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Arctic S1B2 Interstate / Tern

A successor to the L6 Grasshopper of WW2, the S.1 BE is a strut-braced high-wing monoplane known as the Arctic Tern, a developed version of the Interstate S.1A, first flown in the 1950s.

Interstate S1B2 Tern
Engine: Lycoming O-320-A2B, 150 hp.
TBO: 2000 hrs.
Prop: McCauley 2-blade, 72-in.
Length: 24 ft.
Height: 7 ft.
Wingspan: 36.8 ft.
Wing area: 186.2 sq.ft.
Maximum takeoff weight: 1850 lbs.
Standard empty weight: 1075 lbs.
Maximum useful load: 775 lbs.
Maximum landing weight: 1850 lbs.
Wing loading: 9.97 lbs/sq.ft.
Power loading: 12.3 lbs/hp.
Maximum usable fuel: 240 lbs.
Best rate of climb: 1275 @ 60 kts.
Climb gradient: 765 ft/nm.
ROC @ 8000 ft: 820 fpm.
Service ceiling: 19,000 ft.
Maximum speed: 103 kts.
Stalling speed clean: 42 kts.
Stalling speed flaps down: 28 kts.
Turbulent-air penetration speed: 105 kts.
Seats: 2.
Fixed tail wheel under carriage.
First built: 1975.

 

 


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