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Douglas C-47 Skytrain


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The Douglas C-47 Skytrain or Dakota is a military transport aircraft that was developed from the Douglas DC-3 airliner. It was used extensively by the Allies during World War II and remained in front line operations through the 1950s with a few remaining in operation to this day.

Design and development

The C-47 differed from the civilian DC-3 in being fitted with a cargo door and strengthened floor.

During World War II, the armed forces of many countries used the C-47 and modified DC-3s for the transport of troops, cargo and wounded. The US Naval designation was R4D. Over 10,000 aircraft were produced in Long Beach and Santa Monica, California and Oklahoma City, Oklahoma . The Oklahoma City plant produced 5,354 C-47s from March 1943 until August 1945.

Super DC-3 (R4D-8)

In response to proposed changes to the airworthiness requirements that would limit the continuing use of the large numbers of DC-3s and surplus C-47s in commercial use in the United States, Douglas offered a late 1940s conversion of the DC-3 modified to improve takeoff and single-engined performance to meet the new Civil Air Regulations , and with increased speed to compete with newer airliners. The new model, the DC-3S or "Super DC-3", was 39 in (0.99 m) longer, allowing 30 passengers to be carried. It also had larger tail surfaces and new outer wings with a greater sweep back at the trailing edge to accommodate a rearward shift in the center of gravity. More powerful engines, either 1,475 hp (1,100 kW) Wright R-1820 Cyclones or 2,000 hp (1,490 kW) Pratt & Whitney R-2000 s incorporated into larger engine nacelles, were installed along with shorter, jet ejection-type exhaust stacks. Minor changes included wheel well doors and a partially retractable tail wheel along with flush rivets and low drag antennas, that all contributed to a top speed of 250 mph. With over 75% of the original DC-3/C-47 configuration changed, the modified design ended up virtually as a new aircraft. The first DC-3S made its maiden flight on 23 June 1949.

Although the changes fully met the new FAR 4B airworthiness requirements, and significantly improved performance, there was little interest from commercial operators in the DC-3S, which was too-expensive for the smaller operators who were its main target, with only three being sold to Capital Airlines . The US Navy, however, had 100 of its R4D aircraft modified to Super DC-3 standard as the R4D-8, these later being redesignated C-117D.

Operational history

The C-47 was vital to the success of many Allied campaigns, in particular those at Guadalcanal and in the jungles of New Guinea and Burma where the C-47 (and its naval version, the R4D) made it possible for Allied troops to counter the mobility of the light-traveling Japanese army. Additionally, C-47s were used to airlift supplies to the embattled American forces during the Battle of Bastogne . But possibly its most influential role in military aviation was flying "The Hump " from India into China . The expertise gained flying "The Hump " would later be used in the Berlin Airlift , in which the C-47 would play a major role, until being replaced by the C-54 .

In Europe, the C-47 and a specialized paratroop variant, the C-53 Skytrooper, were used in vast numbers in the later stages of the war, particularly to tow glider s and drop paratroops. In the Pacific , with careful use of the island landing strips of the Pacific Ocean, C-47s were even used for ferrying soldiers serving in the Pacific theater back to the United States.

C-47s in British and Commonwealth service took the name Dakota, from the acronym "DACoTA" for ''Douglas Aircraft Company Transport Aircraft''. The C-47 also earned the informal nickname ''Gooney Bird '' in the European theater of operations.

The USAF Strategic Air Command had C-47 Skytrains in service from 1946 through 1967.

The Pakistan Air Force used C-47 Dakota cargo planes which it used to transport supplies to the Pakistan Army soldiers fighting in the Indo-Pakistan War of 1947 against India.

Several C-47 variations were used in the Vietnam War by the United States Air Force, including three advanced electronic warfare variations which were sometimes called "Electric Gooneys" designated EC-47N, EC-47P, or EC-47Qs depending on the engine used. EC-47s were also operated by the Vietnamese, Laotian and Cambodian Air Forces. A gunship variation, utilizing three 7.62mm miniguns, designated AC-47 "Spooky" often nicknamed "Puff the Magic Dragon" was also deployed.

The Royal Canadian Air Force and later, the Canadian Air Force employed the C-47 for transportation, navigation and radar training, and search & rescue operations from the 1940s to the 1980s.

After World War II thousands of surplus C-47s were converted to civil airline use, some remaining in operation in 2010.

