 {| |} the  was a two-row, 14-cylinder air-cooled radial engine used in a number of combat aircraft of the imperial japanese navy and imperial japanese army before and during world war ii.gunston 1989, p.105. ==design and development== the engine was designed by nakajima aircraft company with code name nam, as a scaled-down and advanced version of the previous nal design(army type 97 850&nbsp;hp radial engine, nakajima ha5). the imperial japanese army air force called the first of the series the ha-25 (ã25) and later versions were designated ha35, ha105 and ha115, while the imperial japanese navy air service designation was nakajima nk1, with sub-types identified by model numbers; thus nakajima nk1 sakae 10, 20 and 30 series. a total of 21,166 were made by nakajima; 9,067 were manufactured by other firms. ==variants== ;army type 99 975&nbsp;hp air-cooled radial :long army designation for the nakajima nk1 radial engine named sakae. ;nakajima ha25 :short army designation for the initial production version of the nakajima nk1 radial engine named sakae. ;nakajima ha35 :nakajima ha35 model 11 :nakajima ha35 model 12 :nakajima ha35 model 23 - 1,150 hp (858 kw) ;nakajima ha105 : ;nakajima ha115 :nakajima ha115-i :nakajima ha115-ii ;nakajima nk1 :nk1c sakae 12 - 925 hp (690 kw) , 940 hp (701 kw) , 975 hp (727 kw) :nk1d sakae 11 - 970 hp (723 kw) , 985 hp (735 kw) :nk1f sakae 21 - 1,115 hp (831 kw) , 1,130 hp (843 kw) :nk1e sakae 31 - 1,130 hp (843 kw) , boosted to 1,210 hp (902 kw) with water-methanol injection ==applications== *kawasaki ki-48 *mitsubishi a6m *mitsubishi c5m *nakajima b5n *nakajima j1n *nakajima ki-43 *nakajima ki-115 *kawasaki ki-56 ==surviving engines== a small number of original sakae powerplants are on display in aviation museums, usually mounted into the airframes of restored mitsubishi a6m zeros - only one airworthy zero worldwide still flies with a restored sakae powerplant, the planes of fame museum's a6m5 example, bearing tail number "61-120".seaman, richard. "aircraft air shows." richard-seaman.com. retrieved: 13 october 2010.{{cite av media |people= |year=2009 |title=fli
Aircraft_air-cooled_radial_piston_engines Aircraft_piston_engines_1930a1939 Nakajima_aircraft_engines