Scary situation on rooftop-helipad
Thread Starter
Joined: Feb 2006
Posts: 1,067
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From: On the big blue planet
Scary situation on rooftop-helipad
A B412 encontered severe vibrations after unloading a patient on the rooftop of the Innsbruck/Austria hospital.
Video:
Video: So trudelte der Heli am Klinikdach - oesterreich.ORF.at
skadi
Video:
Video: So trudelte der Heli am Klinikdach - oesterreich.ORF.at
skadi
Avoid imitations
Joined: Nov 2000
Aviation Qualifications: ATPL
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From: Wandering the FIR and cyberspace often at highly unsociable times
that is much more than simple ground resonance....
Resonance needs one vital thing to be classified as ground resonance...
I.e. The ground. This was airborne!
Looks like a partial loss of main rotor control.
Joined: Apr 2010
Posts: 1,184
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From: Lost again...
Agree that it does not look like ground resonance. Bearing in mind that there appears to have been loading / unloading going on, could it have been an inadvertent control input or obstructed control??
After the lift-off there seems to be a phase of more controlled flight followed by a second big deviation???
Very scary...
OH
After the lift-off there seems to be a phase of more controlled flight followed by a second big deviation???
Very scary...
OH
Joined: Jun 2001
Posts: 506
Likes: 1
From: Europe
I bet there was a problem with the pilot and never in life could this be called ground resonance.
Looks to me like the pilot wasn't able to grab the controls right for a time. Reallys sure he and not a pax was initially on stick and pitch? May be they unloaded the doc and leaving the patient alone on the controls?
BTW, why do they unload the ship in the middle of a rooftop on full power?
Looks to me like the pilot wasn't able to grab the controls right for a time. Reallys sure he and not a pax was initially on stick and pitch? May be they unloaded the doc and leaving the patient alone on the controls?
BTW, why do they unload the ship in the middle of a rooftop on full power?
Joined: Sep 2003
Posts: 2,081
Likes: 189
From: Redding CA, or on a fire somewhere
Almost looks like a red blanket gets sucked out of the open door on the right and into the blades. I blew it up but could not tell clearly.
Edited to add: I slowed it down and now could look like red smoke....
Edited to add: I slowed it down and now could look like red smoke....
Last edited by Gordy; 10th March 2011 at 14:41. Reason: added some more
Joined: Jan 2009
Posts: 821
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From: no comment ;)
Try like this.....
use: In externem Player öffnen
than put 200% size in Win media player
than slow speed down to 0,5
than you can see that all started with ground resonance
than main rotor rise up in front, and airframe follows
and after that was "fight" with pedals after collective wild rise up
use: In externem Player öffnen
than put 200% size in Win media player
than slow speed down to 0,5
than you can see that all started with ground resonance
than main rotor rise up in front, and airframe follows
and after that was "fight" with pedals after collective wild rise up
Joined: Feb 2005
Posts: 673
Likes: 1
From: On the green bit near the blue wobbly stuff
Not familiar with the type - dont know how it flies without the helipilot engaged, but it does appear to behave a lot like many aircraft do when they take off with no stabilisation.
This would seem to fit with the ground resonance theory - if resonance hits, you would take off pretty quick, probably without time to engage helipilots, let alone do any other checks!
This would seem to fit with the ground resonance theory - if resonance hits, you would take off pretty quick, probably without time to engage helipilots, let alone do any other checks!
Joined: Sep 2005
Posts: 768
Likes: 45
From: Montreal
He took off without closing the doors or waiting for the people standing around to move aside, or turning the helipilots on. Ground resonance could be a reason for him doing that. Maybe next time he'll leave the hp's on, and maybe check up slightly on the collective instead of keeping it all the way at the bottom.
412 isn't that bad without the hp's turned on, no worse than a 76. You can usually hover both without scaring anyone and reach down and turn them on. Helps if you've done it once or twice before.
412 isn't that bad without the hp's turned on, no worse than a 76. You can usually hover both without scaring anyone and reach down and turn them on. Helps if you've done it once or twice before.
Joined: Nov 2007
Posts: 11
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From: Austria
Severe Incident on rooftop helipad Innsbruck (Austria)
On 9th of March a Bell 412 of HELIAUSTRIA (Knaus) had a severe incident after landing on UNI Klinik Innsbruck. Does anyone of the community have an idea, what the reason for this rodeo could be? Media say something about "Ground ressonance". YouTube - hubi neu-1_146487[1].wmv
Joined: Jun 2010
Posts: 2,422
Likes: 3
From: Milano, Italia
.
From the clip there is zero evidence of ground resonance.
The take-off (if you can call it that) lacked any yaw control and the initial cyclic response was inappropriate leading me to suspect that a) this was an unplanned take-off (collective inadvertently manipulated) or b) the pilot allowed his 7 year old son to make his first attempt at flying a helicopter.
S.
From the clip there is zero evidence of ground resonance.
The take-off (if you can call it that) lacked any yaw control and the initial cyclic response was inappropriate leading me to suspect that a) this was an unplanned take-off (collective inadvertently manipulated) or b) the pilot allowed his 7 year old son to make his first attempt at flying a helicopter.
S.