Franklin 2 series
The Franklin 2 series of American two-cylinder air-cooled horizontally opposed aircraft engines were produced in the 1930s and 1940s.
Variants
''Data from:''O-110
;2A4-45: at 2,650rpm;2A4-49: at 3,000rpm
;2A-110: at 3,000rpm
;2AL-112: alternative designation of the 2A4-45
;PZL-F2A: The Franklin 2 series produced under licence in Poland
O-120
;2A-120: at 3,200rpm;PZL-F2A-120-C1:Production in Poland of the 2A-120