Franklin O-175

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 175 cuin. The power output was nominally 80 hp. 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 60 hp.

O-170

 * 4AC-171:60 hp

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
 * Interstate Cadet
 * IPT-7 Junior
 * Jensen Sport (O-170)
 * Johnson-Funke monoplane
 * Langley Twin
 * Piper J-3 Cub
 * Piper J-4
 * Piper L-4
 * Porterfield Collegiate
 * Taylorcraft BF-60 (O-170)
 * Taylorcraft BF-65