Douglas DC-4 / C-54 Skymaster

Updated: October 2026 – Four radial engines drone low and unevenly, a silver fuselage with round windows passes by, a nosewheel stands under the nose: if you see an aircraft like that, it is very likely a Douglas DC-4 or its military version, the C-54 Skymaster. In Germany the type is inseparably tied to the Berlin Airlift – as the “Rosinenbomber” (Candy Bomber). Here you learn where the DC-4 comes from, how to reliably tell it from the DC-3, DC-6 and Constellation and where you can still see one today at all.

What is the Douglas DC-4?

The DC-4 is a four-engine propeller airliner from the Douglas Aircraft Company of Santa Monica, California. It was conceived as a successor to the successful Douglas DC-3 for longer routes and more passengers. It is powered by four Pratt & Whitney R-2000 Twin Wasps – air-cooled twin-row radial engines with about 1,450 hp takeoff power each.

The prehistory is somewhat tangled. First came a large prototype, today usually called the DC-4E, which first flew in 1938. It had a triple tail and was too complex and too heavy for the airlines. Douglas drew its lessons and designed a smaller, simpler aircraft with a single vertical stabilizer. What was kept was the nosewheel landing gear – not yet a matter of course for a large airliner of that time.

Before the new DC-4 could go to airlines, the US entered World War II. The entire production went to the military. The first production aircraft flew as the C-54 on February 14, 1942 from Clover Field in Santa Monica. Under the name Skymaster – more on the page about the Douglas C-54 Skymaster – it became the most important long-range transport of the US armed forces; the US Navy designated it R5D. Just over 1,160 aircraft were built for the military, and after the war 79 civil DC-4s followed up to 1947. In total that makes about 1,240 aircraft – none of them with a pressurized cabin.

You find more on the manufacturer and its later merger on the page about McDonnell Douglas. Since 1997 the rights to the Douglas family have belonged to Boeing.

From military transport to airliner

After the end of the war, hundreds of C-54s were available that the military no longer needed. Many airlines grabbed them because a converted C-54 was available sooner than any new build. So in the second half of the 1940s the DC-4 became one of the most important long-range aircraft of all, including on the North Atlantic. Compared with modern jets it seems leisurely: cruising speed was about 365 km/h and range about 5,300 kilometers.

The type also left its mark in German-speaking countries. Swissair took over four brand-new DC-4s, and Balair also used the type. In Germany, used aircraft flew with LTU, the Continentale Deutsche Luftreederei and Transavia Flug, among others. In the US, big network airlines such as United Airlines, American Airlines and Pan Am were among the operators – more on Pan Am’s history in the Pan Am article. Later many aircraft moved on to cargo and charter companies, where they often stayed in service for decades.

From the late 1940s the DC-4 faced competition from within its own company: the Douglas DC-6 was built directly on it, was longer and faster and had a pressurized cabin. The DC-7 continued the line. After that the DC-4 was left mainly with the role of a robust workhorse.

Offshoots: North Star and Carvair

Two offshoots are interesting for connoisseurs:

• Canadair North Star: In Canada a variant was built with four Rolls-Royce Merlin inline engines instead of the radial engines, combined with the nose and landing gear of the DC-6. In total 71 aircraft of the Canadair Four family were built, flying with Trans-Canada Air Lines, the Canadian Air Force and BOAC (as the “Argonaut”), among others. They are recognizable by the pointed Merlin nacelles with individual exhaust stacks.
• Aviation Traders Carvair: A British conversion into a car transporter, first flown on June 21, 1961. The cockpit sits in a hump above the fuselage, and the nose swings open sideways as a loading door. 21 conversions were made, flying with Aer Lingus and British car ferry companies, among others.

The Candy Bomber: the C-54 in the Berlin Airlift

From June 24, 1948, the Soviet Union blockaded all land and water routes to West Berlin. The Western Allies responded with the Berlin Airlift, which ran from June 26, 1948 to September 30, 1949. The whole story is told in our article on the Berlin Airlift.

At first it was mostly the smaller C-47 – the military version of the DC-3 – that carried the load. But the Americans quickly noticed that unloading a C-47 took hardly less time than unloading a C-54, even though the C-54 carried many times more. A C-54 brought about ten tons per flight to Berlin, a C-47 about three and a half. The US Air Force therefore switched to the larger aircraft, and the changeover was complete by the end of September 1948. According to common figures, about 330 DC-4s and C-54s in total took part in the Airlift – the type became the backbone of the operation.

Flights departed in western Germany mainly from Rhein-Main near Frankfurt and Wiesbaden, and destinations in Berlin were Tempelhof, Gatow and Tegel, newly built during the Airlift. In total more than 2.3 million tons of goods reached Berlin this way, almost two thirds of it coal.

