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  • 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.

Explosion inside aircraft wing
Analytical Service Pty Ltd
TN201

TECHNICAL NOTE 201

The purpose of this analysis Is to demonstrate a specific type of explosion inside a wing; an event which would cause a net downward impulse being applied to the wing. One should remember certain basic principles involved here. The first of them is that if the explosion is entirely confined within the wing volume, i.e. no skin is torn, there will be no net impulse applied to the wing as a result. The second is that if the skin is ruptured from the material exploding inside, with both top and bottom skin blown off, there could also be a near-zero effect, normal to the chord. If the downward impulse is desired, it seems best to place the explosive near the top skin, so that it gets broken and the outward jetting begins. The downward shock wave should preferably not break the bottom skin, but only inflate it.

A simulation of such an event was carried out with a flat charge placed along the top surface of the wing (Fig.1) and detonated. The wing fragment approximates that of Tu-154M aircraft.

The computational model is also shown in Figs. 2 and 3. Apart from the charge and the shell the model also involves an air volume (black mesh), somewhat larger than the wing slice. This facilitates observation of pressure changes and allows interaction between the explosive, air and structure. The lift and drag pressures (Fig.4) are present during simulation, but their effects on stress and deformation of the section are minor.

The wing slice is restrained by two rigid planes, one at each cross-section. They can't be penetrated by structural elements, but a section can slide along its respective plane. Only the nodes of the three longerons are restrained with regard to the sliding movement. The reactions at those points, especially in a vertical direction, give us the magnitude of the vertical explosive force applied to the wing.

It is interesting to compare the impulse applied vertically (Fig.11) with one along the wing, perpendicular to the planes limiting the wing slice (Fig.12). The second impulse is larger, firstly because it is applied to a larger area. It is also less meaningful, because the limiting planes are rigid. To make that component more real, one would have to widen the slice so that it covers one bay between two adjacent ribs. If the explosive is placed in that bay only, the ribs would tend to fly away along the wing axis making the actual reflected impulse considerably weaker. Still, the axial effect could be such that the wing would fly off on one side and that a sudden push could be felt at the fuselage.

One should also add that the simulation was run longer than shown here, to 10ms. There was no essential change, except that the rebound of the bottom skin became visible and the magnitude of the vertical impulse reached almost 1000 N-s. (Please see the animation, the link is below.)

DETAILS

The structure is made from an aluminum alloy 2024-T3 with the exception of stringers (visible only as lines) made of 7075-T6. Considering the way of modeling, stringers do not play a key role here.

The explosive material used was 7.5mm thick, had a density of 800 kg/m3 and specific energy of 1.25 MJ/kg. (Much less than TNT with 4.61 MJ/kg.) If such a material forms a one-sided sandwich with a 4mm skin (as near the rear longeron) one can expect the fly-off velocity of skin of up to 500 m/s. At that location this velocity was nearly attained, but the rest of the top skin was flying off much slower; 40 to 50 m/s was a typical range.

The vertical impulse is of interest by itself, because, if large enough, it can affect the flight trajectory. To confine the slice in the way it was done here suggest that the slice must be a part of a much longer wing segment, a continuum. That, in turn, implies that the charge occupies much more space than was modeled here. But even without getting into the size question one should note that the net vertical impulse (per width of slice) may be similar as calculated here, as long as the top skin can be broken and the bottom skin kept intact much longer.

The question of impulse magnitude arises if we want to draw some conclusions related to the Smolensk air crash of 2010. From the published sources we know the magnitude of the vertical impulse to which the wing was subjected. The impulse calculated here turns out to be miniscule compared with what took place. In other words, a large part of the wing span would have to be loaded with explosive to get a significant vertical impulse. It is not realistic to be expecting that based on the circumstances of the crash.

 

Explosion inside aircraft wing: A slice of the wing, normal to the leading edge is shown. The charge (in red) is placed under the top skin.

Fig. 1 A slice of the wing, normal to the leading edge is shown. The charge (in red) is placed under the top skin.

Explosion inside aircraft wing: The outline of the wing slice is shown without the explosive. The skin segments shown in blue are somewhat weaker than the rest.

Fig. 2 The outline of the wing slice is shown without the explosive. The skin segments shown in blue are somewhat weaker than the rest.

Explosion inside aircraft wing: The outline of the wing slice embedded in a dense mesh of air cells.

Fig. 3 The outline of the wing slice embedded in a dense mesh of air cells.

Explosion inside aircraft wing: The wing slice with aerodynamic pressure applied. The drag force is applied to the front longeron. (The magnitude of deformation is exaggerated for visual purposes.)

Fig. 4 The wing slice with aerodynamic pressure applied. The drag force is applied to the front longeron. (The magnitude of deformation is exaggerated for visual purposes.)

Explosion inside aircraft wing: Explosion pressure seen at the outer boundary of the air volume, soon after the initiation.

Fig. 5 Explosion pressure seen at the outer boundary of the air volume, soon after the initiation.

Explosion inside aircraft wing: As in Fig5, but a little later, when the shock wave approaches the bottom skin.

Fig. 6 As in Fig5, but a little later, when the shock wave approaches the bottom skin.

Explosion inside aircraft wing: Beginning of breaking of the top skin

Fig. 7 Beginning of breaking of the top skin

Explosion inside aircraft wing: The top continues to break and the bottom gradually inflates

Fig. 8 The top continues to break and the bottom gradually inflates

Smolensk crash scientific analysis: Final stage of deformation of the slice

Fig. 9 Final stage of deformation of the slice

Explosion inside aircraft wing: History of the vertical reaction applied by the wing slice to its supports. (Positive means the supports or the wing as a whole is pushed down.)

Fig. 10 History of the vertical reaction applied by the wing slice to its supports. (Positive means the supports or the wing as a whole is pushed down.)

Explosion inside aircraft wing: The result of integration, with respect to time, of the force in Fig.10. This is the net impulse applied to the wing as a function of time.

Fig. 11 The result of integration, with respect to time, of the force in Fig.10. This is the net impulse applied to the wing as a function of time.

Explosion inside aircraft wing: Impulse along the wing axis

Fig. 12 Impulse along the wing axis

A sheet of explosive (green plate) is placed near top skin and detonated. The top disintegrates while the bottom skin inflates. The objective was to estimate the downward impulse applied to the wing as a result.

 
"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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