Belgian Physicists Calculate that Everyone Is Lying About the Downed Russian JetQUOTE
And now, the science. In the video of the incident, which was posted online, it can be seen that one of the two jets got hit and starts crashing to the ground. The jet takes approximately 30 seconds to hit the ground. “Because the vertical movement is only dependent on gravity (g=9.81m/s², z=gt²/2), we can calculate that the plane was moving at a height of at least 4500 meters,” the phisicists write in their blog. “That number is consistent with the Turkish statement of the jets being at an altitude of 19,000 feet (5800 meters).”

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On the map provided by Turkish officials, it can be seen that the plane crashed eight kilometers from the place it was hit. The jet traveled those eight kilometers from the time it was hit until the time it crashed. A simple division gives an initial speed of 980 km/h, a perfectly acceptable speed for an aircraft travling at that altitude. So far, so good.
Then, the physicists take that speed and compare it to the distance the jets traveled in Turkish airspace according to the Turkish map, around 2 kilometers. When flying at a speed of 980 km/h, an object would cover that distance in seven seconds, instead of the 17 seconds according to Turkish reports. To cross that distance in 17 seconds, the plane should have been traveling at a meager 420 km/h. The video shows this simply could not be true, if the crash site is accurate. Physics 1, Turkey 0.
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The Turkish airforce says it warned the fighter jets ten times in five minutes. In five minutes, an aeroplane traveling at 980 km/h would cross a distance of about 80 kilometers. From these facts, the professors conclude: “How could the Turkish airforce predict that the Russian jets were about to enter Turkish airspace? Military jets are very agile, and in theory the Russian jets could have turned at the last moment to avoid Turkish airspace. The warnings issued to the Russian pilots were mere speculation at the moment they were made.”
According to those facts, the warnings couldn’t possibly have been issued in the time the jets were in Turkish territory. Unless Turkish air controllers can speak impossibly fast, issuing ten warnings in seven seconds seems kinda improbable. Physics 2, Turkey 0.

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On the Russian map, it can be seen that the plane makes a ninety degree turn after it was hit, which is quite impossible. According to the physicists, the only way this could be achieved is if the momentum of the incoming rocket was so much larger than the momentum of the jet that the latter would be negligible. “A change of course of 90 degrees can only be achieved with an object that’s many times heavier or faster than the jet,” the physicists write. From this we can conclude that the jets were not actively trying to avoid Turkish territory, which is the Russian side of the story. Physics 3, Turkey 0, Russia 0.
You’re free to decide what political conclusions you arrive at with this information. The authors don’t mention the whole political situation, they just focus trying to distill facts out of the observable information: a rare and admirable thing in a time in which almost everything comes with some political spin.
http://motherboard.vice.com/read/belgian-p...ned-russian-jet