Lycoming O-235

The Lycoming O -235, originally referred to as the Lycoming O -233 is a piston aircraft engine of the U.S. manufacturer Lycoming.

Construction

It is an air-cooled 4- stroke boxer engine with four cylinders. The bore is 111.1 mm and stroke of 98.4 mm. This results in a displacement of 3818 cc (235 cubic inches ). The propeller is driven directly. The compression is, depending on the variant, 6,75:1 to 9,7:1. The engine was approved on 26 August 1940 and is still manufactured today.

The O -235 provides between 75 kW ( 100 hp ) at 2450 min -1 and 93 kW (125 hp ) at 2800 min -1. From this engine tens of thousands of copies have been built to date. He is one of the most commonly used aviation engines at all. Among other things, he came into the Beechcraft 77, the Cessna 152, Robin R3000, Piper J -5 Piper PA -12 and PA -38 Piper used. In Germany, for example, used it Heini Dittmar to drive his motor - gull HD -156 B.

O -290

The Lycoming O -290 corresponds to the dimensions of the O -235 but has a 111 mm increased to 123.7 mm bore. The power increases to 135 hp ( 140 hp take-off power ) at a speed of 2800 min -1. The compression is 7.0: 1, the weight of 120 kg.

Another engine of the manufacturer with the same bore and stroke is the Lycoming O -350 with six instead of four cylinders.