Mi8 Noob, help with VRS

[noisy_lightning]

Hi guys I am new to the Mi8 but have a fair bit of time with the Gazelle module. So far I love this bird even if it did take some time to get used to with hovering compared to the Gazelle.

 

My question is regards VRS, I understand the principles of getting out of it but seems like I have issues putting it into practice before I hit the ground. Are there any tell tales that VRS is about to be induced and specifically what's the best way to get away from it into forward flight?

[SnorreSelmer]

Only way I can think of is to dip the nose and hope you have enough altitude to get out. As for avoiding it, that's fairly easy: when nearing translation, make sure you never (NEVER) descend faster than 3m/s. Doing the final slowdown in ground effect is a good way to do it, then you don't need to descend much to get wheels on the ground.

 

Sent from my Nexus 5 using Tapatalk

[Pocket Sized]

When you slow down and drop out of translational lift there is a "burble" (momentary vibration). When you see this, it's a pretty good indicator that you have to be REALLY careful descending. As SnoreSelmer mentioned, it's best to get really low before entering a hover.

 

Also, recovery. Don't hesitate on the cyclic, use full deflection if needed. Pull lots of collective. Ideally keep the RPM above 86% to keep your generators (and autopilot) alive.

[Looney]

When entering translational lift, it is important to add copious amount of collective to keep from entering VRS, you can easily go from 25% to 70% in order to stabilize her.

 

Once in VRS adding more collective doesn't help, it makes it even worse, use the cyclic to gain either forward or sideways momentum to get into " fresh" air and add collective to slow your descent rate, hopefully in time before hitting the ground.

[Paganus]

After entering VRS, forward air speed is the only cure.

 

As you slow yourself into a hover you should be adding collective to control descent rate.

[Pocket Sized]

Once in VRS adding more collective doesn't help, it makes it even worse

 

That's why I mentioned the aggressive cyclic input. If you can get the lift vector offset from vertical (by pitching or banking) adding collective will yank you away from the vortex.

 

But yes - if you are level and descending vertically in VRS, collective doesn't halt the descent. (It can give increased control authority for the aforementioned recovery procedure though)

[Holton181]

Another method to get out of VRS worth trying is the "Vuichard Recovery" method.

Don't know if it works in DCS, haven't tried it myself yet.

Described in the attachment by Tim Tucker.

 

(I only have the pdf on my phone, not the link to the source, but Google is your friend...)

 

Edit:

Problems attaching through tapatalk...

tmp_12066-Flying Through the Vortex - Tim Tucker.pdf-268614332.zip

Edited February 28, 2017 by Holton181

[Cibit]

Another method to get out of VRS worth trying is the "Vuichard Recovery" method.

Don't know if it works in DCS, haven't tried it myself yet.

Described here by Tim Tucker:

https://cloud.tapatalk.com/s/58b5cb550139d/Flying%20Through%20the%20Vortex%20-%20Tim%20Tucker.pdf.zip

 

 

(I only have the pdf on my phone, not the link to the source, but Google is your friend...)

 

I have done this in the Mi-8 and its great if you time it right, if you don't you just end up crashing sideways instead. But it definitely works in DCS and is a skill worth mastering;)

[noisy_lightning]

Thanks for the tips, I have been putting it into practice tonight and it's slowly coming together. The biggest issue is moving from the sensitive Gazelle (cyclic wise) to the Mi8 but some tweaks to the curves have helped huge amounts there.

 

Sent from my ONEPLUS A3003 using Tapatalk

[BitMaster]

Another method to get out of VRS worth trying is the "Vuichard Recovery" method.

Don't know if it works in DCS, haven't tried it myself yet.

Described in the attachment by Tim Tucker.

 

(I only have the pdf on my phone, not the link to the source, but Google is your friend...)

 

Edit:

Problems attaching through tapatalk...

 

Will read tonight ! Thank you !

 

 

Yeah, VRS in the Mi-8 LoL.

 

Take it slow and easy, ALWAYS one eyeball on the VSI, dont let it slip dowen faster than 2-3m/s or you are asking for a bad VRS.

 

Landing the Mi-8 straight down is possible if you obey the rules.

1: it doesnt go quick..its a SLOW descent

2: it shoudl be avoided 1st. place !

3: again..SLOW...if she drops 1 time too fast there is almost no way out !!!

 

 

I love the Mi-8 ! Best airframe there is for people like I am now LOL, I really dont need the A2A Furball anymore..haha :P