East Germany Air Force was large user of MIG-23 jet fighter aircrafts. There was overhaul factory of them in Dresden, some of Czechoslovak Air Force aircraft were overhauld there.
Rotor assembly with center bearing box on engine Tumanskij M-11. Three stage low pressure compressor is driven by single stage low pressure turbine. Three stage high pressure compressor is driven by single stage high pressure turbine. Tubes on bearing box serve transfer cooling air to the high pressure turbine disc.
