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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.

Aircraft wing cutting steel post
Analytical Service Pty Ltd
TN101

TECHNICAL NOTE 101

The wing of the Tu-154M airliner was modeled using the available external geometry, known material properties and the approximate design loads like those for the sister aircraft, Boeing 727-200. According to the official report on this Smolensk disaster, the point of impact was 10.8 m from the centerline of the fuselage.

The post model has 300 mm diameter, 8 mm wall thickness, is 12 m tall and is impacted at mid-height. According to the official reports, the fall of the aircraft was caused by a birch- tree cutting through the wing. The likely dimensions of the "suspect birch" are quoted below and the resulting shear strength is estimated to be about one-third that of the described post.

The details of the wing are illustrated in Figs. 01-03. The view of the complete model is given in Fig.1. The outer (detachable) wing is modeled in detail, the inner wing is coarsely approximated as no impact load is directly involved there. The thin lines represent sizeable tubular members connecting the wing with the fuselage axis. The purpose of modeling these additional elements is to be able to approximate the inertia of the whole aircraft.

Effects of the collision is illustrated in Figs. 2-5. The change of forward velocity of the craft as well as that of the yaw were very small, almost imperceptible. The lift and the drag forces are applied to the wing during the event.

COMPARISON OF THE SHEAR STRENGTHS

Steel pole:

D = 300 mm, h = 8 mm, therefore section area A1 = 7339 mm2
Construction steel, Fy = 350 MPa, Fu = 430 MPa, e = 16%.
Shear strength, Fsu = 0.6 Fu = 258 MPa
Section strength, single shear: P1 = A1Fsu = 7339x258 = 1893.4 kN

Suspect birch:

D = 400 mm, therefore A2 = 125,660 mm2
Shear strength : Fsu = 5 MPa
Section strength, single shear: P2 = A2 Fsu = 125,660 x 5 = 628.3 kN
(Upper values were used here, but not the absolute maxima. It would be unreasonable for these circumstances to do otherwise.)

Strength ratio:

P1/P2 = 1893.4/628.3 = 3.01

The mass density of the pole is increased above that of steel, so that its mass per unit length is the same as for suspect birch. (Specific mass of the latter was assumed as 700 kg/m3.) (Note: A small error was made in that the pole density was doubled, compared to what it should have been. This made the pole appear somewhat stronger that it was.)

FURTHER DETAILS

The material properties of the aluminum alloys used were
2024-T3:Fy =293MPa,Fu =448MPaande=16%
7075-T6: Fy = 493 MPa, Fu = 545 MPa and e = 9% (Stringers only)

which are the averages of published data and which are similar to the original Russian alloys involved.

Structural properties near impact point: Main skin: 5 mm, front longeron wall: 4 mm, nose skin: 3 mm and rib 3 mm. The stringers are thick-wall I-beams which, in this region, have the section of 1010 mm2. As there are 3 longerons, 6 of the stringers are used as caps.

Smolensk crash scientific analysis: Ribs and longerons of the wing assembly. Different colors designate different thicknesses.

Fig. 01 Ribs and longerons of the wing assembly. Different colors designate different thicknesses.

Smolensk crash scientific analysis: Fig. 02 Top and bottom skins

Fig. 02 Top and bottom skins

Smolensk crash scientific analysis: Fig. 03 Top and bottom stringers. Different colors designate different section areas.

Fig. 03 Top and bottom stringers. Different colors designate different section areas.

Smolensk crash scientific analysis: General view of the wing model. The long line disappearing near the top depicts the fuselage axis. The lines below the wing model the undercarriage (mostly for inertia). The post is at right angles to the wing axis.

Fig. 1 General view of the wing model. The long line disappearing near the top depicts the fuselage axis. The lines below the wing model the undercarriage (mostly for inertia). The post is at right angles to the wing axis.

Smolensk crash scientific analysis: The initial contact of the wing and the pole. The relative speed of the two may be thought of as having two components: Across and along the leading edge. This will cause the damaged area of the nose to widen as the motion progresses.

Fig. 2 The initial contact of the wing and the pole. The relative speed of the two may be thought of as having two components: Across and along the leading edge. This will cause the damaged area of the nose to widen as the motion progresses.

Smolensk crash scientific analysis: Fig. 3 The pole breaks above and below the wing. The short segment between the two wing surfaces becomes lodged in the wing.

Fig. 3 The pole breaks above and below the wing. The short segment between the two wing surfaces becomes lodged in the wing.

Smolensk crash scientific analysis: On the left the post is shown just after the initial contact. On the right the segment of the post removed by the wing is depicted.

Fig. 4 On the left the post is shown just after the initial contact. On the right the segment of the post removed by the wing is depicted.

Smolensk crash scientific analysis: The extent of damage suffered by the wing is illustrated by comparing the state just after the first contact (left) and after breaking of the post (right). The nose rib is crushed and a short segment of the front longeron is bent-in.

Fig. 5 The extent of damage suffered by the wing is illustrated by comparing the state just after the first contact (left) and after breaking of the post (right). The nose rib is crushed and a short segment of the front longeron is bent-in.

Smolensk crash scientific analysis: The resultant reaction force at the base of the post. Upon the impact, the post begins to vibrate, which shows itself in the magnitude of the base reaction.

Fig. 6 The resultant reaction force at the base of the post. Upon the impact, the post begins to vibrate, which shows itself in the magnitude of the base reaction.

 
"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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