Originally Posted by
SASless
Thud,
In case you have not heard of this bit of Aerobatics (uncommanded) by a US Army Chinook Crew....it is compelling reading.
I am trying to find data that will connect this event aircraft to the one seen self destructing in the "Ground Resonance" video over in "Rotorheads" forum.
A reference Iinked in that thread mentions the aircraft in the video was "the one that went inverted" earlier in its life.
The Pegasus CH-47 Chinook Helicopter video archive.
One of the disadvantages of a fully articulated rotor system, such as that found on the CH-47 Chinook helicopter, is the susceptibility to ground resonance. Items to consider in limiting the chances of encountering ground resonance include ensuring that all tires are inflated to 88 psi and all landing gear struts and blade dampeners are properly serviced.
The two videos below show the result of a Chinook helicopter falling victim to ground resonance. The tail number was 84-24156, and was the one that previously encountered uncommanded flight control inputs which resulted in the aircraft performing a barrel roll. After the roll incident, the aircraft was assigned to Aberdeen Proving Grounds in Maryland, and was utilized as a ground test device.
TAKE NOTE: The destruction of the airframe by ground resonance was not the intention of this test regardless of the claims made by those websites who have lifted the video from this URL.