Schleicher Ka-2b Rhönschwalbe Short Kit or Plan

//Schleicher Ka-2b Rhönschwalbe Short Kit or Plan

Schleicher Ka-2b Rhönschwalbe Short Kit or Plan

£25.00£170.00

The Schleicher Ka-2b Rhönschwalbe Model Glider

Cliff Charlsworth writes……..

“The Ka-2b was my last large project and was a mind blowing job. I managed to borrow all the full size drawings which took a lot of study and time to reduce to 1/4 scale. The method of construction is similar to that of my Olympia 2b and Ka-6e projects, with the fuselage being skinned using .04mm ply.”

As far as we are aware, this is the only available plan and short kit for this aircraft. The model glider has been designed for radio control and as with all of Cliff’s projects, flies extremely well.

SKU: LCS-CC-Ka-2-Rhönschwalbe-short-kit-plan Category:

Description

Schleicher Ka-2 Rhönschwalbe Glider

Designed by Rudolf Kaiser, the Ka-2 was an all wooden glider with plywood and aircraft fabric covering. The Ka-2s wings, with marked forward sweep and dihedral are mounted above the fuselage, flanking the rear cockpit. The front cockpit is covered by a one piece plexiglas canopy which opens to the right and the rear cockpit is covered by a canopy incorporating the inner leading edges of the wing, opening rear-wards, held in place by the front canopy when closed.

The undercarriage of the Ka-2 comprises a large rubber-sprung wooden skid under the forward fuselage in front of a non-retractable semi recessed mainwheel, as well as a steel rubber-sprung tail-skid. Conventional controls are fitted with ailerons on each wingtip trailing edge, elevator with anti-balance trim tab behind the tailplane and rudder aft of the fin. Schempp-Hirth airbrakes, at 38% chord and approx ⅓ span, open out above and below the wing to provide approach control.

Performance of the Ka-2 was found to be lower than expected, due to the relatively high wing loading. Schleicher introduced the Ka2b, increasing the wingspan from 15 m (49 ft) to 16 m (52 ft), to improve the efficiency of the wing. Fuselage length was also increased by 18 cm (7.1 in) to 8.15 m (26.7 ft) to maintain stability margins in pitch.

Performance of the Ka-2b was improved in weak thermals due to a lower minimum sink speed, allowing tighter thermalling. Cross-country performance was also improved by a higher glide ratio, increasing the chance of reaching the next thermal. The standard competition handicap for the Ka–2 is 74 and the Ka-2b handicap is 78.

Operational History

The Ka-2 and Ka-2b saw extensive use in gliding clubs throughout Germany and Europe and the Ka2b was also used in several record attempts; On 24 January 1959 Dieter Schmitt and Karl Pummer climbed a Ka-2b 6,907 m (22,661 ft) in lee wave lift at Fayence in France for a new German National two-seater record climb. Later the same day flying to 7,700 m (25,300 ft) to set a new German two-seater absolute altitude record.

A Ka2b also set a distance record for two seaters in Germany of 424.5 km (263.8 mi; 229.2 nmi) in 1964 and again on 28 May 2012 at 684 km (425 mi; 369 nmi), flown by Uli Schwenk and his 81-year-old father.

Variants

Ka-2. The initial production glider with a 15 m (49 ft) span wing and 7.97 m (26.1 ft) long fuselage.
Ka-2b. An improved performance version with 16 m (52 ft) span wings and 8.15 m (26.7 ft) fuselage.

General characteristics

Crew: 2
Length: 7.97 m (26 ft 2 in)

Ka-2b: 8.15 m (26.7 ft)
Wingspan: 15 m (49 ft 3 in)
Ka-2b: 16 m (52 ft)
Height: 1.7 m (5 ft 7 in)
Wing area: 16.8 m2 (181 sq ft)

Ka-2b: 17.5 m2 (188 sq ft)
Aspect ratio: 13.4
Ka-2b: 14.63

Airfoil: Wing root: Göttingen 533 modified 16%, Mid span: Göttingen 533 14%, Wing tip: Göttingen 533 12%
Empty weight: 254 kg (560 lb)
Gross weight: 460 kg (1,014 lb)
Ka-2b: 480 kg (1,060 lb)

Performance

Stall speed: 58.5 km/h (36 mph; 32 kn)
Never exceed speed: 170 km/h (106 mph; 92 kn) in smooth air
Rough air speed max: 130 km/h (81 mph; 70 kn)
Aerotow speed: 130 km/h (81 mph; 70 kn)
Winch launch speed: 100 km/h (62 mph; 54 kn)
g limits: +4g at 126 km/h (78 mph; 68 kn), -2g at 168 km/h (104 mph; 91 kn)
Rate of sink: 0.9 m/s (180 ft/min) at 65 km/h (40 mph; 35 kn) at 415 kg (915 lb)

Ka-2b: 0.8 m/s (160 ft/min) at 62 km/h (39 mph; 33 kn) at 415 kg (915 lb)
Lift-to-drag: 26:1 at 80 km/h (50 mph; 43 kn) at 415 kg (915 lb)
Ka-2b:27:1
Wing loading: 27.4 kg/m2 (5.6 lb/sq ft) at 460 kg (1,010 lb)
Ka-2b: 27.4 kg/cm² (5.62 lb/sqft) at 480 kg (1,060 lb)