mi-8 VERY jerky/jumpy on takeoff in 2.0

[nigelmcelwee]

No that's not the source of problem.

 

Mi-8 hits the pole nearly at the end of the track. The jumpy attitude what Nigel is talkin about is there, before hitting the pole. Check the jumpy act in cockpit. You'll see it a lot of times.

 

I watched track again, and this problem reminded me a sticky ground issue that goes back to previous map. You may say "No! Irrelevant. This map is based on completely different an engine etc. You're right, but just saying...

 

In BlackSea map, when I wanted to move Su-25T very very slowly, for a moment the aircraft used to act exactly like this (what is seen in track). It was like that the aircraft didn't want to move. I told (complained) about this "bug", but they said that that was not a bug, it's related with friction or something... I couldn't remember the explanation exactly, because it wasn't reasonable for me.

 

Whatever, I don't know if my observation (bug I say) still exists in v1.5, but -again- this problem is similar to mine. The ground tends to hold and not leave aircraft.

 

ooooor, I'm talking nonsense, forget my post. :)

 

 

yes , thats what I was thinking. The ground does tend to hold the aircraft and not let it go which causes it to jump wildly. If I give it a lot of collective the chopper jumps right off the ground with no jerkiness. Its only when I slowly increase the collective. Maybe im increasing too slowly and the heli is goign up and down and catching the ground like Dev said.

[Weta43]

Turn off the brake and see if the plane 'castors' around as you add collective. If the ground is 'sticky', it won't.

[Rogue Trooper]

I may have seen this at initial take off when I first flew Navada, I am not sure. Something happened that may be similar to what you saw; a jumping effect for the cockpit only and it was quick and did not effect my ascent. I flew around for 2 hours and landed constantly but never saw it again on take off and it never affected normal flight. I have only flown the MI-8 once in Navada.

 

I should also add that he MI-8 is the only chopper with the excellent FOV percentage setting, I tend to set my max field of view to allow the top of cockpit window to be seen and the lowest portion of the lower centre window to be just in view when looking center forward, this setting allows a lot of side view at the same time.... could this be an issue?

Edited December 9, 2015 by Rogue Trooper

[nigelmcelwee]

Turn off the brake and see if the plane 'castors' around as you add collective. If the ground is 'sticky', it won't.

 

Yes the heli does castor around a bit...meaning the wheels get turned and I have to do one give the heli a little back and forth to get the wheels centered. But the jumpiness is still there. I noticed though if I add collective a little more aggressively the shaking doesnt happen. Only when I raise it very slowly as the heli starts to break ground.

[Flagrum]

Perhaps BST has ninja'ed in ground resonance effects? :o)

[Art-J]

OK, so just to be sure - which shaking are we talking about here. The big amplitude one near the end was definitely caused by hitting the structure (as even described in post track briefing). The small amplitude one during first takeoff attempt - that we can discuss.

 

There's another option which should be considered here - the wind. I don't know the exact speed treshold BST programmed for "transition shaking" in latest update, as in normal flight the vibration appears just before speed indicator starts actually working. In the track mission Nigel posted, there's a 7m/s wind though - might be just enough to trigger this new effect.

 

I'd recommend making a few test vertical take-offs with no wind - on my machine at least, they don't cause any vibrations at all (until I start flying forward that is).

[Devrim]

None of them.

[nigelmcelwee]

"transition shaking" in latest update, as in normal flight the vibration appears just before speed indicator starts actually working. In the track mission Nigel posted, there's a 7m/s wind though - might be just enough to trigger this new effect.

 

That is an interesting observation. Perhaps the wind blowing into the pitot tubes is enough to trigger this effect. I will test this out when I get home!

 

***EDIT***

So I tested with no wind and sure enough, the shaking disappeared. It does appear that the strong wind is triggering the helicopter to shake as if it was in the translation effect.

Edited December 11, 2015 by nigelmcelwee

[gospadin]

***EDIT***

So I tested with no wind and sure enough, the shaking disappeared. It does appear that the strong wind is triggering the helicopter to shake as if it was in the translation effect.

 

All that matters is the speed of the helicopter relative to the wind when discussing translation effect.

 

With enough wind, the helicopter may appear to be hovering when in reality it's experiencing translational lift.

[slimbizza]

How do I install Mi-8 for DCS 2.0? Downloading it, it asks for version 1.2... In game, I cant find it on the module's to install.

[gospadin]

How do I install Mi-8 for DCS 2.0? Downloading it, it asks for version 1.2... In game, I cant find it on the module's to install.

 

In 2.0 you need to use the module manager (upper left button on main screen)