Accidents and incidents

Variants

C-47

Initial military version of the DC-3 with seats for 27 troops, 965 built including 12 to the United States Navy as R4D-1,;;C-47A:C-47 with a 24-volt electrical system, 5,254 built including USN aircraft designated R4D-5.;;RC-47AC-47A equipped for photographic reconnaissance and ELINT missions.;;SC-47AC-47A equipped for Search Air Rescue; redesignated HC-47A in 1962.;;VC-47A:C-47A equipped for VIP transport role.;;C-47B:Powered by R-1830-90 engines with superchargers and extra fuel capacity to cover the China -Burma -India routes, 3,364 built.;;VC-47B:C-47B equipped for VIP transport role.;;XC-47C:C-47 tested with Edo Model 78 floats for possible use as a seaplane.;;C-47DC-47B with superchargers removed after the war.;;AC-47D

Gunship aircraft with three side-firing .30 in (7.62 mm) Minigun machine guns.;;EC-47D:C-47D with equipment for the Airborne Early Warning role; prior to 1962 was designated AC-47D.;;NC-47D:C-47D modified for test roles;;RC-47D:C-47D equipped for photographic reconnaissance and ELINT missions.;;SC-47D:C-47D equipped for Search Air Rescue; redesignated HC-47D in 1962.;;VC-47D:C-47D equipped for VIP transport role.;;C-47EModified cargo variant with space for 27–28 passengers or 18–24 litters.;;C-47F:YC-129 re-designated, Super DC-3 prototype for evaluation by USAF later passed to USN as XR4D-8.;;C-47L/M:C-47H/Js equipped for the support of American Legation United States Naval Attache (ALUSNA) and Military Assistance Advisory Group (MAAG) missions.;;EC-47N/P/Q:C-47A and D aircraft modified for ELINT/ARDF mission. N and P differ in radio bands covered, while Q replaces analog equipment found on the N and P with a digital suite, redesigned antenna equipment and uprated engines.;;C-47R:One C-47M modified for high altitude work, specifically for missions in Ecuador.;;C-47T:Designation applied to aircraft modified to a Basler BT-67 standard.;;C-47TP Turbo Dakota:Refit with modern turboprop engines and fuselage stretch for the South African Air Force .

C-53 Skytrooper

Troop transport version of the C-47.;;XC-53A Skytrooper:One aircraft with full-span slotted flaps and hot-air leading edge deicing.;;C-53B Skytrooper:Winterised version of C-53 with extra fuel capacity and separate navigator's station, eight built.;;C-53C Skytrooper:C-53 with larger port-side door, 17 built.;;C-53D Skytrooper:C-53C with 24V DC electrical system, 159 built.

C-117A Skytrooper

C-47B with 24-seat airline-type interior for staff transport use, 16 built.;;VC-117A:Three redesignated C-117s used in the VIP role.;;SC-117A:One C-117C converted for air-sea rescue.;;C-117B/VC-117B:High-altitude superchargers removed, one built and conversions from C-117As all later VC-117B;;C-117D:USN/USMC R4D-8 redesignated;;LC-117D:USN/USMC R4D-8L redesignated;;TC-117D:USN/USMC R4D-8T redesignated;;VC-117D:USN R4D-8Z redesignated

YC-129

Super DC-3 prototype for evaluation by USAF redesignated C-47F and later passed to USN as XR4D-8.

XCG-17

One C-47 tested as a 40-seat troop glider with engines removed and faired over.

R4D-1 Skytrain

USN/USMC version of the C-47.;;R4D-3:Twenty C-53Cs transferred to USN.;;R4D-5:C-47A variant 24-volt electrical system replacing the 12-volt of the C-47; redesignated C-47H in 1962, 238 transferred from USAF.;;R4D-5L:R4D-5 for use in Antarctica. Redesignated LC-47H in 1962.;;R4D-5Q:R4D-5 for use as special ECM trainer. Redesignated EC-47H in 1962.;;R4D-5R:R4D-5 for use as a personnel transport for 21 passengers and as a trainer aircraft; redesignated TC-47H in 1962.;;R4D-5S:R4D-5 for use as a special ASW trainer; redesignated SC-47H in 1962.;;R4D-5Z:R4D-5 for use as a VIP transport; redesignated VC-47H in 1962.;;R4D-6:157 C-47Bs transferred to USN; redesignated C-47J in 1962.;;R4D-6L, Q, R, S, and Z:Variants as the R4D-5 series; redesignated LC-47J, EC-47J, TC-47J, SC-47J, and VC-47J respectively in 1962.;;R4D-7:44 TC-47Bs transferred from USAF for use as a navigational trainer; redesignated TC-47K in 1962.

;;R4D-8:R4D-5 and R4D-6 aircraft fitted with modified wings and re-designed tail surfaces; redesignated C-117D in 1962.;;R4D-8L:R4D-8 converted for Antarctic use, redesignated LC-117D in 1962.;;R4D-8T:R4D-8 converted as crew trainers, redesignated TC-117D in 1962.;;R4D-8Z:R4D-8 converted as a staff transport, redesignated VC-117D in 1962.

Dakota I

RAF designation for the C-47 and R4D-1

Dakota III

RAF designation for the C-47A.

Dakota IV

RAF designation for the C-47B.;Basler BT-67

Twin turboprop conversions of C-47 aircraft.

Operators