Gnome B-2 'Monosoupape'

Gnome B-2 'Monosoupape' aircraft engine at the New England Air Museum


Type:   9-cylinder, single-row, rotary, piston
Displacement:   782 cu. in
Weight:   303 lbs.
Power Output:   115 hp @ 1,300 rpm
Year:   1916
NEAM Id:   16
Location:   Connector between the Military and Civil Hangars

Courtesy of the Chicago Museum of Science and Industry

The French Gnome engine company was the first to produce rotary engines for aviation beginning in 1908. In 1913, previous two-value cylinders were redesigned to have only one-value (monosoupape) to simply the design and improve durability. A British aircraft designer declared it “one of the greatest single advances in aviation.” Built under license in Britain, the B-2 was used extensively in a number of World War I aircraft.

License manufactured in the United States by the Aeronautical Engine Corporation of Long Island, New York, the B-2 powered the Thomas Morse S-4 and Standard E-1 advanced trainers.

In addition to the above mentioned, other aircraft to use the Gnome B-2 included:

  • Avro 504
  • Airco DH.2, DH.5
  • Blackburn Scout, T.B, Triplane
  • Bristol Scout
  • Nieuport 12, 28
  • Royal Aircraft Factory B.E.8, F.E.8
  • Short S.70, S.80, Type C
  • Sopwith Circuit Seaplane, Gunbus, 807 Folder Seaplane, Scout, Pup, F.1 Camel
  • Vickers Gunbus, E.S.1, F.B.12, F.B 19

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