Hi all, I am not able to physically understand the term "load" when we refer to Single Shaft Gas Turbine engines used for power generation purposes. What is causing the torque on the Gas Turbine (GT) to change? Again how the speed is maintained constant while the torque is varied? For a single shaft GT, shouldn't decreasing the load also decrease the speed, since we will be supplying lesser fuel? Any intuitive explanation related to the this (working of GT for various loads), the explanation of torque-speed curve and how GT's behave in general, is what I want to understand. Also why part load efficiency of GT's is poor? What causes this loss of efficiency? I would be grateful for any explanations, resources or books you direct me at. Thanks in advance!!