At the time, it was the largest twin engine aircraft in the world, being around 23.25 metres long and nearly 33 metres wide. It was powered by two Pratt and Whitney R-2800-51 Double Wasp engines, propelling it to a top speed of 269 mph and giving it a maximum range of 1,600 miles. The size of its hold allowed it to carry up to 50 troops or 12,500 lbs of cargo.