Will the new “Preferred Turbine-3” carry the Douglas “Dakota” legacy to its 100th anniversary?
Winter in America is cold and out there in that winter wonderland, on 30 January 2018, I rode out to a small town named Kidron, somewhere in between Columbus and Cleveland in the state of Ohio. I was looking for a remote farm-road with a private airstrip. Hard to believe but this is the place where they are remanufacturing old DC-3/ C-47 airframes into new DC-3 Turbo-Props, in series production! I counted 12 DC-3/ C-47 airframes on the Preferredpremises, in an odd mix of original airframes and extended fuselages that had already Turbo Prop engines mounted before they came in here.
More than 25 years ago, I visited the other existing DC-3 Turbo Conversion company, Basler’s in Oshkosh for purchasing their surplus Dakota parts. Ever since, I have been around in the world of the DC-3 and have met that legendary aircraft in all shapes between total decay, dereliction, and full serviceability. I have seen factories or hangars where they renovate or rather remanufacture the Gooney Bird, in Oregon (with Paul Bazely’s AeroMetal), in Virginia (with Robert Randazzo), but also in El Alto, La Paz, Bolivia and in Villavicencio, Colombia where they did total overhauls of engines and complete reskinning jobs. Visiting all those places, I loved every one of them. And again, the Preferred Airparts hangars with the ongoing works on engines and reskinning of wings and airframes, that was an awesome experience for me. With all that vintage flying metal in the background, I’ll never have a dull day.
A century-old transport still at work? Not like an oddball steam locomotive or an exotic museum-supported Airshow Star. But as a vintage aircraft, surviving in numbers over a century, FAA-certified for commercial use, is that viable? Let it be very clear, there is no boat, train, car, truck or plane in the world that can come close to this achievement, so if ever it is going to happen, the venerable C-47/ DC-3 will be most likely the first one in history to do so. This aircraft has a reputed ruggedness and a longevity like no other machine in the world that made people moving faster and farther.
For clarifying the rationale behind this, let it be said that the business-based operation of a DC-3 is a world apart from that of the C-47 in airshow operations. While the authentic DC-3 with its radial engines always will prevail as being the absolute WWII ‘Icon of Victory’ in Museums and on airshows/ meetings, the competitive world of aerial transport knows quite different laws in which arguments like ” I like the original Dakota/DC-3 better” are not adding much to its commercial value. But yes, the argument surely adds sentimental value that counts big time for the aficionados, (myself included) visiting those airshows and museums. But those privately/ museum owned DC-3s, they make far fewer flight hours, with less payload, and speed is no issue so those planes are definitely not in the same demanding Commercial League where speed, payload, and operational costs are major factors to win an air transport contract.
Brian and his brother Mark and nephews Colby and Austin are having a strong confidence in the development of this market of reconditioned/upgraded vintage aircraft as their Preferred Turbine-3 for commercial operations in the more remote terrains where primitive conditions prevail. In such conditions, the ‘Old School’ design features of the DC-3 as its big balloon tires and the taildragger configuration plus its low approach speed come to great avail. The non-asphalted airstrips, muddy jungle roads, and the harsh tundra tracks of the Arctic, they are mostly found in places where often graders are not available for the leveling of the ground, creating a serious threat for the modern aircraft with their high landing speeds and small wheels. But the Dc-3’s Big Wheels keep on turning, in mud, sand, on beaches, riverbanks, and knobbly trails, where smaller wheels get stuck!
The advantages of the Turbo Prop conversion are pretty impressive as we see this list of improvements over the original DC-3 performance chart ( see also their link).
** Max. Payload goes from 3,5 to 5 tons (45 % increase). That is made possible with the addition of more cargo stowing space on a stretched cabin floor.
** Internal loading space makes a 35 % increase, mainly due to that stretching of the fuselage with some 40 inches, right behind the cockpit,
** Max Takeoff weight goes up from 25,200 to 29,000 lbs, with a new lightweight reinforced floor to carry all that extra weight.
** Engine Overhauls (TBO) are needed only after every 6,000 flight hours, compared to 1,200 flight hours for the radial P & W R-1830s. That makes a substantial gain in operational costs and less time lost in maintenance hours.
** Cruising speed makes a major step forward, to some 200 knots, more in the range of its competitor Cessna Caravan.
Read what Brian wrote to me: “The main difference in speed is due to the shape of the cowling. The new cowling greatly reduces drag, our cowling is lighter and easier to remove for service. The dual shaped exhaust stacks that we use also keep the exhaust soot off the airplane. Very little soot collects on the airplane. The radial engines weighed about 1,700 lbs each. The new Turbo engine Pratt & Whitney Canada PT6s weight is about 650 lbs each. We also eliminate the oil tank from the radial engines that carried 29 gallons of oil and replaced it by additional 116-gallon fuel tanks in front of the original firewalls. It brings the total fuel capacity at 1032 gallons. The new 5-blade propellers are also much lighter than the old Hamilton Standard props and are fully reversible, allowing for a better performance during takeoffs and landings on shorter tracks”.
Finally, the gain in speed and payload brings the Turbo-modified C-47 like the Preferred Turbine-3, back in the sphere of a commercially purposeful proposition, in a time where the good old DC-3/ C-47 with radial engines is losing ground in its proficiency to generate revenues.
According to Michael Prophet, US DC-3 freighter operations survived in only two US states: their number is down to only 10 operational piston cargo DC-3s in the US (and 4 in Canada). In Florida (Atlantic Air Cargo & Florida Air Cargo) and in Alaska (TransNorthern Air, Deserts Air, Bush Air) Michael believes the piston cargo DC-3 is fast becoming an endangered species: TMF Aircraft Inc (Florida) went out of business 2 years ago and ‘Catalina Flying Boats Inc’ sold their last cargo DC-3 to Preferred Air Parts.
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