Anyone for Ground Resonance?
Joined: Sep 2002
Aviation Qualifications: CPL
Posts: 4,721
Likes: 637
From: Great South East, tired and retired
**Sigh** when will the Facebook generation learn to hold the phone horizontal to include a heck of a lot more picture.
That must have been an exciting ride for the pilot!
That must have been an exciting ride for the pilot!
Joined: Feb 2006
Posts: 557
Likes: 27
From: At home
Shame about the shakycam video, but talk about resonating to destruction 
https://youtu.be/BwYcAwv-m3w
https://youtu.be/BwYcAwv-m3w
Accident info
Joined: Sep 2002
Aviation Qualifications: CPL
Posts: 4,721
Likes: 637
From: Great South East, tired and retired
Could be crappy reporting, like in Oz, and the tailboom was shaken off by the resonance? The rattling around didn't do anything for the landing gear either.
Joined: May 2002
Aviation Qualifications: ATP+Mil
Posts: 18,633
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From: Downeast
The Chinook in the video was the victim of some Army Aeronautical Engineers who were test running the aircraft by remote control prior to shooting at it for ballistic tolerance testingl
Sadly...they chained the aircraft firmly to the ground which did not allow for the Oleo's to work as designed....and as there was no Rotor Brake on the A Model Chinooks.....there was no quick way to shut it down....thus the sad results.
The thing that stands out about the AStar coming to bits is how quickly the cabin roof and forward section of the aircraft separates....confirming how weak that thing is built.
Sadly...they chained the aircraft firmly to the ground which did not allow for the Oleo's to work as designed....and as there was no Rotor Brake on the A Model Chinooks.....there was no quick way to shut it down....thus the sad results.
The thing that stands out about the AStar coming to bits is how quickly the cabin roof and forward section of the aircraft separates....confirming how weak that thing is built.
Joined: Sep 2002
Aviation Qualifications: CPL
Posts: 4,721
Likes: 637
From: Great South East, tired and retired
Sassy, the story I read was that the gearboxes had been emptied of oil and this was a test to destruction to see how long they could go.
Who knows the real story? Nick? John Dixson? The Sultan??
Who knows the real story? Nick? John Dixson? The Sultan??
Joined: May 2002
Aviation Qualifications: ATP+Mil
Posts: 18,633
Likes: 1,072
From: Downeast
AC,
You better check your sources for your information.
Trust me on this this....it was a ballistics tolerance test program.
http://www.chinook-helicopter.com/hi.../84-24156.html
You better check your sources for your information.
Trust me on this this....it was a ballistics tolerance test program.
http://www.chinook-helicopter.com/hi.../84-24156.html
Last edited by SASless; 14th July 2021 at 02:21.
Joined: Oct 1999
Aviation Qualifications: ATPL
Posts: 7,373
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From: Den Haag
and as there was no Rotor Brake on the A Model Chinooks.....there was no quick way to shut it down....thus the sad results.
Joined: Feb 2006
Posts: 557
Likes: 27
From: At home
The “spread eagle” landing gear, don’t support ground resonance either, but a hell of a hard landing… Damage of the lower vertical fin also suggest it has hit the ground hard.
Have a look at the Brazilian BA that shook itself to pieces and compare.
Joined: May 2002
Aviation Qualifications: ATP+Mil
Posts: 18,633
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From: Downeast
212man is correct.....the aircraft was being controlled remotely.....simple automation re engine controls.
Notice the rather large and high berms all round the aircraft.....and note that Aberdeen Proving Grounds is focused upon things that go bang.....Fort Eustis in Virginia is the maintenance training base....and Fort Rucker is the home to the Aviation....and now days the military facility in Huntsville, Alabama does some aviation related testing.
From the Aberdeen Proving Grounds historical data.....During the period of conflict in Southeast Asia, APG reentered a period of intense growth and new direction.
Notice the rather large and high berms all round the aircraft.....and note that Aberdeen Proving Grounds is focused upon things that go bang.....Fort Eustis in Virginia is the maintenance training base....and Fort Rucker is the home to the Aviation....and now days the military facility in Huntsville, Alabama does some aviation related testing.
From the Aberdeen Proving Grounds historical data.....During the period of conflict in Southeast Asia, APG reentered a period of intense growth and new direction.
The recreation of the Ordnance Officer Candidate School (OCS) took place and the unusual contributions of the Land Warfare Laboratory increased.
The intensive developmental efforts and scientific contributions of the Ballistic Research Laboratory, the Army Materiel Systems Analysis Activity and the Human Engineering Laboratory made the decade of the 1960s and 1970s an extraordinary time in APG's history.
The Ordnance Center and School's contributions included three-shifts-a-day training at the height of the conflict.
A significant change was made on July 1, 1971, when Edgewood Arsenal, the former chemical center and current chemical research and engineering center for the U.S. Army, was merged into APG. Although the mission functions remained separate entities, the real estate and base operations functions were operated as one post. From this point on, APG was the common identifier for both areas.
The intensive developmental efforts and scientific contributions of the Ballistic Research Laboratory, the Army Materiel Systems Analysis Activity and the Human Engineering Laboratory made the decade of the 1960s and 1970s an extraordinary time in APG's history.
The Ordnance Center and School's contributions included three-shifts-a-day training at the height of the conflict.
A significant change was made on July 1, 1971, when Edgewood Arsenal, the former chemical center and current chemical research and engineering center for the U.S. Army, was merged into APG. Although the mission functions remained separate entities, the real estate and base operations functions were operated as one post. From this point on, APG was the common identifier for both areas.
Joined: Mar 2007
Posts: 1,017
Likes: 165
From: Hobe Sound, Florida
SAS, your information is all I have seen re the video clip. It certainly looks like the classic 2/3P mechanical instability as it starts. Easy to criticize when ignorant of the details as to what they were doing, but taking away the wheels and gear struts, key parts of the dynamics involved, and replacing with a cable system that, just looking at the video, still allowed for aircraft motion, most likely didn’t help.
Joined: Nov 2006
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From: After all, what’s more important than proving to someone on the internet that they’re wrong? - Manson
B3 incident not ground resonance at all. Technical issue on maintenance flight and happened just North of the airport.
Post may be a little disparaging when you can see the pilot is still in the aircraft and incapacitated.
Maybe it’s just a plastic Ozzy thing.
Just as well the internet is a recent thing and older skeletons remain in the closet?
Post may be a little disparaging when you can see the pilot is still in the aircraft and incapacitated.
Maybe it’s just a plastic Ozzy thing.
Just as well the internet is a recent thing and older skeletons remain in the closet?
