Edward, You

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It seems one of the tests of Mythbusters crazy, but it really is one of NASA's tests for a supersonic parachute to be used on Mars. The testing revealed a defect in the parachute, you will see that towards the end. After all, that's why you do the testing. And it is with tests like this that attract bright young minds.
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03.02.14 11:34
Maximum Cassinari to prevent tripping and takeoffs away! Both have the same push. :). The push (thurst) is the same, but what matters here is the acceleration. And at 45 degrees you play 30% of the acceleration. Imagine if you put them vertical: the thrust is the same. Acceleration is nothing unless you make a hole in the ground ... :) An alternative would be to build an elevated rail, so that the tow could pass BELOW. But the elevated railways to NASA probably cost much more than small solid-fuel rockets "off-the-shelf". Otherwise called BORN :). Therefore more efficient to put a rocket in more efficiency and a damn.
Edward, You're right, probably both count the reasons but we have indicated that prevails in many. If the vertical component of the force does not compensate for the one that tends to turn the sled acceleration due to the load on the cable, the train is lifted like a dragster and threatens to derail. Estimated that the overall thrust exerted by the rocket is about 450,000 N, enough to lift off the ground in a vertical 747 almost arinc 717 at full load.
Uh oh! The want sape 'all? I think I said a great f ** k ata ... In fact, if the rocket is mounted above the attachment point of the rope, the slita CAN NOT 'absolutely tipping over. Motorcycles, etc. dragster. capsize because the force is applied to the point of contact of the tires with the road, which is below the center of gravity, where the only force is applied in addition to the game engine thrust, which is the weight force. The result is a moment that tends to drive up the vehicle. In this case, the thrust is applied in the upper, where the jets come out. If the rocket is mounted well above the attachment point of the rope, the thrust exerted by the rocket can have no effect other than to push the slide against the rail, that is, so to speak, arinc 717 of "impuntarla". This can be easily seen by imagining, for one thing, they have nothing attached to slita. In that case the sled start like a rocket ... [IMG] http://www.sandia.gov/vqsec/images/Eject% 20Sled.jpg {/ IMG] For the second thing you have to imagine the opposite case: the sled is attached to a mountain. What would happen is the same thing: the slide does not move but it starts to download the thrust on the tracks. In any case you can not overturn. After I do a little drawing. My apologies, Sir ... I guess you're right.
I believe instead that the rockets that might serve to put the sled tere crushed on the rails. They put the rockets horizontal although protecting the cable, in the case of a small depression or eversion on the rails would make it take off.
... If that were not enough, the sleigh to withstand vibration and imbalance is clearly engaged on both sides of the track. As it is obvious that it is. One thing I still do not understand is why, instead of guiding the rockets upward, they have simply stretched the cord to increase the distance between the slide and the support tower. Among other things, it would seem that the parachute being ripped apart by a yellow cord broke off abruptly arinc 717 by the support not due to the aerodynamic load. See at T = 4:29. It is not obvious whether this cable is part of the hardware to be checked or not.
Maximum Cassinari to prevent tripping and takeoffs away! Both have the same push. :) Good first! The thrust is the same: the rail is op