A structure of the demonstration unit for 2.5 MW gas-turbine engine (GTE) gasgenerator was developed, and its manufacture is underway. Its efficiency is over 42%, the hot gas temperature at the turbine inlet is 1350 degrees C and the cooling air flow does not exceed 2% [1]. The high temperature path of the gasgenerator, including the combustor and recuperator, are made of ceramics ''SUGRAV' [2].