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Hi,
here is a USA airplane Project with central propeller,to solve the problem
of the un-clear vision for the pilot,they didn't mentioned the name of the
designer ?.
http://www.avia-it.com/act/biblioteca/periodici/PDF%20Riviste/Ala%20d'Italia/L'ALA%20D'ITALIA%201934%2009.pdf
here is a USA airplane Project with central propeller,to solve the problem
of the un-clear vision for the pilot,they didn't mentioned the name of the
designer ?.
http://www.avia-it.com/act/biblioteca/periodici/PDF%20Riviste/Ala%20d'Italia/L'ALA%20D'ITALIA%201934%2009.pdf