I talked to my friend who is a helicopter tech in the military, and he said they showed this video in ground training class, this is a demonstration to show how much vibration is in the rotors when the chinook is mounted to blocks, without the shocks and wheels, the shocks and wheels have a control system that counteract this frequency. Basically it shows what would happen if the tire pressure is off, tire pressure is most important.
wow it broke up at really low speed, the resonant forces must be great. Makes you wonder if only air is creating the lift and not gyroscopic forces too ?
@EnterTheKmylo There are many different types of materials used in the Chinooks blades.. each serving a purpose. They are... Fiberglass, Kevlar, Titanium, Nickel, Nomex Honeycomb and Wire Mesh.
actually its because when the frequency of the simple harmonic motion of the blades is coherent with the ground frequency of the helecopter a huge force is exerted on the body. this is not a problem in the air hover due to the FUCKWIT who didnt tighten the anchor cabe this fuck up resulted
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
yes, that is usually the first step in the recovery. after that it is shutting down the engine and applying a rotor brake (if installed). it usually happens when the aircraft is tied down and there is no give.
very cool frequency reverb modulation untill it chinook it self to bits,,so the resonance is transferred through the choppers body by being held down..
Oh, do you mean that a malfunctioning helicopter can actually shake itself apart like this?! I had assumed that this was an earthquake simulation test!
If I ever go up in a helicopter, I want to see the Preventive Maintantenance Checks and Services procedure performed in person and check maintenance logs myself prior to!
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 most the rear gearboxes do this on the old model which is why the tail splits, they really need to make a more triangular aft section as the support struts can't take full load at full speed, but you americans don't know how to fix stuff, if it breaks you get a new one.
@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.
that's great thanks
Odyssee2012 1 week ago
and i thought that plane are unreliable ....
samsoulee 1 week ago
...annnnd cut! Ok, I think we'll use that. Don't think we can do a re-take at the present time...
smacman68 2 weeks ago
Front blade is still good!
drewbehr 2 weeks ago 2
i like how there is one intellient top comment, then have"Shake Dat Ass"
soulchain247 2 weeks ago 2
Awesome vid - glad this happened in a controlled environment!
hogey74 2 weeks ago
If the vehicle's a rockin', don't come a-.... oh shit!!
TheArfdog 3 weeks ago
Wow you can actually see just how out of phase they are towards the end there lol
samus989 3 months ago
That must be some dynamite sex in there!
teenangst1318 5 months ago
Is that a bad thing to happen?
winterka100 5 months ago
depois que desmancha, fica parecendo um coco.
MrLeandro1985 5 months ago
I talked to my friend who is a helicopter tech in the military, and he said they showed this video in ground training class, this is a demonstration to show how much vibration is in the rotors when the chinook is mounted to blocks, without the shocks and wheels, the shocks and wheels have a control system that counteract this frequency. Basically it shows what would happen if the tire pressure is off, tire pressure is most important.
bigtank2185 7 months ago
@bigtank2185 your friend needs to be shot for talking about this.
tyga42 6 months ago
it looks like a hilariously concerned face having its nose ripped off
donjo19 1 year ago
wow it broke up at really low speed, the resonant forces must be great. Makes you wonder if only air is creating the lift and not gyroscopic forces too ?
MattBlytheTheOne 1 year ago
I want one of those blades
thercpoop 1 year ago
what are the blades made of?
EnterTheKmylo 1 year ago
@EnterTheKmylo There are many different types of materials used in the Chinooks blades.. each serving a purpose. They are... Fiberglass, Kevlar, Titanium, Nickel, Nomex Honeycomb and Wire Mesh.
psygn0sis 1 year ago
actually its because when the frequency of the simple harmonic motion of the blades is coherent with the ground frequency of the helecopter a huge force is exerted on the body. this is not a problem in the air hover due to the FUCKWIT who didnt tighten the anchor cabe this fuck up resulted
stuffthatiscool 1 year ago
this is what happens when you let women drive
TOYDOLLSKID 1 year ago
Chinooks look like frogs from the rear.
atllex 2 years ago
thats actually there nickname in the fleet
torpedo0126 1 year ago
made in china
rednight666666 2 years ago 2
Tear it up!
LLarjo 2 years ago
there goes our tax dollars?
hydrobot2003 2 years ago
siinäpäs on olleet oikeat tuherot rakentamassa helikopteria
mrmakemakkara 2 years ago
Comment removed
ve2zzz 2 years ago
There goes a perfectly good Chinook...
