WeirdIncluded Posted January 11 Posted January 11 (edited) Heyo, I was twiddling around with the mi24's engines, and noticed I couldn't get the engines to idle... To my knowledge, there are two main actors on engine and rotor RPM on the ground : The throttle on the collective, and the two engine throttles underneath. After complete startup with the governor engaged, using said throttle collective has an impact on RPMs, both main rot. and engines, so does pulling both throttle levers up (emergency flying on 1 engine etc-) However lowering them to idle has no impact. (Unless you keep the coll. throttle at max) Lower coll. throttles, let the RPMs stabilize, and then hit the levers into idle and there will be no change to RPMs. The engine's RPMs won't drop below 75%, and the main rotor's RPM's won't drop past 65-64% (Unless you start messing with the engine stops) According to some random flight manuals, idle for the mi24 is just between the 45 to 65 bracket... And I've yet to seen a conventional heli without an idle option, I mean- how does it warm up? How does it cool down? Have I missed something? Is it not implemented? I haven't been able to pick apart all the manuals I've come across so there might be some details I've missed. Curious to see if y'all have experienced this. Edited January 11 by WeirdIncluded Spelling
MAXsenna Posted January 11 Posted January 11 I might misunderstand you. The levers are not "throttle anything". They are corrective levers or something. Might be incorrectly labeled in the Controls Settings. "Idle"/correct position for them are not the lowest point, it's the middle. Use the Controls Indicator for reference. They are only to be used for emergencies and engine testing. The only throttle there is, is the twist, and for idle engine, the twist throttle should be maxed at all times, or your generators will come offline. The Mi-8 works the same way. You might find better manuals. Cheers!
WeirdIncluded Posted January 12 Author Posted January 12 Of course, generators would kick off and you'd have to use ground power or APU, but it still feels like it should idle lower... Simply twisting the throttle seems to only bring it down to 65%. Considered flight idle, sure, but still feels high. Just did some tests, after a cold start, on one engine, I'tll (Main rotor) run at ~50%, and with both engines on, it runs at around 61% local flight conditions. Rotor speed that varies depending on engine output is definitely accurate, but again, odd that you can't bring the rotor RPMs lower than that without shutting off an engine... It might be normal but I am curious. (Btw here's the manual I used https://mudspikefiles.s3.dualstack.us-east-1.amazonaws.com/original/3X/7/a/7ab064a7f951b9f0325354f257f5e58c571936d6.pdf )
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