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Description
| Manufacturer: | Sikorsky | |
| Base model: | R-4 | |
| Designation: | R-4 | |
| Version: | B | |
| Nickname: | Hoverfly | |
| Designation System: | U.S. Air Force | |
| Designation Period: | 1941-1947 | |
| Basic role: | Rotary Wing (Helicopter) | |
| See Also: | ||
| Serial/Bureau Number: | 43-46506 | |
| Location: | United States Air Force Museum, Wright-Patterson Ohio | |
Specifications
| Length: | 33' 7" | 10.2 m | |
| Height: | 12' 5" | 3.7 m | |
| Wingspan: | 38' | 11.5 m | |
| Gross Weight: | 2,579 lb | 1,170 kg | |
| Max Weight: | 2,581 lb | 1,170 kg | |
Propulsion
| No. of Engines: | 1 | ||
| Powerplant: | Warner R-550 | ||
| Horsepower (each): | 200 | ||
Performance
| Range: | 130 miles | 209 km | |
| Cruise Speed: | 65 mph | 104 km/h | 56 kt |
| Max Speed: | 75 mph | 120 km/h | 64 kt |
| Ceiling: | 8,000 ft | 2,438 m | |