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Smolensk Crash News Digest
Independent News, Research, Scientific Analysis, and Commentary on the Smolensk Crash and its Implications. Flag of the United States of America
"The dismantling of the Polish State has just ended. Now people will start to disappear." Dr. Janusz Kurtyka Contact | About
  • Smolensk Crash DisinformationNo one saw anything, no one heard anything, no one filmed anything ...
  • Russian Image Management by Euguene PoteatRetired CIA Senior Scientific Intelligence Officer Euguene Poteat speaks out
  • TNT and other explosives detected on the wreckage of Polish presidential planeC4, TNT, RDX, HMX (octogen), p-MNT and Nitroglycerine detected ...
  • Smolensk Crash related deaths"The Serial Suicider" Strikes Again. Key witness dead!
  • Countdown to the crash of Flight PLF101Countdown to the crash of Polish Governement Tupolev TU-154M flight PLF101.
  • Smolensk Widow Beata Gosiewska exposes the Smolnesk Crash LieSmolensk Crash Widow exposes the "Smolensk Lie"
  • The List of 96 Victims of Polish Air Crash In Smolensk, Russia, on April 10, 2010.The list of 96 victims
  • 9 Questions for Professor Binienda.Is the U.S. scientific community interested in the Smolensk crash?
  • The destruction of the plane was initiated while it was still airborne, approaching landing.The destruction of the plane was initiated while it was still airborne, approaching landing.
  • Lech Kaczynski's Security Was Purposefully CompromisedPolish president's security was purposefully compromised!
  • Slide 11 Title Goes HereThe main causes of the Polish Tu-154M crash were two explosions onboard.
  • Facts presented in this report demonstrate a clear and convincing evidence of obstruction of justice in the one-sided and superficial investigation that violates basic norms of any airplane crash investigation, elementary standards of due process of law, and rights of the families of the victims.Was the official investigation an obstruction of justice?
Polish air crash disinformation. Russian Image Management by Retired CIA Senior Scientific Intelligene Officer, Eugene Poteat, LL.D Traces of explosives detected on remains of Polish president's plane. Serial Suicider on the loose. The crash of Flight PLF101 Timeline. Polish air crash lie exposed. Victims of Polish air crash. 9 Questions for the lead scientist in the independent Smolensk crash investigation. Mechanical and structural aspects of 2010 crash of Polish Government Tupolev TU-154M in Smolensk, Russka. Polish president's security was intentionally compromised. Scientific analysis of Smolensk crash points to the invalidity of the official findings. 2014 independent Smolensk Crash Raport: What do we know about Smolensk crash today.

Inverted impact of aircraft fuselage on semi-soft ground
Analytical Service Pty Ltd
TECHNICAL NOTE 66B

TECHNICAL NOTE 66B

The reason for this investigation was to learn more about some effects of the crash that took place near Smolensk airport in April 2010. The airplane involved was Tu- 154M carrying 96 passengers. In the simulation presented below the fuselage is assumed to drop with its axis parallel to the ground. This allows us to model only a short segment of the entire fuselage.

Two impact velocities are simulated, 10 m/s and 20m/s. The first is the upper bound of the estimated vertical speed. The other number could be used for estimates where the falling fuselage axis makes a significant angle with the ground level.
There are two parts to this Note: In Part A the normal orientation is the ship is considered, while in B the inverted position, with the ceiling striking the ground is investigated.

In this part B the difference between the faster and the slower impact is not only the degree of damage. In the 10 m/s case the contact between the chairs and the stowage as well as the frame is quite minor, while during the faster impact that contact is very strong, as evidenced in the velocity plot. The fuselage model remains the same as in Part A.

DETAILS

Typical acceleration record of impact events (real or virtual as here) has many local sharp peaks. When read off the graph, such peaks have little meaning, as acceleration has to last for some amount of time to have a definite effect. This is especially true with regard to the influence of accelerations on passengers. For this reason we have taken 0.1s or 100 ms to be the reference time span. The acceleration as defined in this work is the maximum change of velocity during the event divided by 0.1s.

The reference point for reading velocities and calculating accelerations is the geometrical center of the floor. The acceleration is calculated as a multiple of g, where ‘g’ is the acceleration of gravity. For 20 m/s vertical speed the extremes of velocity are -24.55 and 12.07 m/s. Thus we have

a = (-24.55 – 12.07)/0.1 = - 366.2 m/s2 = - 37.33g

Similarly, for 10 m/s we get 17.92 g. (This for the interval between t= 20 and t = 120 ms. At the latter point the velocity is 3.02 m/s.) For our event, where the estimated speed is 8.5 m/s, this reduces to 15.23 g.

The results do depend on the assumed stiffness of stowage and chairs. They were taken in this simulation to be reasonably soft, but no special study of their properties was conducted. The softer those elements are, the larger deformation of the fuselage section will eventuate.

Smolensk crash investigation: Fall of Inverted Fuselage, Tim=0

Fig. 70 Full model with impacted ground. The details as in TN66A.

Smolensk crash investigation: Fall of Inverted Fuselage Time =37.698

Fig. 71 Early impact phase (10 m/s) with ovalization and flattening at the bottom.

Smolensk crash investigation: Fig. 72 Fig. 72. Advanced impact phase, near beginning of rebound. Permanent distortion of the shell is visible in several places.

Fig. 72 Advanced impact phase, near beginning of rebound. Permanent distortion of the shell is visible in several places.

Smolensk crash investigation: Fig. 74 Velocity history shown here is the result of intense vibrations caused by impact plus the translation of the reference point. (The former is marked in the early phase.) This is 10 m/s drop.

Fig. 74 Velocity history shown here is the result of intense vibrations caused by impact plus the translation of the reference point. (The former is marked in the early phase.) This is 10 m/s drop.

Smolensk crash investigation: Early phase of impact with 20 m/s. A joint is forming in the plane of symmetry.

Fig. 81 Early phase of impact with 20 m/s. A joint is forming in the plane of symmetry.

Smolensk crash investigation: Falling at 20 m/s. Advanced deformation and breakage. The chairs and the overhead stowage are interfering.

Fig. 82 Falling at 20 m/s. Advanced deformation and breakage. The chairs and the overhead stowage are interfering.

Smolensk Crash investigation: Maximum deformation, near the rebound point. The frames are broken at spots, but the skin remains intact.

Fig. 83 Maximum deformation, near the rebound point. The frames are broken at spots, but the skin remains intact.

Smolensk crash investigation: The status after the early rebound phase of 20 m/s drop.

Fig. 84 The status after the early rebound phase of 20 m/s drop.

Smlensk crash investigation: The disturbance between 40 and 80 ms is due to the floor beam and the frame below coming in contact

Fig. 85 The disturbance between 40 and 80 ms is due to the floor beam and the frame below coming in contact

 
"Russian Image Management"

The trip to Smolensk was expected to highlight Russia finally admitting culpability in the massacre, after long having blamed it on the Germans, an atrocity they had tried to conceal for over 70 years.

Eugene Poteat, retired CIA Senior Scientific Intelligence Officer.

As for the reception committee, it had different ideas. Putin wasn’t looking forward to such an occasion. Into this poisonous reception brew was President Kaczynski’s well-known public criticism of Moscow and Putin, a habit that has ended the lives of others within Russia – and abroad. A few discouraging Russian requirements – that Kaczynski could not attend in any official capacity – did not halt the Poles. Kaczynski would go anyway on non-official, “personal” business. To Russians, such a distinction would be meaningless, not lessening the possible international excoriation of such an event. A problem ripe for a modern, Russian solution: a tragic, ‘natural’ accident.

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