As far as structure was concerned, the DWC was identical to the DT-2. The internal equipment, however, was specially designed for a round-the-world attempt by the US Army Air Service and the saving in weight by deletion of the military load (torpedo with release gear, firing sight, etc) was used to increase the range of the aeroplane to 3,540km by fitting extra petrol and oil tanks - the former totalling 2,437.8 litres. Able to-be fitted with wheel or twin-float landing gears, the all-up weight with the latter was 3,710kg. The engine, the improved 313kW Liberty, offered a weight of less than 0.91kg per hp. Only four aircraft were built.