Stargazer is quite right of course, sorry for the muddle, which happens, when two are tinkering
on the same thing !
So, as one of the guilty ones, as atonement I'll start with listing the Slingsby designations, based mainly on
Martin Simons "Slingsby Sailplanes"
Type 1 "British Falcon", 1931, licensed copy of the A. Lippisch "Falke"
Type 2 "British Falcon 2", 1933, licensed copy of the A. Lippisch "Falke"
Type 3 "Dagling", 1933, licensed copy of the RFD "Dagling"
Type 4 "Falcon 3", 1935, twin seat training glider
Type 5 "Grunau Baby 2", 1935, license Built Grunau "Baby"
"Hjordis", 1935, competition Glider
Type 6 "Kirby Kite", 1935, single seat training glider
Type 7 "Kirby Kadet" (Cadet TX Mk.1), 1936, single seat training glider
Type 8 "Kirby Tutor" (Cadet TX Mk.2), 1938, single seat training glider
Type 9 "King Kite", 1937, single seat competition Glider
Type 12 "Kirby Gull", 1938, single seat competition Glider
Type 13 "Petrel", 1938, single seat competition Glider
Type 14 "Gull 2", 1939, twin seat training/competition glider
Type 15 "Kirby Gull III", 1945, single seat competition Glider
Type 16, 1939, single seat training/competition glider
Type 17, 8-seat attack glider, pre-project to Type 18
Type 18 "Hengist", 1942, 15-seat attack glider, 3 prototypes built
Type 19, 1943, target glider, 6 built
Type 20, 1944, twin seat training glider, 1 built
Type 21 "Sedbergh", 1947 twin seat training glider, 129 built
Type 21B, 1948, twin seat training glider, 157 built
Type 22 "Petrel 2", 1947, single seat competition Glider
Type 23 "Kirby Kite 1A", 1945, single seat training glider, develoopment of Type 6
Type 24 "Falcon 4" (TX.8/45), 1946 twin seat training glider, 3 built
Type 25 "Gull 4", 1948, single seat competition Glider
Type 26 "Kite 2", 1948, single seat competition Glider
Type 27, 1938, experimental twin fuselage using two Type 8
Type 29 "Motor Tutor", 1947, motor glider using the Type 8 wing, 2 built
Type 30 "Prefect", 1948, single seat training glider, 43 built
Type 31 "Tandem Tutor" (TX Mk.3 Cadet), 1950. twin seat training glider, more than 200 built
Type 34 "Sky", 1950, single seat competition Glider, 16 built
Type 35 "Austral" , 1950. modification of Type 31, 1 built
Type 37 "Skylark 1", 1953, laminar flow test glider, 2 built
Type 38 "Grasshopper", 1952, elementary traing Glider, copy of SG 38, 16 built
Type 39, 1952, towed target
Type 41 "Skylark 2", 1953, single seat competition Glider, 37 built
Type 42 "Eagle", 1954, twin seat training glider, 17 built
Type 43 "Skylark 3", 1955, single seat competition Glider
Type 44 "Stratoferic", 1955, project for a high-flying twin-seat experimantal glider with pressure cabin
Type 45 "Swallow", 1957, single seat competition Glider, 106 built
Type 46/Type 21C, 1958, twin seat training glider, 1 built, modification of Type 21
Type 47 , 1958, project for a single seat competition Glider, modification of Type 43
Type 49 "Capstan", 1961, twin seat training glider, 32 built,
Type 49C, 1968, powered T-49, 1 built,
Type 50 "Skylark 4", 1961, single seat competition Glider,
Type 51 "Dart 15/17", 1963, single seat competition Glider, 15m/17m span
Type 52, 1965, project for full-metal single seat training Glider
Type 53 "Phoenix", 1967, full-metal twin seat training Glider
Type 54, 1966, project for full-metal twin seat motor Glider
Type 55 "Eagle 4/Regal Eagle", 1957, twin seat training glider, single modification of Type 42
Type 59 "Kestrel", 1970, full plastic single seat competition Glider, license built Glasflügel 401
Type 61 "Venture", 1961, license built Scheibe SF-25 Falke
Type 66 "Nipper", 1966, licensed built Tipsy Nipper
Type 67 "Firefly", 1981, licensed built Fournier RF-8, basic training aircraft
Slingsby-Schreder HP-14, 1967, single seat competition Glider,
Slingsby-Baynes Bat, 1942, test aircraft for the Carríer Wing Concept
Vickers-Slingsby T-65 "Vega", 1977, single seat competition Glider, ,fibreglass construction