Photograph
Alexander Eaglerock A-12 Aircraft with 7-RA Comet Engine
| Right side profile view of an Alexander Eaglerock A-12 aircraft fitted with a Comet 7-RA air-cooled radial piston engine. A model of the Comet Engine Corporation, the engine was manufactured on a Gisholt turret lathe in Madison, Wisconsin. The plane was designed in 1929 by Alexander Aircraft Company of Engelwood, Colorado, a company originally formed in the 1925 by J. Don Alexander. Between 1928 and 1929, Alexander Aircraft company was the world's largest aircraft manufacturer. The A-12 was a two-seat bi-plane airplane that measured 25 ft 11 in length with a 36 ft 8 in wingspan and was powered by a 7-cylinder Comet engine running at 130 hp. The Alexander Aircraft Company later refitted a few A-12 models with the 7-E Comet engine, running at a faster speed of 165 hp. Gisholt Machine Company purchased the Comet Engine Corporation in 1929, and moved the Comet factory from Oakland, California to Madison, Wisconsin. The plane is parked on an airstrip presumably at a hanger in Madison and was used for corporate advertising. Its registration number is X733H and decal text on the tail reads: "Alexander Eaglerock" and "Alexander Aircraft Co." The plane body by the cockpit reads: "Tie your ship to a Comet." |
| Image ID: | 133149 |
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| Creation Date: | 04 22 1930 |
| Creator Name: | Unknown |
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| Collection Name: | Gisholt Machine Company negatives and photographs, circa 1900-circa 1960 (bulk circa 1910-circa 1930) |
| Genre: | Photograph |
| Original Format Type: | negative, original |
| Original Format Number: | PH 7114 Box 2, Sleeve 44 |
| Original Dimensions: | 10 x 8 inches |
| This image is one of forty-nine photographs in this Gisholt Machine Company collection documenting the Comet Engine Corporation. The image is one of three of the A-12 aircraft in this collection. Gisholt Machine Company purchased the the Comet factory in Oakland, California and moved it to Madison, Wisconsin in 1929. For a reproduction, see PH 6896B Box 1, Folder 3 in the Sid Boyum Collection. Sid Boyum was the lens man for Gisholt from 1953 to 1971. |
| Outdoor photography |
| Airplane engines |
| Airplanes |
| Fields (Agriculture) |
| Aircraft industry |
| Aircraft supplies industry |
| Factories |
| This image is issued by the Wisconsin Historical Society. Use of the image requires written permission from the staff of the Collections Division. It may not be sold or redistributed, copied or distributed as a photograph, electronic file, or any other media. The image should not be significantly altered through conventional or electronic means. Images altered beyond standard cropping and resizing require further negotiation with a staff member. The user is responsible for all issues of copyright. Please Credit: Wisconsin Historical Society. |
| Location: | Wisconsin Historical Society Archives, 4th Floor, Madison, Wisconsin |
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