Flat-four Engine - Aircraft Use

Aircraft Use

Lycoming manufactures a very successful series of flat-4 aircraft engines ranging up to 360 cu in (5.9 L), as used in many smaller Cessna and other general aviation aircraft. Similar engines are produced by Continental Motors, Franklin Engine Company, and others. Retired aircraft engines power many shallow draft boats in the Florida Everglades.

The OS Engines company in Japan has made miniature, air-cooled flat-4 engines in 40 cc and 52 cc sizes for radio-controlled aircraft hobby use, with the 52 cc "FF-320" engine currently in production.

Homebuilt aircraft have been built with Volkswagen and Subaru flat-4 power.