Ground Resonance - Rear View
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Uploaded by squorch on Feb 27, 2006
CH-47 during a ground test. This was on purpose.
- 126 likes, 7 dislikes
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Uploader Comments (squorch)
Top Comments
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series of shocks to the landing gear can pass through to the rotor disk and cause an imbalance in the rotor system.The imbalance is possible because multi-bladed helicopters include lag-lead hinges at the rotor hub to reduce stresses in flight. Under normal conditions, all blades are spaced at equal angles. Shocks to the rotor mast and hub can cause an imbalance if they are sufficiently violent
3 years ago 18
All Comments (75)
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that's great thanks
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and i thought that plane are unreliable ....
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...annnnd cut! Ok, I think we'll use that. Don't think we can do a re-take at the present time...
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Front blade is still good!
6 days ago 2
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@tyga42 Hey now, dont preach to us Americans about not fixing things..Last time I checked, every time an Airbus needs heavy maintenance its scrapped...Whilst a DC9 can keep on flying for 40 plus years. Besides, when things were made in the USA, they lasted. Now that China makes everything its disposable cheap crap..LOL.
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i like how there is one intellient top comment, then have"Shake Dat Ass"
1 week ago 2
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Awesome vid - glad this happened in a controlled environment!
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If the vehicle's a rockin', don't come a-.... oh shit!!
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Wow you can actually see just how out of phase they are towards the end there lol
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That must be some dynamite sex in there!
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This is a phenomenon inherent in ALL fully articulated rotor systems that are chained to the deck. If a blade gets out of track and begins to resonate with the ground, the rotor disk's CG will rapidly spiral outward, resulting in the damage you see above.
The solution?
Take off.
This particular bird had experienced strange control anomalies (such as uncommanded snap roll to inverted), which is why it was struck and used for this test.
squorch 5 years ago 19