O-200/4AC-199
Franklin O-200 engine on display at the Hiller Aviation Museum
Type	Piston aircraft engine
National origin	United States
Manufacturer	Franklin Engine Company
First run	1941

The Franklin O-200 (company designation 4AC-199) was an American air-cooled aircraft engine of the early 1940s. The engine was of four-cylinder, horizontally-opposed layout and displaced 200 cu in (3 L). The power output ranged between 65 hp (48 kW) and 100 hp (75 kW) depending on variant. The O-200-5 (4ACG-199) featured a geared propeller drive.

Variants

4AC-199

O-200-1

O-200-3

O-200-7

O-200-9

4ACG-199

O-200-5

Applications

Direct drive

• CAP-1 Planalto
• CAP-5 Carioca
• Aeronca Arrow
• Babcock LC-11
• Culver Cadet
• LAR-90
• XPQ-8
• TDC-1 target drone
• Interstate Cadet
• Langley Twin
• Monocoupe 90
• Piasecki PV-2
• Rearwin Skyranger
• Sackett Jeanie
• Stinson 10
• Stinson L-9
• Stout Skycar

Geared drive

• Convair (Stinson) Model 103
• Spratt Tilt-Wing
• Goodyear Duck
• Interstate Cadet
• Interstate L-6
• Piper PA-7 Skycoupe

Specifications (O-200-5/4ACG-199)

Data from^{[citation needed]}

General characteristics

• Type: 4-cylinder air-cooled horizontally opposed aircraft piston engine
• Bore: 4.25 in (108 mm)
• Stroke: 3.5 in (88.9 mm)
• Displacement: 198.6 in³ (3.25 L)
• Dry weight: 224 lb (102 kg)

Components

• Cooling system: Air-cooled

Performance

• Power output: 102 hp (76 kW) at 3,500 rpm