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The IS-1 Sęp (Instytucie Szybownictwa – gliding institute) was a single-seat high-performance glider designed and built in Poland from 1947.

Made by Jeżów Glider Workshop.

Empty Weight Lb
609
Stall Speed Mph
31
Designer
Joseph Niespał
Wladyslaw Nowakowski
Wladyslaw Nowakowski and Joseph Niespał
Span Ft
57
Max Speed Mph
134
Aspect Ratio
18
Wing Profile
Göttingen 549
M12
Glide Ratio
27
Span In
5
Wing Area Sqm
17
Gross Weight Lb
778
Sink Rate Ms
1
Number Built
6
Crew
1
Empty Weight Kg
276
Gross Weight Kg
353
Min Sink Speed Mph
42
Height In
1
Stall Speed Kts
27
Sink Rate Ftmin
134
Manufacturer
Jeżów Glider Workshop
Max Speed Kts
122
First Flight
2
Max Speed Kmh
225
Height Ft
4
Origin
Poland
Min Sink Speed Kts
36
National Origin
Poland
Wing Area Sqft
183
Met Or Eng
met
Min Sink Speed Km/h
67
Span M
18
Length Ft
24
Variants With Their Own Articles
-
Height M
1
Similar Aircraft
*Slingsby Type 34 Sky*DFS Weihe
Stall Speed Kmh
50
Length In
7
Length M
8
Category
Polish sailplanes 1940-1949
Sailplanes

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