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Boyd and A. Fessler. They were also rapidly building up their shop facilities in an effort to make it the best equipped [[strikethrough]]aero[[/strikethrough]] airplane factory on the West Coast. In February, they merged with the AICO Hydroaeroplane Co., founded by Allen Loughead (later spelled Lockheed), who [[strikethrough]]were[[/strikethrough]] was also building a plane. [[strikethrough]]and[[/strikethrough]] They erected a hangar at Ft. Mason with room for two planes. In late February their first flying boat was nearing completion and two more were started.

Early in April, 1913, the first Christofferson flying boat was launched. It was a biplane of 49 ft. span, seated three, and was powered with a 220-230 HP Hall-Scott engine [[strikethrough]]located[[/strikethrough]] installed in the hull, and driving with roller chains [[strikethrough]]a separately mounted high[[/strikethrough]] propeller mounted high between the wings. [[strikethrough]]by roller chain. It was[[/strikethrough]] This aircraft was an immediate success. In May two of these flying boats were sold to Arctic explorer Roald Amundsen for [[strikethrough]]his use in[[/strikethrough]] exploring the polar regions. They were to be capable of operating [[strikethrough]]off[[/strikethrough]] from the water of ice fields. These [[strikethrough]]planes[[/strikethrough]] were built but not delivered to Amundsen, as World War I changed his plans. They [[strikethrough]]aircraft were embargoed and[[/strikethrough]] were never used in the Arctic. [[strikethrough]]They[[/strikethrough]] Later they were sold to Japanese interests. [[strikethrough]]later on[[/strikethrough]]

During he summer of 1913, the Christofferson brothers were very active in exhibition flying at many places throughout the western States. Starting July 14th, Harry flew his Hall-Scott-powered Hydro at the 1913 Potlatch celebration [[strikethrough]]at[[/strikethrough]] Seattle, [[strikethrough]]Wash.[[/strikethrough]] for six days. While there he [[strikethrough]] played [[/strikethrough]] a part in the spectacular record-breaking round-the-world trip of John H. Mears of New York, by fling him from his incoming ship across Elliot Bay to the wharf in record time, using a Christofferson Hydro. In August, Harry and Silas gave exhibitions at Saltair, Salt Lake City, for a time, and while there, Harry became the second aviator to fly off the great Salt Lake, (Glen Curtiss [[strikethrough]]having been[[/strikethrough]] was the first). In the fall of 1913, the brothers began flying [[strikethrough]]actively[[/strikethrough]] at the Panama-Pacific International Exposition, [[strikethrough]]at[[/strikethrough]] San Francisco, carrying passengers and participating in aerial tournaments [[strikethrough]] held [[/strikethrough]] each Sunday. That winter they were very active with their flying and construction work, as well as conducting their school.

Throughout the early spring and summer months they promoted and made many noteworthy record flights and also operated an aerial ferry line between San Francisco and Oakland across the Bay, using their Christofferson flying boat "A[[strikethrough]]IRMAID[[strikethrough]]irmaid." July 8th - 18th 1914, they again flew at the [[strikethrough]]1914[[/strikethrough]] Potlatch celebration in Seattle, [[strikethrough]]Wash.[[/strikethrough]]. In September, they brought out a new [[strikethrough]]outstanding[[/strikethrough]] 3-seat tractor biplane, with tricycle landing gear, [[strikethrough]]and[[/strikethrough]] powered by a 100 HP Hall-Scott engine. This [[strikethrough]]new plane[[/strikethrough]] plane was designed and built to meet military requirments [[requirements]]
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