12:20 I get that the AOA is not optimal, but why this would create a stall? The AOA decreases when the compressor rpm are low, which means the AOA is way below the critical value.
Thank you for these videos! they are clear and structured, I'm about to head in to a job interview to work on engines, and these videos have been by far the best preparation 🙂
Turbine engines also have accessory drives? I honestly didn't know that. But interesting that it's very similar to the accessory drives of car and truck engines
09:25 I wonder how the Helios accident coul've happened if there is a aural warning of failed pressurization... EDIT: I just read the report and apparently the alarm sounded at around 12'000ft but was misidentified by the crew as a "take-off configuration warning".
hello. video is great , but I have one question. at 5:45, you are saying that as gases goes through divergent passage its velocity is progressively increasing. Shouldn;t velocity decrease and static pressure increase, while gases are going through divergent passage?
According to my understanding, EPR is measured at two points n1 and n2 as the density reduces the pressure on the intake fan commonly denoted ad 'n1' will be less and as we know that exhaust gases pressure at constant rise in throttle is at speed of Mach 1.which is at point'n2' So in simple words n1 reducing and n2 constant so EPR reduces.
What engineering provisions arrange for the free turbine to run at constant rotational speed? Why doesn't it slow down when the load increases? There must be a governor on it, controlling the throttle of the engine.
