Brooke "Non Gyro" Motor Company, was based in Chicago. Sometimes referred to as Brooke-Kuhnert Co.

-The "Non Gyro" was a double row rotary engine and had a total of ten cylinders.

Despite the name, it was rotating. Its most important feature was that it could also work with only five cylinders.

-It gave 85 hp and it had two Stromberg carburetors. It was the "E" type.

-The intake valves were in the piston head and the exhaust valves in the cylinder head with a small spring to keep them closed. Later while running, the centrifugal force kept them closed.

-Stroke and diameter were 4.25 x 4.25 inches.

-Another engine was the "Multi X", a rotary engine with six cylinders in two-rows of three with a total displacement of 231 cubic inches giving 24 hp.

"Brooke Multi-X"

From appendix 6: Thomas Preston Brooke made the "Non-Gyro" (from "Non-Gyroscopic") engines to increase aircraft stability.

"Diffused photograph of Brooke"

-Now we have other photographs of the two row 10-cylinder engine. In the main text is mentioned a 6-cylinder engine with two rows of 3 cylinders, which also existed).

"Rather unclear view of the 10-cylinder engine"

"Better detail of the 10-cylinder engine"

"The Brooke engine on a bench"