Piaggio Stella P.IX
…Piaggio Designer Renzo Spolti First run 1933 Major applications IMAM Ro.37bis Savoia-Marchetti SM.81 Developed from Gnome-Rhône 9K Developed into Piaggio P.X The Piaggio P.IX, or Piaggio Stella P.IX, was an Italian nine-cylinder radial aircraft engine produced by Rinaldo Piaggio S.p.A. Based on the Gnome-Rhône…