Helicopter falling apart

[pjsny78]

This reminded me of the previous thread about if you can cause damage by pulling on your prop. Could this have been done by someone pulling on the props?

Or the significance of owners to get their props balanced. I am getting myne balanced Saturday. 

Anyway it's interesting.

 

http://news.yahoo.com/blogs/technology-blog/watch-helicopter-destroyed-physics-without-even-leaving-ground-224458312.html

 

 

[aviatoreb]

Quote: pjsny78

This reminded me of the previous thread about if you can cause damage by pulling on your prop. Could this have been done by someone pulling on the props?

Or the significance of owners to get their props balanced. I am getting myne balanced Saturday. 

Anyway it's interesting.

 

http://news.yahoo.com/blogs/technology-blog/watch-helicopter-destroyed-physics-without-even-leaving-ground-224458312.html

 

 

[Antoni Deighton]

Dynamic resonance. It can happen on helicopters with semi-rigid rotor systems (usually with 3-blades). A bad landing can result in the blades getting out of sync (lead lag).  The correct action is to lift off, let the blades resync, then set down again. The report said that the pilots were experiencing airborne vibration, so perhaps this wasn't possible? There are a few videos on YouTube, including one of a Chinook vibrating itself to bits.

I'm glad everyone inside this one was okay.