A two-spool design for a turboshaft engine with a high-pressure compressor connected to a low-pressure turbine

A turboshaft engine comprising:

• a low-pressure compressor;
• a high-pressure compressor;
• a low-pressure turbine;
• a high-pressure turbine;
• and
• regulator means for regulating a speed of rotation of the low-pressure turbine to a speed that is substantially constant,
• wherein the low-pressure turbine is coupled by a first shaft to the high-pressure compressor, while the high-pressure turbine is coupled by a second shaft to the low-pressure compressor, the first shaft passes coaxially inside the second shaft, the first and second shafts defining an axial direction,
• wherein the high-pressure compressor, the low-pressure compressor, the high-pressure turbine, and the low-pressure turbine are arranged in that order along the axial direction.