"5440"^^ . "119"^^ . "2"^^ . "14000"^^ . "260"^^ . "1918"^^ . "46"^^ . "58"^^ . "33"^^ . . "2"^^ . . "The Gallaudet D-4 was an unusual biplane designed and built by Gallaudet Aircraft Company for the United States Navy. It was powered by a Liberty L-12 engine buried within the fuselage which turned a large, four-bladed propeller attached to a ring around the center fuselage. Only two were constructed, with the second being accepted by the Navy for service as an observation aircraft."@en . "eng"@en . "3"^^ . "None"@en . . . "Gallaudet D-4"@en . "1"^^ . "6"^^ . "5"^^ . "2"^^ . "The Gallaudet D-4 was an unusual biplane designed and built by Gallaudet Aircraft Company for the United States Navy. It was powered by a Liberty L-12 engine buried within the fuselage which turned a large, four-bladed propeller attached to a ring around the center fuselage. Only two were constructed, with the second being accepted by the Navy for service as an observation aircraft."@en . . "4228"^^ . "1918"^^ . "8"^^ . . "Liberty L-12 V-12 water-cooled piston engine"@en . "390"^^ . . . "360"^^ . . "11"^^ . . "30"^^ . . . . . "Navy Observation Aircraft"@en . "628"^^ . "Wagner, Ray. American Combat Planes , p. 118."@en .