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 __NOTOC__ The CAP-4 Paulistinha was a military and civilian trainer aircraft built in Brazil during the 1930s and 1940s. It was originally developed by Empresa Aeronáutica Ypiranga (EAY) as an unlicensed copy of the Taylor Cub powered by a Sal ...

* Harris Little Jewel *

Interstate Cadet The Interstate Cadet was an American two-seat tandem, high wing, single-engine monoplane light aircraft. Around 320 of these aircraft were produced between the years 1941 and 1942 by the Interstate Aircraft and Engineering Corporation based in El ...

IPT-7 Junior The IPT-7 Junior was a light aircraft manufactured by the Brazilian Instituto de Pesquisas Tecnologicas (IPT). Design and development Frederico A. Brotero, a chief-engineer at the Instituto de Pesquisas Tecnologicas, designed a light multirole a ...

Jensen Sport Jensen may refer to: People *Jensen (surname) *Jensen (given name) *Jensen (gamer), Danish professional ''League of Legends'' player Places Australia * Jensen Oval, Sydney, Australia, a soccer park * Jensen, Queensland, a suburb of Townsvill ...

(O-170) *

Langley Twin __NOTOC__ The Langley 2-4, variously described as the Langley Monoplane or Langley Twin was a twin-engine utility aircraft built in the United States in 1940. Named in honour of Samuel Pierpont Langley, the aircraft was designed to make use of no ...

Piper J-3 Cub The Piper J-3 Cub is an American light aircraft that was built between 1938 and 1947 by Piper Aircraft. The aircraft has a simple, lightweight design which gives it good low-speed handling properties and short-field performance. The Cub is Pi ...

Piper J-4 The Piper J-4 Cub Coupe is a two place side-by-side version of the Piper J-3 that was built between 1938 and 1942 by Piper Aircraft. It was Piper's first model with side-by-side seating; combined with docile low-speed handling, this made it a good ...

Piper L-4 The Piper J-3 Cub is an American light aircraft that was built between 1938 and 1947 by Piper Aircraft. The aircraft has a simple, lightweight design which gives it good low-speed handling properties and short-field performance. The Cub is Pi ...

Porterfield Collegiate __NOTOC__ The Porterfield Collegiate is an American-built two-seat training and touring monoplane built by the Porterfield Aircraft Corporation of Kansas City. Design Developed originally as the Porterfield Zephyr, under Approved Type Certifica ...

* 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