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The problem with the shape of the rotor little bird is convex rotor in flight
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Pokud poletíte s Little birdem (AH-9 a MH-9) Pak vidíte že váš rotor má konvexní zakroucení

If you fly with Little Bird (AH-9 and MH-9) Then you see that your rotor has a convex twist


Legacy ID
Steps To Reproduce


  1. Spusťte editor
  2. Vložte Vojáka a pak AH-9 či MH-9
  3. Dejte preview
  4. Jako voják vlezte do vrtulníku
  5. Teď vzlétněte
  6. Nyní pokud jste ve vzduchu pak vidíte konvexní tvar rotoru.


  1. Start the editor
  2. Insert the Soldier and the AH-9 or MH-9
  3. Put preview
  4. As a soldier, head into the helicopter
  5. Now soars
  6. Now, if you're in the air, then you see the convex shape of the rotor.
Additional Information

Additional information:

Game: Steam Arma III. Alpha Lite
Version: 0.5.102571 steam standard arma3.exe
Tested on steam arma3.exe on steam

My opinion for repair:

Please make it as real little bird:

Event Timeline

DanWerwolf edited Additional Information. (Show Details)
DanWerwolf set Category to Visual-Vehicles.
DanWerwolf set Reproducibility to Always.
DanWerwolf set Severity to Minor.
DanWerwolf set Resolution to Fixed.
DanWerwolf set Legacy ID to 621072371.May 7 2016, 10:27 AM

This happens to me as well, but I also have a problem with the rotor not spinning properly while in flight. sometimes it will go in reverse, completely stop, or just be incredibly slow moving.

mewle added a subscriber: mewle.May 7 2016, 10:27 AM
mewle added a comment.Mar 10 2013, 4:33 PM

the reverse and stop effect are frame rate issues are they not?
I ask because I wasn't sure if above a certain RPM the rotor is modified to blur?

zimms added a subscriber: zimms.May 7 2016, 10:27 AM
zimms added a comment.Mar 10 2013, 5:30 PM

The stop/reverse spin happens because of the frame rate, it's called aliasing. I'm sure you have seen movies where the wheels of a car seem to rotate backwards at a certain speed. That's basically the same thing.

Zimms is right, and as mewle said the blades should turn into blur as in Ka-60 (IIRC). But for some reason they don't.

What I see in my game are rotor blades being bended downwards at the beginning and then starting to flatten out as the rotor spins up. During flight, the rotor blades are bended upwards, which is what I see on the video. Maybe I just dont understand what you mean by "convex" in this situation.

If by convex he means coning of the rotor (bending blades upwards) it's normal state and it depends on rotor torque - it's most apparent during takeoff right before liftoff or when applying high amount of collective input.

Real problem right now is that there are no dynamics on the rotor shape while in flight.

As other reporters noted in the comments, the upward-bending shape is realistically correct but only for takeoff/landing phases and/or generally when high amount of torque is applied (basically pulling the thrust lever at the higher state along with collective lever).

There should be, instead, a "transition" between flat and convex shapes based upon the current amount of torque.
Physx simulates that effects quite well, if applied.

This is realistic and is called blade coning, it does not depend on rotor torque, it depends on the weight of the aircraft, the load (G-force) and the amount of lift being produced by the blades.

Well the more lift airfoil generate the more drag it generates, thus while the lift is increased so is the torque (because of increased drag), so it does depend on the torque - it's just the matter of perspective.