S-4 Stalinets

S-4 Stalinets
An S-4 combine harvester in East Germany
Type	Combine harvester
Manufacturer	Krasnoyarsk combine harvester plant Tula combine harvester plant Syzranselmash plant Taganrog combine harvester plant
Production	1947–1958
Length	8000 mm
Width	4300 mm
Height	3600 mm
Weight	5200 kg
Propulsion	Tyres
Engine model	ZIS-120 (Otto, 5.555 dm3)
Flywheel power	39 kW
Speed	1.7…14.6 km/h
Preceded by	S-1 Stalinets
Succeeded by	SK-3

The S-4 «Stalinets» (Russian: С-4 «Сталинец»), is a self-propelled combine harvester, made by several different combine harvester plants in the former Soviet Union, from 1947 until 1955. In 1955, the modernised variant, called the S-4M, was introduced; it was put out of production in 1958. In total, 29,582 units were built. In former East Germany, the S-4 combine was built under licence by the IFA as the Fortschritt E 170 series (E 171, E 173, E 174, E 175, E 176, and E 177), from 1954 until 1967.^[1] Unlike the original S-4, which is powered by an otto engine, the Fortschritt E 170 series combines were all powered by a diesel engine, and some of them came with a chaff waggon rather than a straw waggon.^[2]

The S-4 is the first self-propelled Soviet combine harvester, it succeeded the S-1, one of the early 1930s Soviet pulled combine harvesters. There is no evidence of existing S-2 and S-3 models, it is therefore likely that they were both cancelled during the development phase. When the S-4 was introduced in 1947, it was first built at the Krasnoyarsk combine harvester plant. The second generation of self-propelled Soviet combine harvesters, the SK-3, was introduced in 1958.^[3] In East Germany, the successor to the Fortschritt E 170 series was the Fortschritt E 512, an entirely new combine harvester, designed from scratch. A transition model, called the Fortschritt E 510, which was still based upon the 1947 S-4, had been developed, but was eventually not put into series production.^[4]