Question: Which aircraft designer was born in Frankfurt am Main and had a model produced by Bayerische Flugzeugwerke?

Context paragraphs:
Willy Messerschmitt: Wilhelm Emil "Willy" Messerschmitt (/'vĭli 'messer shmĭt/) (26 June 1898 – 15 September 1978) was a German aircraft designer and manufacturer.  He was born in Frankfurt am Main, the son of Baptist Ferdinand Messerschmitt (1858–1916) and his second wife, Anna Maria née Schaller (1867–1942).

Messerschmitt M 18: The Bayerische Flugzeugwerke M 18 (BFW M 18), (later known as Messerschmitt M 18) was an airliner, produced in Germany in the late 1920s.

Ernst Heinkel: Dr. Ernst Heinkel (January 24, 1888 – January 30, 1958) was a German aircraft designer, manufacturer, Wehrwirtschaftsführer in the Third Reich, and member of the Nazi party.  His company Heinkel Flugzeugwerke produced the Heinkel He 178, the world's first turbojet aircraft and jet plane, and the Heinkel He 176, the first rocket aircraft.  He was awarded the German National Prize for Art and Science in 1938.

BFW M.19: The BFW M.19, sometimes known as the Messerschmitt M 19, was the first in a line of German low-wing single-engine sports planes, designed by Willy Messerschmitt while he worked for Bayerische Flugzeugwerke (BFW).

History of BMW: BMW AG originated with three other manufacturing companies, Rapp Motorenwerke and Bayerische Flugzeugwerke (BFw) in Bavaria, and Fahrzeugfabrik Eisenach in Thuringia.  The company is now known as BMW or Bayerische Motoren Werke.  Aircraft engine manufacturer Rapp Motorenwerke became Bayerische Motorenwerke in 1916.  The engine manufacturer, which built proprietary industrial engines after World War I, was then bought by the owner of BFw who then merged BFw into BMW and moved the engine works onto BFw's premises.  BFw's motorcycle sideline was improved upon by BMW and became an integral part of their business.

Otto Flugmaschinenfabrik: Gustav Otto Flugmaschinenfabrik, founded in 1910 by Gustav Otto, was one of the pioneering aircraft producers at the turn of the 20th century.  It was reorganized into Bayerische Flugzeugwerke, which was merged into BMW AG in 1922.

Swen Swanson: Swen (Sven) Swanson (1897/98 – February 1935) was a Swedish aircraft designer.  He designed aircraft for various aviation companies in the United States and also designed prototype and experimental airplanes.  He was known as an innovative aircraft designer.  He later worked in partnership with Ole Fahlin.  Swanson started designing airplanes while in his teens and by the time he was in college he had designed his third airplane.  He founded the Swanson Aircraft Company Inc. and became its chief engineer and president.  While working for his own company he designed and built the Swanson W-15 Coupe.  He has been described as a "brilliant man of great capabilities and extreme modesty".

BFW M.23: The BFW M.23, sometimes known as the Messerschmitt M 23, was a 1920s two-seat sporting aircraft designed by Willy Messerschmitt, and produced by "Bayerische Flugzeugwerke" (BFW).  Examples won several prestigious races in 1929 and 1930.

Messerschmitt Bf 108: The Messerschmitt Bf 108 "Taifun" was a German single-engine sport and touring aircraft, developed by Bayerische Flugzeugwerke (Bavarian Aircraft Works) in the 1930s.  The Bf 108 was of all-metal construction.

Walter E. Mooney: Walter E. Mooney (June 6, 1925 – March 1, 1990) was a MIT educated engineer, aircraft designer, pilot and model aircraft designer who lived in San Diego, California.  He was well known professionally for his full scale aircraft efforts for Convair division of General Dynamics but more popularly known for the many plans and articles published in the magazines "Model Airplane News", "Boys' Life", and "Aero Modeller" in the 1960s.  He was once featured as a daredevil glider pilot on the 1973 TV series "Thrill Seekers".  He designed the ROHR Two-175 Experimental Aircraft almost put in production to compete against the Cessna 172 in 1971 .

Supporting paragraphs: BFW M.23 Willy Messerschmitt
Answer: Willy Messerschmitt