DC-6 (civilian version)
R6D-1 (early US Navy designation)
1944 - 1946
1946 - 1958 (civilian and military production)
United States - Douglas
704 including both civilian and military production
- UNIT COST
Rugged and reliable
Limited production costs
Good speed and range
Low cargo capacity
The C-118 Liftmaster is an early Cold War era transport aircraft of US origin. Development started in 1944 as US forces requested a more capable version of the C-54 Skymaster. As World War 2 ended no military orders were placed but civilian production started in 1946 under the name DC-6. In the early 1950's military interest was renewed and many C-118 served well into the 1960's.
The C-118 is based on the earlier C-54 but has been improved in various areas. The C-118 is larger, has a pressurized cabin and uses more powerful and economic engines. The layout remains conventional with four Pratt & Whitney radial engines on the non-swept low mounted wings and a relatively thin body.
The C-118 military transport is based on the DC-6A freighter and has a large cargo door. It may carry 12 t of cargo or 60 combat troops. The civilian DC-6B has also been acquired by various militaries. The DC-6B is a passenger aircraft which seats between 54 and 102 passengers depending on seating configuration.
The four Pratt & Whitney R-2800-CB-17 "Double Wasp" radial engines deliver 2.500 hp each. The maximum and cruise speed are 580 and 507 km/h respectively. The range is 4.800 km and the service ceiling is 7.6 km.
The main military users were the United States air force and navy. The C-118 and DC-6 were exported all over the world, but were most common in Europe and South America. Since the 1960's most have been replaced by other military and civilian transport aicraft, although in foreign service some were used well into the 1980's.
C-118A: US Air Force model of DC-6A with the more powerful engines later used on the DC-6B .
C-118B: US Navy model of C-118A. Was called the R6D-1 before 1962.
VC-118B: Four US Navy C-118B were converted to staff transports. Was called the R6D-1Z before 1962.
DC-6: Initial civilian passenger variant.
DC-6A: Civilian freight variant with cargo door and longer fuselage.
DC-6B: Passenger variant based on longer DC-6A airframe and more powerful engines.
DC-6C: Convertible cargo/passenger variant.
|Crew||3 + 54 to 102 (pilot, copilot, flight engineer, 54 to 102 passengers)|
|Width||35.81 m wingspan|
|Weight||25.1 t empty, 48.5 t MTOW|
|Powerplant||4x Pratt & Whitney R-2800-CB-17 Double Wasp radial engine, 2.500 hp each|
|Speed||578 km/h maximum, 507 km/h cruise speed at altitude, 435 km/h cruise speed at 6 km altitude|
|Range||4.300 km with maximum fuel, 3.058 km with maximum payload|
|Fuel||up to 14.9 t|
|Climb rate||5.4 m/s|
|Landing gear||Retractable tricycle|
|Cargo||54 to 102 passengers, limited cargo, maximum payload 11.1 t|
|Remarks||1.875 m take-off run, 1.525 m landing run|