Burgerbob22 2 years ago
Yup looks safe now lets sell em and make money! "YEAH!!!!"
FlyForHeroOfficial 2 years ago 4
Is this part of Air France fleet as well?
BowHunterAz08 2 years ago
Armonic REsonance is terrible!!!
emipusa 2 years ago
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
codyj702 3 years ago 18
We can clearly see an important imbalance on the aft rotor just before major failure.
Codyj702, could the pilot prevent that by TAKING-OFF instead of cutting down the motors ?
ve2zzz 2 years ago
When ground resonance is encountered you immediatly pull in pitch to become airborn
larbear1001 2 years ago 2
yes, that is usually the first step in the recovery. after that it is shutting down the engine and applying a rotor brake (if installed). it usually happens when the aircraft is tied down and there is no give.
torpedo0126 1 year ago
This comment has received too many negative votes show
Thats caused by poor struts, bad dampners, low tire pressure, and a hard surface.
Mystery110 4 years ago
thats cased by rosie odonnel rocking back and fourth u idiot
ptscao 3 years ago 4
lolz it looks like a frog whith something sticking out of its head from the back
ravenfan205 4 years ago
Shake dat ass.
KingdomAwaits 4 years ago 18
It appears the rotors were neutral - not lifting, so how could this be rotor wash resonance?
robertgift 4 years ago
What's really crazy here is that the engine is turned off early on (you can hear it wind down) yet it STILL destroys itself!
VideoJunkei 4 years ago
That's quite cool and scary at the same time.
jsd23 4 years ago
Is this the same concept as the bridge that oscillated until it collapsed?
ginet18 5 years ago
fuchenah
TheBedfordboyz 5 years ago
very cool frequency reverb modulation untill it chinook it self to bits,,so the resonance is transferred through the choppers body by being held down..
twinboost 5 years ago
and that's how they make crop circles
jocksBASS 5 years ago
indeed
arrowgiambi 4 years ago
Bravo!- you sure as hell don't see that every day!
ranchoroncho 5 years ago
laserbeak deploy
jocksBASS 5 years ago
Oh, do you mean that a malfunctioning helicopter can actually shake itself apart like this?! I had assumed that this was an earthquake simulation test!
If I ever go up in a helicopter, I want to see the Preventive Maintantenance Checks and Services procedure performed in person and check maintenance logs myself prior to!
spicedjellybeans 5 years ago
IN A WORD... NICE!
IBANEZDADDY 5 years ago
the rotors produce a frequincy equal to that of the planes natural frequency and this induces resonance on certain parts of the plane
sKunKeNsTeiN 5 years ago
it looks like its fuckin hard
cafuyoneverock 5 years ago
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
@squorch most the rear gearboxes do this on the old model which is why the tail splits, they really need to make a more triangular aft section as the support struts can't take full load at full speed, but you americans don't know how to fix stuff, if it breaks you get a new one.
tyga42 6 months ago
@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.
AccessAir 2 weeks ago
@squorch "such as uncommanded snap roll to inverted" < Yeah, that sounds like good fun....
CoDViP 5 months ago
I think it is a model... or is it not? How to know? The propellers bend instead of breaking.
CRCavazos 5 years ago
Dumbass...with the proper frequencies, sound can liquify metal.
tubeaholic 5 years ago
hey can you tell me what that is called if you know "the process of sound liquefying metal"?
swampghost 5 years ago
Great viewing!
dantheloyalroyal 5 years ago
ha! the power of resonance!!!!!! nice. first I thought that was a toy... LOL
drumhighguy 5 years ago
hmmmm
DanJackson123 5 years ago
Glad I am going to fly planes, not choppers.
gunraptor 5 years ago
that was pretty cool
Maverick4230 5 years ago
Them things have always been frikkin death traps..
They were death traps in Nam and they are death traps in Iraq.
They just now coming around to doing this test?
mungo23 5 years ago
Wow, what's going on here, exactly?
deisys 5 years ago
The vibration caused by propellers create points of resonance which are strong enough to break metal.
CRCavazos 5 years ago
Haha, weird yet neat at the same time, i find it funny how it tears itself apart.
Jigg007 5 years ago
Your tax dollars at work.
jacquemeihoffe 6 years ago