Budd C-93/RB-1 Conestoga
The Budd C-93 Conestoga was the first aircraft of original design to be fabricated entirely of shotwelded stainless steel. It was designed to meet a U.S. Navy specification for a twin-engined cargo carrier and troop transport. The Army version was known as the C-93, but the initial order was canceled due to delays caused by manufacturing problems. The Navy version was designated the RB-1, but only 25 of the initial 200 ordered were delivered before cancellation of that order.