PPRuNe Forums - View Single Post - BREAKING NEWS: airliner missing within Egyptian FIR
Old 5th Nov 2015, 16:12
  #1164 (permalink)  
lomapaseo
 
Join Date: Mar 2002
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Holes, Inner or outtie

I note a lot of posts about holes in structures and speculative conclusions about bombs etc.

Almost every prang that destroys an aircraft has such. The challenge to the investigator is to assess what velocity was involved and by what type of particle origin.

The vast majority originate from aircraft or engine structures that are forced or pushed outward at no more than the impact vector velocity. The tearing fractures along the hole are classic (tensile shear) in this sense.

Explosive impacts (missiles, bombs and/or uncontained engine parts) impact at much higher velocities (over a range). Thus these holes often have the presence of cratering (adiabatic shear etc.) and/or multiple dissimilar impacts over an area near the hole.

The investigators on scene know this and can be expected to comment if seen.

(note: I haven't seen any comments from them at this time)
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