Any ideas what would cause this?

cyrusdvirus

http://www.independent.ie/video/video-have-you-seen/the-moment-a-rescue-helicopter-shuddered-apart-on-landing-3030751.html


Looks like a blade imbalance or something..... I know the caption says on landing, but if the Jesus nut was loose or there was a cracked blade could it cause this on take off?

Dogwatch

gatecrash wrote: »

http://www.independent.ie/video/video-have-you-seen/the-moment-a-rescue-helicopter-shuddered-apart-on-landing-3030751.html


Looks like a blade imbalance or something..... I know the caption says on landing, but if the Jesus nut was loose or there was a cracked blade could it cause this on take off?

Ground resonance perhaps??

Stovepipe

Not ground resonance. I'd say a blade imbalance.

regards
Stovepipe

cyrusdvirus

Now i don't know much about helicopters (apart from the fact that they can't actually fly, they just vibrate so much that the ground rejects them:D;):p) But i would have thought that you won't fly very far with a blade imbalance?...

I know it is the Indo, and far be it from me to mention the word 'sensationalism' but i'd doubt very much that this 'rescue helicopter' was out rescuing anyone.

triggermortis

Definitely ground resonance. Blade imbalance wouldn't be that bad unless half of one of the blades had failed and seperated

Dogwatch

http://news.sky.com/home/strange-news/article/16176212


This report says ground resonance. Will have to wait for the report.

TW Mr Tayto

I think you're both right.
Ground resonance is caused by an out of balance condition.

The heli might have encountered ground resonance after having a blade imbalance and the buffering system in the skids exaggerated problem leading to complete destruction.

Buffman

Reminds me of the video of the CH-47 test.

https://www.youtube.com/watch?v=-LFLV47VAbI

AlekSmart

Could it be a transmission failure ?

Perhaps a cardan shaft or universal joint coming asunder ?

Scary to watch !!!