Lyman Wiswell Gilmore, Jr. (June 11, 1874 Beaver Creek, Thurston County, Washington- February 18, 1951) was an aviation pioneer. In Grass Valley, California, USA, he built a steam-powered airplane and claimed that he flew it on May 15, 1902. Due to the requirement of a heavy boiler and the dependency on coal as a power source, the flights would have been short. Proofs of his claim were lost in a 1935 hangar fire.
Gilmore, in a 1936 interview, reported a successful tethered glider flight in 1893 and a free glider flight in 1894. Gilmore further added that (although he had not reported it until 1927) he made a controlled steam-powered flight on May 15, 1902, however all records and papers related to his aircraft were destroyed in a fire.
There are photographs from 1898 showing Gilmore's machine, but none showing it in the air. The claims of the aircraft achieving flight are unconfirmed, and given the weight evident by the grounded aircraft photos, the possibility of flight is highly disputed.
In 1902, Gilmore was granted two patents on steam engines. He invented in other areas too: for example, a rotary snowplow. On March 15, 1907, Gilmore opened the first commercial airfield, Gilmore Airfield, in Grass Valley. There is now a middle school named in his honor on the site of the airfield.
Local legend says Gilmore wore the same long coat for years and was never far from it. It continues to say that when he was involuntarily hospitalized for his last illness the coat and all of his long-worn clothing were burned. While he had never accumulated much money, it was said that all he had was sewn into the lining of that coat and was destroyed with it.
In 1935, Lyman's airplane hangar and the two aging monoplanes were destroyed by fire. The printed story indicated accidental causes, but another version hinted that the fire was retribution for a dead dog ostensibly shot by Gilmore. The fire cancelled plans to exhibit the larger monoplane at the World Fair in Chicago. Gilmore began mining for gold and died a poor man in Nevada City, California. His grave can be found in Pine Grove Cemetery, about a half mile outside of town.
The Lyman Gilmore Elementary School in Grass Valley has the motto, "Flying into the Future" and photos of a mural depicting flight. School children did a YouTube presentation about Gilmore including old video footage of Gilmore and an interview with people who knew him.
- Elam, F. Leland (1936). "Lyman Gilmore, Jr. – Pioneer". Popular Aviation 18 (April): 247–248.
- "The Gilmore Brothers Were Real Pioneers". Popular Aviation 15 (5): 312. 1934.
- "Lyman Gilmore Jr. - Aeronautical Pioneer" by Stephen Barber. Nevada County Historical Society, Volume 30, No. 2. (April, 1976).
- Lyman Gilmore Elementary School. http://gilmore.ca.gvm.schoolinsites.com/
- "In Search of Lyman Gilmore"--a student production as an entry in the California Preservation Foundation film contest http://www.youtube.com/watch?v=gdUOe0vdJhA
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