Sikorsky S-30

The Sikorsky S-30 was a proposed aircraft design by Igor Sikorsky, to be built by the Sikorsky Manufacturing Corporation at Roosevelt, New York, in 1925. The twin-engine biplane was meant to fly mail routes or to be fitted out as a commercial passenger airliner with a crew of two and room for ten passengers or 1,800 pounds of load. Two 200 horsepower Wright Whirlwind nine-cylinder air-cooled radial engines were specified, with a cruising speed of 100 miles per hour and a range of 500 miles. No example of the S-30 was ever manufactured.