The C-47 converted to electronic warfare for detection of the VC or NVA Major differences include antennas and a nose dome to house equiment. 3 different versions with different engines made
https://en.wikipedia.org/wiki/Douglas_C-47_Skytrainhttp://dc3dakotahistory.org/c-47dakota-military/ec-47/https://www.ec47.com/index.phpVietnam War
Several C-47 variations were used in the Vietnam War by the United States Air Force, including three advanced electronic-warfare variations, which sometimes were called "electric gooneys" designated EC-47N, EC-47P, or EC-47Q depending on the engine used. In addition, HC-47s were used by the 9th Special Operations Squadron to conduct psychological warfare operations over South Vietnam and Laos. Miami Air International, Miami International Airport was a USAF military depot used to convert the commercial DC-3s/C-47s into military use. They came in as commercial aircraft purchased from third-world airlines and were completely stripped, rebuilt, and reconditioned. Long-range fuel tanks were installed, along with upgraded avionics and gun mounts. They left as first-rate military aircraft headed for combat in Vietnam in a variety of missions. [Note 1] EC-47s were also operated by the Vietnamese, Laotian, and Cambodian Air Forces.[14] A gunship variation, using three 7.62 mm miniguns, designated AC-47 "Spooky", often nicknamed "Puff the magic dragon", also was deployed.[11]
General characteristics
Crew: 4 (pilot, co-pilot, navigator, radio operator)
Capacity: 28 troops
Length: 63 ft 9 in (19.43 m)
Wingspan: 95 ft 6 in (29.11 m)
Height: 17 ft 0 in (5.18 m)
Wing area: 987 sq ft (91.7 m2)
Airfoil: root: NACA 2215; tip: NACA 2206[25]
Empty weight: 18,135 lb (8,226 kg)
Gross weight: 26,000 lb (11,793 kg)
Max takeoff weight: 31,000 lb (14,061 kg)
Powerplant: 2 × Pratt & Whitney R-1830-90C Twin Wasp 14-cylinder air-cooled radial piston engines, 1,200 hp (890 kW) each
Propellers: 3-bladed constant-speed propellers
Performance
Maximum speed: 224 mph (360 km/h, 195 kn) at 10,000 ft (3,000 m)
Range: 1,600 mi (2,600 km, 1,400 nmi)
Ferry range: 3,600 mi (5,800 km, 3,100 nmi)
Service ceiling: 26,400 ft (8,000 m)
Time to altitude: 10,000 ft (3,000 m) in 9 minutes 30 seconds
Wing loading: 26.3 lb/sq ft (128 kg/m2)
Power/mass: 0.0926 hp/lb (0.1522 kW/kg)