Keywords: Grumman FF-1 N2803J.jpg Photo of a preserved Grumman FF-1 fighter <br> Original caption First flown in 1931 the Grumman FF-1 affectionately known as Fifi was noteworthy for its innovative design characteristics that marked a great step forward in aircraft design - first fighter with retractable landing gear; an enclosed canopy for both cockpits; and an all metal stressed skin fuselage U S Navy photo on the U S Centennial of Flight website http //www centennialofflight gov/essay/Aerospace/Grumman-early/Aero38G1 htm unknown USN PD-USGov Grumman FF/SF |