(The C-47 was) “one of the most vital pieces of military equipment used in winning the war.” -- Dwight D. Eisenhower.
Some aircraft seem to fly forever. A prime example has been the DC-3/C-47. The latest revival for this iconic plane is a refurb that creates a 13 ton aircraft with a rebuilt and lengthened fuselage, upgraded wings, new engines, and modern electronics. Called the BT-67, it is in use by eight civilian (including the U.S. Forestry Service) organizations and nine air forces (including the U.S. Air Force and the Chinese Air Force). The BT-67 is about a meter (three feet) longer than the original DC-3 and 1.5 tons heavier. Cruising speed is 380 kilometers an hour, compared to 240 for the DC-3. Range is more than twice the 1,600 kilometers of the DC-3. Typical load for the BT-67 (4 tons) is also about twice what the DC-3 would normally haul. The longer range made the rugged BT-67 capable of delivering airfreight to research stations in Antarctica, from an airport in South Africa. The BT-67s cost about $5 million each.
Here's the link for the Basler BT-67, and here's a photo of one in Antarctica: