Schleicher ASK-18 Short Kit or Plan


In stock

ASK-18 glider by Cliff Charlesworth

This 1/4 scale 4m span replica of one of the best and most elegant pre-glass fibre era club single-seat sailplanes by Cliff Charlesworth. Designed for the use of radio control this model glider is a great flier and a well-proven design. It comes on a two sheet plan. Cliff was known for his use of the sandwich method for producing the wing ribs. You do not need to worry as all ribs are now plotted and included in the kit.


The Wing has now been modified to an easy build version Cliff discussed this with me before he passed away, it is just a shame he did not see the finished design.

Designed for radio control up to 5 channels. Aileron, elevator, rudder, airbrakes, and tow release.


Hi Cliff, finally got around to building your redesigned wing for the ASK18. Congratulations on a brilliant design, so easy to build and with excellent laser cut parts. Thanks again for the great service you provide. Brian Taylor

SKU: LCS-CC-ASK-18-Short-Kit-Plan Category:


The Schleicher ASK 18 Glider

Designed by Rudolf Kaiser and was the last Schleicher glider to use the traditional construction method, at a time when contemporary aircraft of the same class, such as the Grob G-102 Astir, were made of glass-fibre. The fuselage was derived from the Ka 8 and used welded steel tube and spruce longerons. It is covered in fabric. The wings are from the Ka 6E but with 16-metre span. They have a single wooden spar. The rear part of the wing is fabric-covered and the ailerons are plywood-covered. The tailplane came from the K 10; the fin and tailplane are plywood-covered and the rudder and elevators are fabric covered. A Flettner trim tab is fitted to the elevator. Only the nose cone is glass-fibre. The main-wheel is fixed and has a brake. There is a tail-skid but no nose-skid. The Schempp-Hirth airbrakes extend above and below the wing. First flight was in October 1974.

A variation was the ASK 18B which had a span reduced to 15m. At the end of production in 1977 38 K18s and 9 K18Bs had been built by Schleicher and one unknown variant built from a kit. A further 8 K18-ARs were produced in Argentina.

General characteristics

Crew: One
Length: 6.00 m (19 ft 8 in)
Wingspan: 16.00 m (52 ft 6 in)
Height: 1.68 m (5 ft 6 in)
Wing area: 13.0 m2 (140 ft2)
Aspect ratio: 19.7
Wing profile: Root: NACA 633-618 Mid: NACA 633-614 (with Wortmann leading edge modification)
Empty weight: 215 kg (473 lb)
Gross weight: 335 kg (737 lb)


Maximum speed: 200 km/h (125 mph)
Maximum glide ratio: 34
Rate of sink: 0.62 m/s (122 ft/min)


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