Czechnology Posted August 18, 2021 Posted August 18, 2021 Reading through Chuck's Mi-24 guide, it recommends having the "Free Turbine Speed Trim UP/DOWN" bound, but whats the real point of it? I don't understand the guide fully on this topic. It says to bind them and what it does, but doesn't elaborate on what situations we would actually use this switch for.
AeriaGloria Posted August 18, 2021 Posted August 18, 2021 I believe it’s used in both maintenance and to change the idle rpm speed depending air temperature and pressure. I saw a chart in the Cold War air museum manual saying what what temperature and pressure you should trim the turbine speed a certain amount. It’s done before takeoff and has no practical use during flight. Chuck is just replicating the real life controls, not saying that it’s something you need at your finger tips at all times Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com
AlphaOneSix Posted August 20, 2021 Posted August 20, 2021 There is a maintenance check that where you check the full range of the switch. Other than that, for daily flight, before takeoff at some point you would increase the collective to 3 degrees of pitch, and then use that trim switch to set the rotor speed to 95%. If the rotor speed is already 95% at 3 degrees of blade pitch, then you don't need to do anything with the trim switch.
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