Cgjunk2 Posted September 12 Posted September 12 Hello, Sorry for the dumb question, but I haven't been able to find a clear answer to this in a while. Now that I'm playing more with the internal cargo feature, I've become more curious to learn what it measures. The EPR gauge on the bottom left area of the pilot instrument panel is named in the manual as the Engine Pressure Radio instrument (#2 in picture). Is "radio" a typo, or is it meant to be "ratio"? Also, am I correct in assuming the instrument is measuring the same thing as engine torque (expressed in percentage of total), with the red bugs indicating some sort of maximum for the current conditions? Also, why are there three separate red bugs? Any help understanding this instrument is greatly appreciated!
admiki Posted September 13 Posted September 13 Yes, it should say ratio. I am not sure what those numbers mean, but they are not percentage. @AeriaGloria might help with that. IDK if you noticed, but red marks move up and down, depending on environmental conditions (altitude, temperature, humidity). From bottom, marks represent cruise power, max continuous and max allowed. OTH, going over max allowed will not do anything except drooping your rotor. According to manual, you can fly up to 60 minutes with collective under your armpit. I did test it once, went a bit over 60 minutes with nothing going wrong and then got bored and jumped out. 1
Cgjunk2 Posted September 14 Author Posted September 14 15 hours ago, admiki said: Yes, it should say ratio. I am not sure what those numbers mean, but they are not percentage. @AeriaGloria might help with that. IDK if you noticed, but red marks move up and down, depending on environmental conditions (altitude, temperature, humidity). From bottom, marks represent cruise power, max continuous and max allowed. OTH, going over max allowed will not do anything except drooping your rotor. According to manual, you can fly up to 60 minutes with collective under your armpit. I did test it once, went a bit over 60 minutes with nothing going wrong and then got bored and jumped out. Thanks for the info! Yes, I've noticed the bugs moving throughout the flight. Hopefully somebody can provide more info on what the number scale means. It's interesting that the manual indicates you can fly with full collective for 60 min. Does this apply to the real thing as well? I remember a few years ago reading about a brand new mi8 on it's delivery flight that ended up shearing the main rotor shaft. It seemed like the accident was due to flying with too much torque, for too long, at high gross weight. I never found much source information on that accident, and actually I'm not even sure it happened lol.
Akiazusa Posted 19 hours ago Posted 19 hours ago (edited) "The Engine Power Indicator is a tool to measure the equipment used to control engine power. Monitoring and control of the engines is based on the measurement of the compressor’s outlet air pressure, whose value is indicated by the two yellow markers on the vertical scale. These are then compared to the central red markers on the scale that represent different engine operating modes. The position of these mode markers is proportional to the ambient air pressure and temperature. On the central index there are three red markers: “В”, “Н”, “К”. These correspond to the compressor’s outlet air pressure at takeoff, maximum continuous, and cruise modes. To control the operation of any mode, it is necessary to compare the position of the yellow index markers with the red mode marks (В, Н, К) on the scale. Compressor outlet air pressure scale. Scaled from 5 to 10 kgf/cm2. One division equals 0.5 kgf/cm2." Those 3 bugs: o O – takeoff mode: 6min for normal (u can extend this for emergency conditions or when one engine is inoperative) o Н – maximum continuous mode: 60 min for normal o К – cruise mode:no time limit Also idle power has a 20min time limit My personal understanding of those limits are they are designed to extend the service life of the engines(material degradation or something),nothing really happens if u don't follow those time limits in DCS. (But in the sim u still can cause damage to the engine if u overheat the oil or overtorque them) Edited 18 hours ago by Akiazusa 1 Are you going to Scarborough Fair?
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