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The Franklin 8 series of 8-cylinder air-cooled horizontally opposed aircraft engines produced in the 1940s and 50s, (US military designation O-540 was applied to the 8ACG-538, 8ACSA-538 and 8ACGSA-538). ==Variants== ''Data from: ;8AC-398: @ 2,600 rpm. ;8ACG-398: @ 3,500 rpm. The 8ACG-398 was unusual in using a reduction gearing for take-off and direct drive for cruising. ;8ACG-538: @ 3,200 rpm geared to 0.632 (XO-540-1) ;8ACGSA-538: @ 3,200 rpm supercharged and geared to 0.632 (XO-540-3 and O-540-5) ;8ACSA-538: supercharged (XO-540-7), powered the Northrop N-9MB. ;O-540:Military designation for the 8ACG-538, 8ACSA-538 and 8ACGSA-538 engines 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「Franklin 8 series」の詳細全文を読む スポンサード リンク
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