Arup S-4
Arup Manufacturing Corporation · United States · first flew 1935 · light aircraft
The Arup S-4 (Model 104) was the last in a series of round-wing aircraft from C.L. Snyder, built by the Arup Manufacturing Corporation.
Recognition (WEFT)
| W — Wings | Mid-mounted, elliptical |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | Small rudder with an elevator attached on the rear of the fuselage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Low aspect ratio, semi-circular planform wing
- Small rudder with an elevator attached on the rear of the fuselage
- Entered through a door on the underside of the aircraft
A round, semi-circular wing with a conventional landing gear and a small rudder and elevator at the rear. A replica is on display at South Bend International Airport.
Specifications
- The Arup S-4 has a length of 5.64 m (19 ft).
- It has a wingspan of 6.7 m (22 ft).
- Its maximum speed is 185 km/h (115 mph).
- Typical crew: 1-2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
It was developed from the Arup S-3 and engineered by Raoul Hoffman, and first flew on 19 March 1935. The test pilot was Glenn Doolittle, a cousin of Jimmy Doolittle.
Variants
The Hoffman Flying Wing was a design based on the S-4, and the Milt Hatfield Little Bird was a similar design.
Where you'll see it
The S-4 prototype flew extensively in promotional demonstrations, carrying Sears Roebuck and Company logos. It was scrapped for war materials in World War II.
Related aircraft
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