The Franklin O-805 (company designation 12AC) was an American air-cooled aircraft piston engine, designed in the mid-1940s and was to be used in radio-controlled pilotless drones that were to be guided from an accompanying control plane. Due to project requirement changes and cancellations the engine was not produced. A smaller displacement 12-cylinder Franklin engine of 1941 was known as the O-595 or 12AC-596.

Variants

O-805

;12AC-806:0 ;12ACG-806 (XO-805-1): at 3,200 rpm, geared to 0.632:1. ;12ACGSA-806 (XO-805-3 and O-805-5): at 3,200 rpm, supercharged and geared to 0.632:1 (XO-805-3), or to 0.587:1 (O-805-5).

O-595

;12AC-596: at 2,600 rpm ;12ACG-596: at 3,500 rpm

Applications (intended)

* Interstate XBQ-5 * Interstate XTD2R-1

Survivors

* There is an O-805-2 on display at the

New England Air Museum The New England Air Museum (NEAM) is an American aerospace museum located adjacent to Bradley International Airport in Windsor Locks, Connecticut. The museum consists of three display hangars with additional storage and restoration hangars. Its co ...

Bradley International Airport Bradley International Airport is a public international airport in Windsor Locks, Connecticut, United States. Owned and operated by the Connecticut Airport Authority, it is the second-largest airport in New England. The airport is about hal ...

, Windsor Locks, CT * One surfaced and was sold privately in August, 2016, on eBay for US$8500.

Specifications (12ACGSA-806/XO-805-3)

References

;Notes

External links

A table showing the relationship of the military models
{{Aeroengine-specs 1940s aircraft piston engines Franklin aircraft engines