Mi-8 tail rotor blade angle reversed

[Airmage]

Hi, just noticed something about the tail rotor of the mi-8: the blade angle seems to me that it is reversed. Am i not seeing right or there is indeed a mistake? Check screenshots.

[Penshoon]

Nose swings left, tail goes right, in order to push the nose right, tail has to be pushed left using right pedal. I'm guessing pedals is centred in this photo?

[Airmage]

Yes, pedals centered; exactly my point: tail has to push left, but look carefully and see it pushes right. Rotor tail blades are reversed.

[Sid6dot7]

The tail rotors upper part turns towards you (clockwise spin, when looking from the left), so it pushes in direction of the tail boom.

Edited September 27, 2016 by Sid6dot7

[Airmage]

The correct airflow is toward the tail boom like you say, but look at the blades: on a CW spin from the left view, they push opposite the tail boom.

 

Either i'm crazy or nobody else sees this? Omg...

[Airmage]

For the air flow to be towards the tail boom, the trail edges of the blades should be towards the boom, and they are not.

 

This pic shows the correct blade angle:

 

https://i.ytimg.com/vi/VmA61GF1RHU/maxresdefault.jpg

 

Same config on this Hind:

 

http://www.militaryaircraft.de/pictures/military/helicopter/Mi-24/ILA2014/Mi-24_7353_ILA2014_0225_800.jpg

 

Anyway, i'm sure this was not always like this, but only after some recent updates, my guess.

[gospadin]

why does "pedals centered" matter?

[Art-J]

Because with pedals centered blade pitch should not be in "hard left rudder" attitude, as can be seen on the screenshots. Airmage, You're not crazy, looks like indeed they're reversed.

 

One thing that crossed my mind was - maybe tail rotor blades being on some kind of a pitch stop when the heli doesn't run and there's no hydraulic pressure (like in Hamilton Standard airplane props). However, pictures of the real things posted above, show that's not the case.

 

We have to remember, though, that full rotors animations, as in UH-1 module, are still not present in Mi-8, so maybe they'll fix all of it later.

[Sid6dot7]

Does that help? Maybe the tail rotor animations aren't implemented yet, as they don't seem to change for left/right rudder.

Edited September 27, 2016 by Sid6dot7

[Airmage]

Does that help? Maybe the tail rotor animations aren't implemented yet, as they don't seem to change for left/right rudder.

 

Is this for CW spin from left view?

 

Because if it is, you must recheck your aerodynamics knowledge...sorry.

 

And for implementation, it was done correctly some time ago. I just noticed this flaw recently, i has not always been like this.

Edited September 27, 2016 by Airmage

[Sid6dot7]

Yes, the blade moves down, so the airflow vector points upwards.

[Art-J]

Airmage, chillout, Sid's screen with vectors proves You point - the lift vector is pointing the wrong way.

 

And yes, there's no pitch animation in this module at the moment.

[Sid6dot7]

Because if it is, you must recheck your aerodynamics knowledge...sorry.

 

Erm the green arrow is the clean airflow hitting the blade and get's redirected away from the tail boom due to blade interaction. Never said you were right nor wrong.

Edited September 27, 2016 by Sid6dot7

[Airmage]

This screenshot is from 30 Oct 2015, where blade angle looks correct. I don't understand why this was changed to incorrect...Next one From Feb 2016 also, untill some recent update i think.

[AlphaOneSix]

The picture in your original post is what full left pedal looks like. Full left pedal should be just over 6 degrees of pitch. Odd...

 

For reference, centered pedals should be roughly 8 degrees...the other way.

Edited September 28, 2016 by AlphaOneSix

[Airmage]

The picture in your original post is what full left pedal looks like. Full left pedal should be just over 6 degrees of pitch. Odd...

 

For reference, centered pedals should be roughly 8 degrees...the other way.

 

The screenshots were made on startup, controls untouched. This issue fustrates me since Mi-8 is my fav module.

[AlphaOneSix]

Just a wild guess, but if blade pitch animations are being worked on, it may be that they are currently stuck at full left pedal pitch until the feature is more complete? I have no idea I'm just tossing that out there.