Flying Lab SL-2 1968.

It is believed to have been designed originally by Balys Karvyalis and first flown, under the designation BK-7, in 1972. It had a Wortmann FX-67-K-170 wing section and a retractable monowheel landing gear, with tailskid. The BK-7, which was of glassfibre construction, was subsequently reported to have entered series production and a Polish journal later referred to a ‘BK-7A Lietuva’ with a wing span of 20 m (65 ft 7.5 in), length of 7.27 m (23 ft 10.25 in), weight of 380 kg (837 lb), best glide ratio of 46 and max speed of 210 km/hr (113 kt).

An almost identical aircraft was flown by O. Pasetnik in the Open Class of the June 1976 World Championships in Finland but withdrew from the last two days of the competition because of aileron damage. This aircraft was referred to as the LAK-9 Lietuva and it was reported that the three LAK-9s then built had not, at that time, fully completed flight testing. The LAK-9 is the first Soviet sailplane to compete in the World Championships since 1968.

LAK-9 Lietuva
Wing span: 20.02 m / 65 ft 8 in
Length: 7.27 m / 23 ft 10.25 in
Height: 1.53 m / 5 ft 0 in
Wing area: 14.99 sq.m / 161.4 sq ft
Wing section: Wortmann FX-67-K-170
Aspect ratio: 26.8
Empty weight: 380 kg / 838 lb
Max weight 580 kg / 1,278 lb
Water ballast: 100 kg / 220 lb
Max wing loading: 38.69 kg/sq.m / 7.92 lb/sq ft
Max speed: 121 kt / 225 km/h
Stalling speed: 35 kt / 64 km/h
Min sinking speed: 0.51 m/sec / 1.67 ft/sec at 40 kt / 74 km/h
Max rough air speed: 113 kt / 210 km/h
Best glide ratio: 48 at 55.5 kt / 103 km/h

The Kazan Aviation Institute at Kazan designed and produced the KAI-14 high performance Standard Class single seater. Designed by a team headed by M. P.Simonov; of all-metal construction it made its first flight in about 1962, and two KAI-14s were entered in the 1965 World Championships held at South Cerney in England.

Two versions of the type have been produced, the first being for competition flying with the pilot seated in a reclining position under a long flush-fitting one-piece transparent canopy; this version has a polished metal finish to reduce drag.

The second version, intended for series production, is similar except that the pilot sits upright in a conventional seat under a raised cockpit canopy, and is unpolished. Both versions are otherwise the same, with cantilever shoulder wings with a forward sweep of 2° at the leading edges and compound taper on the trailing edges; the inset ailerons are each in two sections and small trailing edge air brakes are featured. The wings are metal-covered as is the semi-monocoque fuselage, in which the forward section tapers to a slimmer rear half carrying the all-metal cantilever ‘butterfly’-type V-tail. The landing gear consists of a non-retractable monowheel faired into the bottom of the fuselage, with a brake that is linked to the air brakes, and a tail bumper.

KAI-14
Span: 49 ft 2.5 in / 15.0 m
Length: 19 ft 1 in / 5.82 m
Wing area: 107.7 sq.ft / 10.0 sq.m
Aspect ratio: 22.5
Max weight: 573 lb / 260 kg
Water ballast: None
Max wing loading: 26.0 kg/sq.m / 5.32 lb/sq ft
Max permissible diving speed: 155 mph / 135 kt / 250 km/h
Max aero-tow speed: 87 mph
Landing speed: 43.5 kt / 80 km/h
Min sinking speed: 1.90 ft/sec / 0.58 m/sec at 56 mph / 48.5 kt / 90 km/h

The Primorec is a 1957, all-metal trainer glider derived from the Czech LF109 Pinoyr.

Length: 25.591 ft / 7.8 m
Height: 7.874 ft / 2.4 m
Wingspan: 43.963 ft / 13.4 m
Max take off weight: 954.8 lb / 433.0 kg
Max. speed: 39 kt / 72 km/h
Glide ratio: 18.0
Crew: 2