âŠTravel Air âRâ designed by J. Walter Beech. Powered by the Wright Cyclone, a 400-horsepower radial engine with a streamlined NACA cowling that contributed 40 miles (65 km) to its maximum speed of 235 miles (375 km) per hour, the âRâ handily defeated the far more powerful Curtiss biplanes flownâŠ
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