question: How many separate models of the aircraft flown by the Flotille 17F were manufactured?
answer: 16
context: Title: Flottille 17F
  Passage: Flottille 17F is a squadron of French Naval Aviation which currently flies the Dassault Rafale M from Landivisiau Naval Air Base.  It was formed during April 1958 at Hyeres Naval Air Base and flew the Vought F4U7 Corsair for training purposes.
  Title: Dedalus Poppy
  Passage: The Dedalus Poppy is a homebuilt, single engine, single seat ultralight aircraft flown in Italy in the 1980s.  Several were built and flown; at least one remains on the Italian civil register in 2010.
  Title: Nieuport 28
  Passage: The Nieuport 28 C.1 was a French biplane fighter aircraft flown during World War I, built by Nieuport and designed by Gustave Delage.  Owing its lineage to the successful line of sesquiplane fighters that included the Nieuport 17, the Nieuport 28 continued a similar design philosophy of a lightweight and highly maneuverable aircraft.
  Title: Vought F4U Corsair
  Passage: The Vought F4U Corsair is an American fighter aircraft that saw service primarily in World War II and the Korean War.  Demand for the aircraft soon overwhelmed Vought's manufacturing capability, resulting in production by Goodyear and Brewster: Goodyear-built Corsairs were designated FG and Brewster-built aircraft F3A.  From the first prototype delivery to the U.S. Navy in 1940, to final delivery in 1953 to the French, 12,571 F4U Corsairs were manufactured, in 16 separate models, in the longest production run of any piston-engined fighter in U.S. history (1942–53).
citations: Vought F4U Corsair Flottille 17F