Summary: This report considers a possibility of the wing-birch collision. It is shown that the wing is much stronger, which makes little doubt about an outcome of such an event. However, with the possibility of the wing being seriously damaged prior to collision, the loss of the wing tip can't be excluded. In Polish.
Summary: This is the record of a debate about the resistance that a wood trunk can offer. Two shearing modes are discussed: Basic shear (one side of a beam) and two- blade shear (opposite and equal load on each side of the beam). It was concluded that in the event being discussed the first mode prevailed. In Polish.
"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.
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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