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Why Flying the DC 6 Was So Demanding

Flight Zone

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The Douglas DC-6 was one of the most advanced piston airliners ever built. Pressurized, powerful, and capable of transatlantic flight, it represented the absolute peak of pre-jet commercial aviation. But behind that performance was an aircraft that demanded constant attention from its crews.
In this video, we examine why flying the DC-6 was so demanding. From four 18-cylinder Pratt & Whitney Double Wasp radial engines to complex fuel management, pressurization systems, reverse-thrust propellers, and nonstop transatlantic workload, the DC-6 pushed pilots and flight engineers to their limits.
We also cover the catastrophic 1947 grounding of the entire DC-6 fleet, the design flaw that caused deadly in-flight fires, and how Douglas transformed the aircraft into one of the most respected long-range piston airliners ever flown.
This is the story of an aircraft that rewarded skill, punished mistakes, and became one of the defining airliners of the piston era.
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Timestamps:
00:00 — Cold Open
01:32 — Where the DC-6 Came From
04:18 — The Fires That Grounded the Fleet
07:28 — Why the DC-6 Was So Demanding
12:54 — Managing Four Radial Engines
18:40 — Fuel Systems and Crew Workload
22:37 — The Reality of Transatlantic Flying
27:58 — Why Pilots Respected the DC-6
31:42 — The DC-6’s Legacy and Survival
35:10 — Final Thoughts

20 Comments

@FlightZoneAviation Creator 4 months ago Pinned

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@ghtaboma 4 months ago

In 1959, my first flight was from Burbank, CA, to Honolulu. On a DC 6B. I had a window seat overlooking the right wing. While gazing at the engines, I noticed oil streaming out of the inboard engine. I told the stewardess, and she brought the captain over. He looked out the window and said: ‘don’t worry they always leak like this”! Very reassuring.

@georgeconway4360 4 months ago

The original DC6 was flown by a crew of two Captain and First Officer(Co-Pilot). Due to the number of accidents the authority in place at the time issued a rule to require a Flight Engineer. I worked as a DC8 First Officer for an operator a YIP flying auto parts. The company also operated a fleet of DC6s. Most days flights were live one way and empty the other, a ferry flight. FAR121 required the DC6 to be operated with two pilots and a Flight Engineer. The empty legs were operated FAR91 so the Flight Engineer was just a jump seater. That way the Flight Engineer could actually fly 200 hours in a 30 day period rather the FAA Max of 100 hours in a 30 day period. We also were not paid by the hour. We were paid by Post Office Miles between cities. I recall the DC8 FO pay was a small base salary plus 2.5 cents per post office mile. Just a little of interesting aviation history.

@fredc3543 4 months ago

Easy to understand why jet engines became so popular.

@dalemilton5773 4 months ago

although a helicopter pilot in the navy, i was one of the last radial engine qualified pilots. most everybody were flying the turboprops. so i was occasionally able to snag a copilots seat on c-118s & c-131s. because i could operate the engines & knew all the settings. ditto for s-2s & c-1 CODs. great fun.

@Azimech77 3 weeks ago

The mighty roar of them when flying over ... best sound ever!

@matthewstorm5188 1 month ago (edited)

It seems like running a fleet of DC6’s these days would be incredibly expensive. Between the cost of needing more crew to fly them, the high fuel cost of avgas vs Jet A, the increased maintenance needs of large piston engines vs turboprops, and the difficulty of obtaining parts for an engine that has been out of production for the better part of a century, I can’t see why an air transport company would choose to run DC6s over more modern equipment in 2026. At the very least, I would think that they would be converted to turboprops like the Basler DC3.

@donalddominic3860 4 months ago

Glad to see they are still Flying 😊

@johnbrinkerhoff8792 4 months ago

Flew the DC-6 as a S/O and F/O. It was complex and nothing, except prop sync, was automated. It was a very forgiving airplane to fly as a pilot, much like a very large Cessna 150 with lots of noise and vibration. A S/O climbing out in icing conditions was very busy, constantly adjusting all four carb Heat, mixture and throttles. The other high workload time was reversing and un-reversing on landing. Mixtures near cut off to keep the engines running at idle just at touchdown, then match the pilot flying with the right increase in mixture as the throttles were pulled into the reverse range and match again as the pilot un-reversed..

The grounding was actually the overboard fuel drain from #3 engine pressure carburetor that under some conditions would flow backwards to the trailing edge of the wing, then make a 90 degree turn and flow to the fuselage, make another 90 and flow backwards and enter the inlet for the gasoline fired cabin heater in the hydraulics compartment. When the cabin heater would fire up due to the cabin getting cold, big boom and a fire that the one pound fire extinguisher could not put out. Took extensive wind tunnel testing to figure this out.

@scottwatts3879 4 months ago (edited)

I flew in C-118 many times between 1976 and 1980 as a passenger.
The pilots never looked overworked at all.
We also never flew above 12,000 ft, and usually much lower (low enough to see the cows below)

@peterprest1222 1 month ago

In 1969 my wife and I flew in an Ariana Airlines DC6B from Herat in Afghanistan to Mazar-I-Sharif in the North. It flew low over the mountains and some passengers knelt in the aisle to pray. The plane had been used for pilgrim transport to Mecca. There was a story that some passengers lit a fire in the aisle to make tea. I don’t know if it was true but for most passengers it was their first flight.

@RobertSkene-qw3ob 4 months ago

Demanding but in the hands of a GOOD PILOT got you there in one piece !!🇨🇦😄

@AviationHeritage 3 months ago

That 1947 cooling intake and fule vent design flaw is a terrifying example of early interconnected systems

@ComradeKranky 4 months ago

I flew across the Atlantic from NY Idlewild to Shannon, Ireland to Frankfurt Rhine-Main in a MATS DC-6 when was 10 years old. My first airplane flight!

@alfonsosimons-f2g 1 month ago

In 1972 flew from Lima Peru to Moyobamba Peru in the DC-6 of Faucett Peruvian Airline, the best flight of my life

@FlightZoneAviation Creator 4 months ago

The DC-6 had autopilot that could help maintain heading and attitude, but they were not capable of managing engine power, balancing fuel, automating cruise management, handling engine synchronization and monitoring temperature.

@paulwarner5395 1 month ago

If you watch the airport live streams from Anchorage, Alaska you occasionally see a DC 6 take off and land . It's used as a freighter.

@TenorCantusFirmus 1 month ago

Peak piston-engined planes were fascinating, but the workload required clearly meant they had arrived at their practical limit, and jets were sooner than later to be developed to replace them.
Good thing was many pilots back then were WW2 veterans, they were used to be under pressure and to bear heavy workloads.