Gyro Motor Company

Gyro Motor Company was an American aircraft engine manufacturer.

Gyro Motor Company

Successor	Gyro Company (1917)
Founded	1909
Headquarters	774 Girard St NW Washington, D.C., 20001
Key people	Emile Berliner, Joseph Sanders

The Gyro motor company was formed in 1909 by Emile Berliner to pursue production of rotary engines. His designs were improvements of the Addams-Farwell rotary engine Berliner used in early helicopter experiments. The engines at the time of his 1901 experiments were 20 lbs per hp. Addams-Farwell built a custom engine that weighed 3-4 lb per hp. Berliner donated the engine to the National Air and Space Museum, and pursued his own advanced version.[1] He built a small factory on 774 Girard Street in Washington D.C. next to another small factory for his Victor record players.[2] Gyro incorporated with $100,000 in stock in 1911[3] and manufactured three varieties of the rotary engine. A Three, Five and Seven cylinder model each with the same bore and stroke.[4] His engines featured a 40 lb cast nickel-steel cylinder assembly that was machined down to just 6 1/2 pounds with spiraling cooling fins adding strength.[5] Emile experimented with graphite powder suspended in the fuel as a method of light-weight lubrication. A monoplane built by the Washington Aeroplane Company set an American endurance record with a Gyro Seven cylinder engine of 4 hours and 23 minutes in the air.[6]

In December 1912, Berliner traveled to Germany and set up a German manufacturing component in Adlershof to market the Gyro engines with a $500,000 capitalization.[7] In London, pilot Beatty demonstrated a Wright aircraft retrofitted with a 50 hp Gyro engine.[8] The Gyro progressed to 80 hp in the seven cylinder model by 1913, and up to 110 hp in the Model L nine cylinder "Duplex" with a unique cam driven exhaust valve. The French Gnome Omega and future variants proved to be more popular in sales. Motorenfabrik Oberursel developed its own rotary from the Gnome Monosoupape that would power many World War I fighters. In June 1914, Berliner's nephew, Joseph Sanders became the general manager. He purchased the assets in May 1917, forming the Gyro Company.[9] Gyro motor production did not continue past World War I, when a flood of advanced designs were introduced to the market.

Engines

Summary of aircraft built by Gyro Motor Company[10]

Model name	First run	Number built	Type
Gyro Motor Three Cylinder	1907	1+	Three cylinder 22 hp rotary
Gyro Motor Five Cylinder	1907	1+	Five cylinder 35 hp rotary
Gyro Motor Seven Cylinder	1907	2+	Seven cylinder 50 hp - 80 hp rotary
Gyro Motor Duplex Model J	1914	1+	Five cylinder 50 hp
Gyro Motor Duplex Model K	1914	1+	Seven cylinder 90 hp
Gyro Motor Duplex Model L	1914	1+	Nine cylinder 110 hp

See also

• Gnome et Rhône

References

1. Emile Berliner (November 1913). "Revolving cylinder motors". Aeronautics.
2. "Adams-Farwell Engine". Retrieved 9 July 2012.
3. The automotive manufacturer, Volume 52. January 1911. Missing or empty |title= (help)
4. Aero and hydro America's aviation weekly By Edmond Percy Noël, Aero Club of Illinois: 388. 10 February 1912. Missing or empty |title= (help)
5. John B. Rathbun. Gas, gasoline and oil engines, including complete gas engine glossary. p. 133.
6. Automobile Journal, Volume 34. p. 68.
7. Aero and hydro: 198. 14 December 1912. Missing or empty |title= (help)
8. Aeronautics. September 1913. Missing or empty |title= (help)
9. Who's who in the nation's capital. p. 448.
10. Glenn Dale Angle. Airplane Engine Encyclopedia. p. 226.

Bibliography