Schleicher ASK 14
The ASK 14 is a single-seat motor glider with built motor Alexander Schleicher.
History
The ASK 14 was designed by Rudolf Kaiser in the effort to construct a self-launching glider, the real Streckensegelflug possible, despite the additional engine weight. As a basis which is also constructed by him Ka 6E was used, which is considered one of the most powerful and most sophisticated pattern of Holzbauära. With a glide ratio of 28 and a minimum sink rate of 0.75 m / s to him this objective has been achieved. Services they have been achieved not nearly of the available competition patterns such as the RF 3 or motor Sparrow ( glide ratio, respectively 20).
How well the ASK 14 is adapted for gliding, shows the fact that the motor operating time of the Emperor 's own ASK 14 at just lay 2% of the total operating time. Due to these properties, the ASK 14 is still a popular pattern, over 50 of the originally produced about 66 copies fly today, many even with the original engine.
Construction
Because the salable quantity could only be assessed very carefully, the wings had closely related to those of the Ka to be 6, so have a profile of the NACA 63 series. Since the induced by the motor mounting higher body weight would have resulted in an unchanged span to a higher bending load on the wing Holmes, the wingspan of the in Ka 6 then offered 15 meters (earlier versions has had only 14.4 m and the very first even only 14.0 m) reduced to 14.30 meters. Despite that inevitably reduced stretching, the best glide ratio decreased compared to Ka 6 CR 30 only to nearly 28, with well- helped the increased surface load.
As a Hirth engine, four-cylinder two-stroke engine was chosen with 19 kW of power, which is operated with a 1:20 fuel -oil mixture. Despite the low power appearing requires a ASK 14 is only about 100 meters off run.
The fairing of the engine, each with a semi- drop-shaped bulge from the other Rumpfstrak from the right and left side was obviously aerodynamically well done, what eingrenzte the fundamental disadvantage not retractable engines for the coasting mode into Bearable together with the Feathered to be brought propeller.
Compared to modern constructions of this pilot designed as low-wing aircraft sat further back, about to the wing leading edge. The semi- drop-shaped patch hood had a good view even to the rear, similar to the view from the Hütter H 30 levels and the resulting dragonfly types of manufacturer glass wings.
Use
Due to the basic parameters of the construction can be assumed that the ASK 14 with their polars, despite the virtually matching glide ratio could not be flown with the Ka 8 together harmoniously in the association, could be rather quickly and had to. The ASK 14 2010 Rating speeds of up to 92 km / h were achieved in the gliding league, so even teams were made with much more modern designs such as the ASH 25 Mi and Duo Discus to the places.