The nickname became famous through pilots like Gail Halvorsen, who flew C-47s and C-54s in the Airlift. From July 1948 he dropped candy on tiny parachutes made of handkerchiefs for the children waiting at the fence on approach to Tempelhof. The private action became the official “Operation Little Vittles” – and the transport aircraft became the “Rosinenbomber.” How Tempelhof Airport changed in this time you can read in the history of Tempelhof Airport.

How to recognize a DC-4

Compared with modern airliners, the DC-4 is a very distinctive aircraft. Three observations are enough.

Then there is the nosewheel landing gear: it sets the DC-4 apart immediately from the twin-engine DC-3, which stands with its nose raised on a tailwheel. Look closer and you also see the slender nose without a radar nose and the consistently cylindrical fuselage. As always, the registration provides confirmation – with aircraft this rare it is worth looking up the history of the individual airframe.

Feature	DC-3 / C-47	DC-4 / C-54	DC-6	L-1049 Super Constellation
Engines	2	4	4	4
Landing gear	Tailwheel	Nosewheel	Nosewheel	Nosewheel
Tail	single	single	single	triple
Windows	square	round	square	round
Pressurized cabin	no	no	yes	yes
Length	approx. 19.7 m	28.60 m	longer than DC-4	much longer, curved fuselage

You can also recognize the Super Constellation by its dolphin-shaped curved fuselage; more on the page about the Lockheed L-1049 Super Constellation and in the article about the Lockheed Constellation.

You find more tips on reliably placing vintage aircraft in the sky in the guide Identifying historic aircraft.

Airworthy examples: where the DC-4 still flies today

The honest answer first: airworthy DC-4s and C-54s are extremely rare today. Only a handful of aircraft worldwide still hold a valid registration, and which of them actually flies in a given year depends on maintenance, funding and spare parts. The following operators are known – as of October 2026, check the current information directly with them before any planning.

Example / operator	Country	Status
C-54 “Spirit of Freedom” (N500EJ), Berlin Airlift Historical Foundation	USA	flying Airlift museum, appearances on a schedule
Two DC-4s of the SAA Museum Society (historic South African Airways paint)	South Africa	owned by the museum society, at times used for charter flights
C-54 fleet of Buffalo Airways	Canada	reportedly taken out of service and offered for sale in 2024

The “Spirit of Freedom” is the most emotional example for German aviation fans. The foundation, established in 1988 by Tim Chopp, uses its C-54 as a flying museum and classroom on the Airlift. Today’s “Spirit of Freedom” is a C-54D; it replaced an older C-54 that was damaged by a tornado in 2020. Through its work the foundation has been present over the years in the US and in Europe as well.

In South Africa the two DC-4s (ZS-AUB and ZS-BMH) go back to the Historic Flight originally built up by South African Airways. Between 1994 and 2000 its aircraft could also be seen at airshows in America and Europe. Today the DC-4s belong to the museum society and are leased to an operator for charter flights.

The Canadian Buffalo Airways of the Northwest Territories was for a very long time among the last companies still using C-54s in everyday operations – as freighters and as firefighting aircraft. The company now uses other types for firefighting; according to available reports the C-54s were retired and put up for sale. Whether individual aircraft fly again with new owners is an open question.

Where you see the C-54 in Germany

You will hardly catch a DC-4 flying in Germany. On the ground, though, there is one very good address: the Airlift Memorial at Frankfurt Airport. It lies near the former Rhein-Main Air Base, from which the Airlift was largely flown, and was erected in 1985. Next to the memorial stand a C-47 and a C-54 – so you see both Candy Bomber types right next to each other.

The C-54 on display, with the former military serial number 44-9063, was incidentally not itself part of the Airlift. After the war it flew for Pan Am, from 1952 as HB-ILU with Swissair and then until 1969 with Balair. After some detours it finally ended up in Frankfurt in 1988. You reach the memorial by bike path from Terminal 2 or from Zeppelinheim – handy if you want to spot at the Zeppelinheim viewing platform anyway. You find more on the airport itself on the page about Frankfurt Airport.

In Berlin a visit to the German Museum of Technology and the Military History Museum at Berlin-Gatow Airfield is worthwhile, where the history of the Airlift is also a topic. Which aircraft are on display there changes occasionally – check beforehand whether a particular example is currently on show.

Photo tips for four-engine vintage aircraft

Getting a DC-4 in front of your lens is a rare stroke of luck. A little preparation helps make the shot work.

For airshows with historic aircraft, the article Photographing airshows helps. If the older sister interests you, read the history of the Douglas DC-3.

Common mix-ups and how to rule them out

Conclusion

The DC-4 stands at a threshold of aviation history: it brought the nosewheel landing gear and four engines to Douglas airline service but was almost entirely claimed by the war. Its finest hour came over Berlin, where the C-54 as the Candy Bomber helped supply an entire city. Today it is a genuine rarity – easy to see on the ground in Frankfurt, in the air only with luck and good planning.