Franklin O-405

Summary

The Franklin O-405 (company designation 6AC-403) was an American air-cooled aircraft engine of the 1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced 405 cu in (6.64 L). The power output was between 200 hp (149 kW) and 250 hp (186 kW) depending on variant. The O-405-9 (6ACV-403) was a vertically mounted, fan cooled version for helicopters.

O-405/6AC-403
Type Piston aircraft engine
National origin United States
Manufacturer Franklin Engine Company
First run 1942

VariantsEdit

6AC-403 (XO-405-1)
200 hp (149 kW) at 2,750 rpm
6ACSA-403 (XO-405-3)
Supercharged, 220 hp (164 kW) at 2,750 rpm
6ACGSA-403 (O-405-5)
Supercharged, geared propeller drive at 0.632:1. 250 hp (186 kW) at 3,200 rpm
6ACV-403 (O-405-9)
Vertically mounted, fan-cooled helicopter version, 245 hp (183 kW) at 3,275 rpm

ApplicationsEdit

Specifications (6AC-403/XO-405-1)Edit

Data from[citation needed]

General characteristics

Components

  • Cooling system: Air-cooled

Performance

  • Power output: 200 hp (149 kW) at 2,750 rpm

See alsoEdit

Comparable engines

Related lists

ReferencesEdit

Notes
Bibliography
  • Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57