preflight / after APU start : Ka shakes and capsizes

[Tozzifan]

Hi,

although searching this forum, having seen a few times the training video, following the in-deep manual checklist :cry: :) , willing to do a total start-up with a created mission, after the APU launch, rotor blades start turning and after a while the Ka50 begins to tremble (the external view shows truncated rotor blades), then the aircraft starts moving sideways and finally capsizes (of course, Cougar system is perfectly centered and collective is set to idle - I use realistic inverted Z axis calibration)

 

please, what di I miss, to keep this beast steady when awaken?

 

thanks

[EagleEye]

Hi,

although searching this forum, having seen a few times the training video, following the in-deep manual checklist :cry: :) , willing to do a total start-up with a created mission, after the APU launch, rotor blades start turning and after a while the Ka50 begins to tremble (the external view shows truncated rotor blades),

What caused the blades to being broken/truncated? Are they ok (external view) when you start the mission?

A attached track-file would always be helpful.

[Tozzifan]

What caused the blades to being broken/truncated? Are they ok (external view) when you start the mission?

A attached track-file would always be helpful.

 

sorry, I'm still not used to track attaching, here.......

CRASHstart.trk

[winz]

I'm unable to check track here, but I is your collective lowered?

 

edit: never mind... I need reading lessons :)

[mvsgas]

Did not watch you full track but their is to much wind. Look at your rotor blades before start. Not even RL helicopter would be able to fly in that. What is the wind speed?

[Tozzifan]

Did not watch you full track but their is to much wind. Look at your rotor blades before start. Not even RL helicopter would be able to fly in that. What is the wind speed?

 

you're right! :thumbup:

 

I planned start-up missions using all stock default weather variations: I didn't notice that some of them they added quite a turbulence (19m/s and beyond) ... or maybe it was me carelessly tweaking ... probably it's been the second option :)

[mvsgas]

Hope this helps

[Hakon]

It has to be the wind. Because the APU itself dosent move the blades. As soon as you loose the rotorbreak, the wind causes the Blades to turn. Soner or later the blades hit each other ..........

[EbonySeraphim]

It has to be the wind. Because the APU itself dosent move the blades. As soon as you loose the rotorbreak, the wind causes the Blades to turn. Soner or later the blades hit each other ..........

What was confusing though is that the rotor blades seemed to pick up an uncanny amount of speed after two of them already broke off. As soon as the rotor brake was released, the blades were rotating slowly. After several seconds two of them collided with each other, cutting them in half. Right after that happened, they started accelerating even faster rotationally, almost as if one of the engines was turned on.

 

I have some college level physics in my background (though not high, the little I have, I understand well), and I couldn't quite wrap my head around why, without engine power, the blades were able to accelerate to the point of picking up the whole chopper. Anyone have any ideas about this or should we just say "the sim isn't 100% perfect, and those are unflyable conditions anyways?" Though I couldn't, or don't know how to, look at the wind speed settings Shkval was showing 85-88kph while the chopper was steady on the ground, which I'm guessing was entirely due to the wind speed.