M.Hardy. Gliders & Sailplanes of the world

SZD-25 Lis

  This high performance single-seater combines the wings of the SZD-22 Mucha Standard with a metal fuselage developed from that of the SZD-16 Gil prototype. Designed for large scale production, with low manufacturing and maintenance ДальшеMore>>> costs, the Lis (or Fox) made its first flight as a prototype on 5 March 1960, and production aircraft began to enter service with the Polish gliding clubs early in 1962; not a great many were built, but several were exported. Slotted ailerons are fitted, instead of the SZD-22's Frise-type ones, and these are aerodynamically and mass balanced, and air brakes are also fitted. The all-metal fuselage is built in two portions: the welded steel tube forward part with fabric covering and the tail boom of riveted sheet duralumin, the cantilever all-wood tail unit being fabric-covered. Landing gear consists of a semi-retractable sprung monowheel with brake and a rubber-mounted nose skid. The pilot sits under a sideways-hinging canopy.


Span: 49 ft 2 in
Length: 23 ft 0 in
Height: 5 ft 0 in
Wing area: 137.24 sqft
Aspect ratio: 17.65
Empty weight: 452 lb
Max weight: 695 lb
Max speed: 143 mph (in smooth air)
Min sinking speed: 2.5 ft/sec at 43 mph
Best glide ratio: 27:1 at 47 mph