TH-57 Sea Ranger
The TH-57 Sea Ranger is a derivative of the commercial Bell Jet Ranger 206. Although primarily used for training, these aircraft are also used for photo, chase and utility missions.
The JetRanger was initially designed to compete in a U.S. Army light observation helicopter competition. Bell lost that competition but the 206 was commercially successful. The TH-57 Sea Ranger provides advanced instrument flight rules (IFR) training to several hundred aviation students a year at Naval Air Station Whiting Field in Milton, Florida. TH-57 sundown will begin in fiscal 2022, and concludes in the fiscal 2024 timeframe. It's replacement is the TH-73A.
Contractor: Bell Helicopter Textron
Date Deployed: First flight: 1961; Operational: 1968
Propulsion: One Allison 250-C20BJ turbofan engine
Length: Fuselage - 31 feet (9.44 meters); Rotors turning - 39 feet (11.9 meters)
Height: 10 feet (3.04 meters)
Rotor Diameter: 35 feet 4 inches (10.78 meters)
Weight: 1595 pounds (725kg) empty, 3200 pounds (1455 kg) maximum take off
Airspeed: 138 miles (222 km) per hour maximum; 117 miles (188 km) per hour cruising
Ceiling: 18,900 feet (5,761 meters)
Range: 368 nautical miles (420 statute miles, 676 km)
Crew: One pilot, four students