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| Brazilian Clipper by Stan Stokes.
Although commercial aviation progressed in Europe during the 1920s, it remained dormant in America during most of the decade. In the late 1920s two Americans, Juan T. Trippe and Ralph A. ONeill came upon the scene and both were obsessed with the idea of building a dominant American overseas airline. Trippe was born into a prominent family and had attended Yale University. Trippe formed Eastern Air Transport with some of his Yale flying club buddies, and later merged a company into Pan American Airways, a small regional carrier in the Caribbean. Trippe utilized Fokker trimotors in the early days, but as his airline expanded, flying boats became the preferred aircraft because of the fact that they did not require runways and airports. There were few useable airfields in the early days of commercial aviation, but there were plenty of rivers and harbors. Pan Am purchased an S-36 flying boat from Sikorsky Aircraft in 1927. Sikorskys next flying boat was the S-38. It was very successful and saved Sikorsky Aircraft from bankruptcy following the market crash in 1929. The S-40 was the first of the great Pan Am Clippers. Weighing more than 17 tons it was a bit larger than the S-38 and somewhat less ungainly. In flight the S-40 was something to behold. Although the S-40 was successfully deployed on Pan Ams South American routes, it was not capable of making long haul flights necessary to cross the Atlantic or Pacific. The S-42 was Sikorskys response to Pan Ams needs. The first S-42 was built in 1933, and it first flew in March of 1934. The S-42 had a full-length hull unlike the cut off hulls of the prior Sikorsky models. It was powered by four 700-HP radials and utilized the new Hamilton Standard variable pitch props. The aluminum skin of the S-42 was flush riveted to reduce drag. The S-42 was a true seaplane and its fuselage was broken up into nine watertight compartments. It set several world records for weight-to-altitude records with Charles Lindbergh at the controls for several of the record-setting flights. A total of ten S-42s would be produced, and Pan American Airways purchased all of them. They were 69-feet in length with a wingspan of 118 feet. The total wing area was 1340 square feet and the aircraft had a gross weight capacity of 42,000 pounds. Powered by four Pratt & Whitney Hornet Radials generating 750-HP each the S-42 could attain a top speed of 190-MPH in level flight. It had a service ceiling of 16,000 feet. A typical cruising altitude and speed would be more like 140-150-MPH at 5,000-feet. An S-42 was used for survey flights for Pan Ams Pacific routes. The S-42s cut almost 50% off the total travel time for Pan Ams South American long distance routes because the aircraft required fewer stops with its range of 1,120 miles. As depicted in Stan Stokes painting an S-42 makes its inaugural scheduled flight to Brazil in August 1934. The aircraft would be christened the Brazilian Clipper during its visit to Rio by Senora Getulio Vargas, wife of the Brazilian President. |