Klimov M-120

The Klimov M-120 was a Soviet prototype 18-cylinder liquid-cooled inline aircraft engine designed during the early years of World War II. Testing did not go well and it was cancelled in 1942.

Development

The M-120 was developed by arranging three Klimov M-103A cylinder blocks in an inverted 'Y' configuration, driving a common crankshaft. It began development in 1938 and manufacture of five prototypes began in late 1939. The first prototype was completed on 30 October 1939 and began bench tests the next year. Two M-120TKs were flown in a prototype Ilyushin DB-4 bomber in November 1940. It was submitted for its State acceptance trials in August 1941, but the main connecting rod and the supercharger both broke down and the tests were not completed. The project was cancelled in 1942.

Variants

Specifications (M-120TK)

Data from Kotelnikov, p. 146

General characteristics

M-120 (Michigan highway)

M-120 is a state trunkline highway in the US state of Michigan in the southwest Lower Peninsula. The highway runs northeast from Muskegon to Hesperia. In between, the road passes through suburban Muskegon, forests and farmland. Some 5,900–26,000 vehicles use the highway each day on average as it runs long a series of roads that follow county lines in the area.

The current highway to bear the M-120 designation is the third in the state. The first was a spur route in the Lansing area in the 1930s. The second was a route that connected to like-numbered state highways in both Ohio and Indiana. The current M-120 was originally part of M-20 until that highway was rerouted between New Era and US Highway 31 (US 31).

Route description

The current route starts at Business US 31 (Bus. US 31) where Muskegon Lake and the Muskegon River meet in Muskegon. As it crosses the river, it is known as the Veterans Memorial Causeway, with a section of Veterans Memorial Park between the northbound and southbound sections of the road. This road continues north as Whitehall Road, which connects Muskegon to Whitehall. At Whitehall Road, M-120 turns east on Holton Road and continues in a northeastern direction through the suburb of North Muskegon. The south side of the roadway abuts residential areas and Reeths-Puffer High School; the north side is largely undeveloped. M-120 meets the US 31 freeway in Muskegon Township. Holton Road continues northeasterly past Oak Hill Cemetery and turns northerly at Bard Road. The highway curves to the northeast again through Twin Lake to avoid several lakes in the area. The landscape along the road between Twin Lake and Holton, like much of the overall route of the highway, is woodland. Northeast of Holton, those forests transition to farm land as M-120 turns to the north. The highway meets B-31 as it turns north to run along the Muskegon–Newaygo county line.