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The Warner Scarab is an American seven-cylinder radial aircraft engine, that was manufactured by the Warner Aircraft Corporation of Detroit, Michigan in 1928 through to the early 1940s. In military service the engine was designated R-420. ==Variants== ;Scarab S-50: A 7-cyl. air-cooled radial engine introduced in 1928. With a bore and stroke of 4.25 inches and a compression ratio of 5.2:1, the Scarab developed at 2,050 rpm from with a dry weight of . ;Scarab Junior:A 5-cyl. version introduced in 1930 developing at 2125 rpm from with a dry weight of . ;Super Scarab SS-50/50A: Increased cylinder bore to 4.625 inches to develop at 2,050 rpm from with a dry weight of . ;Super Scarab SS-165: Increased compression ratio from 5.2:1 to 6.4:1 to develop at 2,100 rpm with a dry weight of . ;Super Scarab SS-185: Increased cylinder bore to 4.875 inches, developing at 2175 rpm from , with a dry weight of . ;R-420:Military designation of the Scarab. ;R-500:Military designation of the Super Scarab 165. ;R-550:Military designation of the Super Scarab 185. ;145: Alternative designation for the Warner Super Scarab SS-50/50A . ;165: Alternative designation for the Warner Super Scarab 165 . ;185: Alternative designation for the Warner Super Scarab 185 (Primarily a helicopter application). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Warner Scarab」の詳細全文を読む スポンサード リンク
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