Hawkes Bay, NZ. Launch was an aero tow behind a Tiger Moth. The registered owner of ZK-GBE at 1.10.2000 was:
M M Schicker
147 St Aubyn Street
The Rhonlerche is a small, strut-braced, 2-seat trainer similar to the Scheibe Specht. It first flew in 1955. It features a steel-tube, fabric-covered fuselage, a wooden fabric-covered wing with top-surface spoilers, a fixed wheel and nose skid, and tandem seating.
The ASK-13 was the next glider I saw from close up, but this time I had the opportunity to handle the controls. This occurred some 30 years later, in the mid 1980s, when I had three or four flights on two group flying evenings organised by John Williams and Frank Prime. These were at the Cambridge Gliding Club while it was still operating from Duxford.
The ASK-13 two-place tandem trainer was a development of the earlier Ka-7. The performance improvement was marginal, but the mid-wing design and improved canopy made for much better pilot visibility. The landing wheel is fixed and sprung with rubber cones, and the aircraft is fitted with airbrakes. In later models, a nosewheel was substituted for the skid. After Schleicher ceased production, the sailplane was license-built by Jubi GmbH of Oerlinghausen, Germany.