Aichi AC-1

The Aichi AC-1 was an experimental 330 hp nine-cylinder air-cooled radial engine. In 1929, it was used to power the newly designed Aichi AB-2, a catapult-launched reconnaissance seaplane.

AC-1
Type Radial aircraft engine
National origin Japan
Manufacturer Aichi Kokuki
First run 1929
Major applications Aichi AB-2

The AB-2 with its AC-1 engine is noted for being the first shipboard reconnaissance seaplane and engine combination designed and manufactured entirely in Japan, without foreign assistance. This was a major turning point, not only for Aichi, but for all of the other Japanese aircraft and engine manufacturers, as they no longer need rely on foreign designs.[1]

The engine proved to be a disappointment by not performing as expected. On one test flight, an exhaust fire spread to the airframe and the aircraft was lost, and, soon after, the project ended.

None of these engines survive today, and little is known about them.

Specifications

General characteristics

  • Type: Nine-cylinder, air-cooled, radial aircraft piston engine

Components

  • Valvetrain: Two overhead valves per cylinder
  • Supercharger: gear driven single-speed centrifugal
  • Fuel system: Carburetor
  • Oil system: Dry sump with scavenging pump and pressure pump
  • Cooling system: Air-cooled

References
  1. Mikesh and Abe 1990, p.63.
  • Mikesh, Robert C.; Abe, Shorzoe (1990). Japanese Aircraft 1910-1941. London: Putnam. ISBN 0-85177-840-2
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