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Thread: Vuichard Recovery Technique - How to escape a Vortex Ring State

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    Supporting Member Vlerkies's Avatar
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    Vuichard Recovery Technique - How to escape a Vortex Ring State

    If you fly any of the choppers this will help make sense of how VRS bites.


    http://theairtacticalassaultgroup.com/forum/image.php?type=sigpic&userid=4036&dateline=1382347  940

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    Supporting Member Tinkicker's Avatar
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    Re: Vuichard Recovery Technique - How to escape a Vortex Ring State

    So use of tailrotor to slide out the side, instead of forward cyclic and dump the collective a fair bit as I do now?
    Getting into VRS is the number one killer for me in the Huey, usually trying to kill off too much speed and altitude at the same time. Sink greater than 750fpm and airspeed less than 15kts will usually do it when carrying a full load of troops into a hot LZ. Less than 750fpm will usually allow a save due to ground effect, provided there is still a little translational lift going on.
    Can't count the number of times I have listened to the turbine spooling down while looking at the earth tilted over through a broken windshield.
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    Supporting Member Vlerkies's Avatar
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    Re: Vuichard Recovery Technique - How to escape a Vortex Ring State

    In short

    not dumping the collective together with forward cyclic, which obviously works but the consensus is at lower levels of flight this technique will bleed much less altitude to recovery.

    The technique involves
    Recover power on the collective, followed by/or same time appropriate pedal (depending on rotor blade rotation CW/CCW, to keep it pointed straight) then cyclic slip out in the opposite direction to the pedal.
    Its a combination of the tail rotor pushing you to one side and the main rotor slipping you out of the vortex.
    Good explanation here
    http://www.rotorandwing.com/2015/09/.../#.VhytAlUrKUl

    Also discussed a while ago on Eagle forums here.
    https://forums.eagle.ru/showthread.p...light=vlerkies

    And as one forumite mentioned it was included in the Robinson Safety notices as 'essential' part of training.
    https://robinsonheli.com/wp-content/...2/rhc_sn22.pdf
    Last edited by Vlerkies; Sep-14-2017 at 14:00.
    http://theairtacticalassaultgroup.com/forum/image.php?type=sigpic&userid=4036&dateline=1382347  940

    If it's brown, shoot it down!

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