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Status Updates posted by Wadim

  1. Стоп, ты у меня записан Лёша. 
    А понял, Алексей...
    Прощу прощения - ошибся.

  2. What is ETL?

    1. Show previous comments  4 more
    2. cw4ogden


      Yes, I am familiar are used to teach this.


      It would be like if fixed wing aircraft simulation that power on stalls below the critical angle of attack.   Just because you pulled the stick too far back.  Yes in some circumstances that can cause a stall.  But not all.


      Much like dropping the collective in forward flight, I can pull back on the stick as hard as I want until I exceed the critical angle of attack.


      I have to be in the aerodynamic realm it occurs, AOA 15 degree or whatever based on airframe and load out etc.


      Yes you are in the danger area for an accelerated stall, but until you exceed that critical angle of attack, the phenomenon should not occur.


      VRS in DCS is much the same, I can get into it In regime’s of flight that are unrealistic due to everything I’ve explained. 

      your VRS may be modeled perfectly.  It may be exactly right, but that means the ETL airspeed is off, and the bug belongs elsewhere.


      Or it implies the Mi-8 Transitions through ETL at a very high speed.  And I can’t find mention of this in real life.

       I don’t know the answer. But I have demonstrated what is wrong with the flight model.  

      And that is being susceptible to VRS under flight conditions it can’t exist, unless the mi-8 ETL transition airspeed is very high.


      That is all I’m saying.


      The mi-8 module is a fantastic helicopter simulation.  But I think it is off with respect to VRS or ETL transition air speed.  Or there’s something else going on that no one else can explain to me.

    3. Wadim


      ETL depends on mass, wind, air temperature.
      On average, it is 45-50 km / h.
      Anything below this speed can lead to the vortex ring regime at vertical speeds from 4 to 10 m / s.


    4. cw4ogden


      Yes, it is a given all of this will fluctuate with environmental factors and adding weight.  

      But the susceptibility should scale from slightly susceptible at that upper range to very susceptible at zero forward airsieed.


      And being heavily loaded reduces your susceptibility, because you have to push more air down faster at higher gross weights.  

      Your available power margins to recover are smaller so yes, very dangerous stuff,  but you will be LESS likely to encounter VRS heavily loaded than unloaded.

      putely because you have to push more air down to stay aloft, thus requiring a higher rate of descent to induce Vortex state. 

      it is not much difference in reality, but is measurable and in the Mi-8 data on my English  thread.  

      can link if you want to see what I mean.  

  3. Макс, не тупи.
    Ответ не тебе был...

    1. МаксиM


      на мой вопрос тоже ответ был

    2. МаксиM
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