In the years 1920-1930 they built the known Cirrus engine in its different versions in the United States. These  4-cylinder, inline upright, air-cooled engines had a power ranging between 90 and 98 hp and a total displacement of 310 cubic inches.

"American Cirrus"

-The Mark III gave 100 hp at 2,100 rpm was installed, for example, in the Great Lakes 2T-1A.

-Dedicated to the manufacture of English Cirrus engines under license, it began building the Mark III in Belleville.

-Later the American Cirrus was acquired by Allied Motor Industries.

-The Mark III is available in standard and supercharged version with a Roots type mechanical compressor.

-The main text mentions the "Hi-drive", which also had the nickname "Ensign". This engine had some modifications for inverted flight.

"American Cirrus Ensign"

-This engine also was available with and without supercharger and it also had the possibility of a gearbox in both versions.

-The power remained similar, 110 hp at 2,100 rpm.

-In 1931 this company acquired the remains of the ACE Corp. at bargain prices, following the production of "Upright" and "Hi-Drive". Ceasing in 1935.

-Menasco acquired the remaining stock finishing the production and providing after sales service.

-The inverted Cirrus-Hermes (ADC) model gave 105/115 hp at 1,900/2,100 rpm.

"Inverted Cirrus-Hermes"