Kuznetsov NK-12

The design that eventually became the NK-12 turboprop was developed after World War II by a team of Soviet scientists and imprisoned German engineers under Ferdinand Brandner, who had worked for Junkers previously; the design bureau was headed by chief engineer Nikolai D. Kuznetsov.

Evolution to the TV-12 12,000 shp (8,900 kW) engine required extensive use of new Soviet-developed alloys and was completed in 1951.

Another engine of similar size, the Pratt & Whitney T57 with 15,000 shp (11,000 kW) and 5,000 lbf (22 kN) jet thrust, ran 3,100 hours before being cancelled in 1957.

It also powered the Antonov An-22 Antei (with NK-12MA), the world's largest aircraft at the time, and several types of amphibious assault craft, such as the A-90 Orlyonok "Ekranoplan".

The combustion system used is a cannular-type: each flame tube is centrally mounted on a downstream injector that ends in an annular secondary region.

The exhaust ports of a NK-12 in an outboard nacelle on a Tu-95
NК-12МV
A pair of Kuznetsov NK-12MAs installed on an Antonov An-22