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Hall-Scott A-7-A In-line 4 Engine, 1917. Creator: Hall-Scott
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Hall-Scott A-7-A In-line 4 Engine, 1917. Creator: Hall-Scott
The Hall-Scott Motor Car Company, with general offices in San Francisco and factories at Berkeley, California, began specializing in the construction of airplane engines in 1911. The water-cooled 30 kW (40 hp) Type A-1 was the first aircraft engine produced by the company. This was followed the 45 kW (60 hp) Model A-2 and the 60 kW (80 hp) Model A-3, both water-cooled V-8 engines. The Hall-Scott Model A-7-A primarily powered the World War I Standard Aero Corporation Standard J aircraft. The Standard J and its Hall-Scott A-7-A engine along with the Curtiss JN-4D with its OX-5 engine were the two primary trainer aircraft and engines built in the U.S. during World War I. Despite vibration common to four-cylinder engines at the time, the A-7-A was otherwise regarded by experts as a rugged and dependable motor. The A-7-A also powered other Standard, Aero Marine, and Dayton-Wright aircraft
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Media ID 23877419
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Air And Space Museum Air Transport Aircraft Aviation Engine Flight Nasm National Air And Space Museum Propulsion Propulsion Reciprocating Rotary Reciprocating Motion Rotary Engine 1st World War
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EDITORS COMMENTS
This print showcases the Hall-Scott A-7-A In-line 4 Engine, a remarkable creation by the Hall-Scott Motor Car Company in 1917. Renowned for their expertise in airplane engine construction since 1911, this American company based in San Francisco and Berkeley specialized in developing powerful engines for aircraft during World War I. The A-7-A engine played a crucial role as it primarily powered the Standard Aero Corporation Standard J aircraft, one of the key trainer planes used during the war. Alongside its counterpart, the Curtiss JN-4D with its OX-5 engine, these two combinations became synonymous with aviation training at that time. Despite some vibration issues common to four-cylinder engines of that era, experts hailed the A-7-A as an exceptionally robust and reliable motor. Its performance surpassed expectations and contributed significantly to advancing air transport technology during this pivotal period. Notably, this historic artifact represents more than just an engine; it symbolizes America's dedication to innovation and technological progress during World War I. With materials such as aluminum steel copper textile paint rubber preservative coating brass phenolic incorporated into its design, this masterpiece exemplifies how different industries collaborated to create cutting-edge propulsion systems. Preserved within Smithsonian Institution's National Air and Space Museum (NASM), this photograph captures not only a significant piece of heritage but also serves as a reminder of our nation's pioneering spirit in aviation history.
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