Understanding Helicopter's engine Turboshaft

Turboshafts are an adaptation of gas turbine technology in which the principle output is shaft power from the expansion of hot gas through the turbine, rather than thrust from the exhaust of these gases. They have found a wide variety of applications ranging from air compression to auxiliary power generation to racing boat propulsion and more. however, we will focus primarily on the application of turboshaft technology to providing main power for helicopters, to achieve extended vertical flight