The Franklin O-175 (company designation 4AC-176) was an American air-cooled aircraft engine of the 1940s. The engine was of horizontally-opposed four-cylinder and displaced . The power output was nominally . A later variant was designated O-180, despite sharing the same displacement. A related four-cylinder engine of slightly smaller capacity was known as the O-170 or 4AC-171. It produced .

Variants

O-170

;4AC-171:

O-175

;4AC-176: ::4AC-176-B - 65 hp (48 kW) at 2,200 rpm ::4AC-176-BA/(O-175-1) - 65 hp (48 kW) at 2,300 rpm ::4AC-176-C - 75 hp (56 kW) at 2,500 rpm ::4AC-176-D - 80 hp (60 kW) at 2,650 rpm ::4AC-176-F - 80 hp (60 kW) at 2,500 rpm ;4ACG-176

O-180

;4AC-176-F3 (O-180-1)

Applications

* Aeronca L-3D * Bowyer BW-1 flying wing * CAP-4 Paulistinha * Harris Little Jewel *

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* IPT-7 Junior *

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(O-170) *

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* Taylorcraft BF-60 (O-170) * Taylorcraft BF-65

Specifications (4AC-176-BA2, O-175-1)

References

;Notes ;Bibliography * Gunston, Bill. (1986) ''World Encyclopedia of Aero Engines''. Patrick Stephens: Wellingborough. p. 57 {{US military piston aeroengines Franklin aircraft engines 1940s aircraft piston engines Boxer engines