Grumman WF / E-1 Tracer
Grumman E-1B Tracer
An AEW development of the S-2 Tracker the E-1 Tracer was designated WF under the old US Navy system. The Tracer was fitted with the Hazeltine AN/APS-82 search radar in its radome. The radar featured an Airborne Moving Target Indicator (AMTI), which analyzes the Doppler shift in reflected radar energy to distinguish a flying aircraft against the clutter produced by wave action at the ocean's surface. Separating a moving object from stationary background is accomplished by suitable hardware.
The E-1 featured folding wings for compact storage aboard aircraft carriers. Unlike the S-2 and C-1 in which the wings folded upwards, the radome atop the fuselage necessitated the E-1 to fold its wings along the sides of the fuselage.
Aerodynamic prototype (BuNo 136792) without electronics, later rebuilt as a standard C-1A, retaining the twin tail.
Airborne Early Warning version of the TF-1 Trader, redesignated E-1B in 1962, 88 built.
WF-2 redesignated in 1962.
Engines: 2 × Wright R-1820-82A Cyclone 9-cylinder radial, 1,525 hp (1,137 kW)
Length: 45 ft 4 in (13.82 m)
Wingspan: 72 ft 4 in (22.05 m)
Height: 16 ft 10 in (5.13 m)
Wing area: 506 sq ft (47.0 sq.m)
Empty weight: 20,638 lb (9,381 kg)
Loaded weight: 24,800 lb (11,273 kg)
Max takeoff weight: 26,600 lb (12,091 kg)
Maximum speed: 207 knots (238 mph, 383 km/h) at 4,000 ft (1,220 ft)
Cruise speed: 142 knots (163 mph, 263 km/h)
Service ceiling: 15,800 ft (4,800 m)
Rate of climb: 1,120 ft/min (5.7 m/s) at sea level
Range: 900 nmi (1,035 mi, 1,666 km)
Endurance: 6.83 hrs (4.63 hrs on station at 150 nm (278 km) at 5,000 ft (1,500 m)
Crew: 4, two pilots, two RADAR/Intercept Controllers