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#44
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06-20-2021, 09:37 AM
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| ♚ Legacy Gold Member ♚ Poster Rank:3102 Male Join Date: Jan 2017 Posts: 124 Mentioned: 0 Post(s) Quoted: 24 Post(s)
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Re: Daredevil Motorbike Rider Dies During World-record Jump Practice, Washington
Very dangerous stunt. What’s sad is him leaving behind two young children.
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#45
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06-20-2021, 12:51 PM
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| ♚ Legacy Gold Member ♚ Poster Rank:99 Male Join Date: Nov 2009 Posts: 16,492 Mentioned: 6 Post(s) Quoted: 4547 Post(s)
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Re: Daredevil Motorbike Rider Dies During World-record Jump Practice, Washington
No. Look at how he hit the exit ramp. If the ramp had been 5 feet lower, it would have been a perfect landing and he would have scooted off to the applause of all the watchers.
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#47
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06-20-2021, 06:36 PM
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Re: Daredevil Motorbike Rider Dies During World-record Jump Practice, Washington
Lower landing ramp means higher speed landing, as now you have your forward velocity and downward pull of gravity. It’s a physics thing. You want the landing on a longer jump to be above your starting position not below it. Layman’s explanation: the further the travel distance, the higher you need to jump. Since gravity works on all objects at a constant speed this means the moment the bike starts falling it will fall at the same speed as a dropped object regardless of forward momentum. Imagine being on a bike and being dropped straight down. At 20 feet that’s going to injure. Much above that and you will die. You want a higher landing ramp to mitigate the fall distance, as to the stuntman that fall distance is the greater threat than the forward momentum (so long as they make the distance of the jump). The bike’s shocks and the stuntman’s body simply cannot take a free fall from more than about 20 feet. The forward speed is less dangerous unless there is an object in front of you (such as a wall). Because the impact is with the ground and the ground is directly below you, the most dangerous force is always going to be gravity. This is the same logic snipers take into consideration when shooting a long distance target. You have to account for the distance the bullet will drop before it reaches the target. From our perspective on solid ground standing still the stunt appears very different than it does to the stuntman. The speed of a moving object actually slows down time for the object. Consider this anecdote: you’re standing on a sidewalk watching as a train goes by at 75 mph. On the train is a juggler. From your perspective the juggler moves by in a flash and each object he tosses up soars forward with the train as she catches 75mph fastball after 75mph fastball, and flies past you in a blur. From the juggler’s perspective the balls are travel up and down at normal speed and it is no different than juggling while standing still. Meanwhile you seem to fly by in a blink of an eye and slowly disappear behind the train. Everything in front of the train moves in super slow motion until it reaches the train and then it speeds up and flies by too. This is a simple version of the theory of relativity. Time literally flows different on a motorcycle than it does on solid ground. And like the juggler, the most important variable is the fall distance not the forward momentum. The juggler doesn’t try to catch the ball as if it was thrown by a major league baseball player and the stuntman doesn’t try to land as if the ground is flying at them like a bullet. So long as the speed is measured correctly in both cases forward momentum doesn’t matter. Again, the concern is gravity. The juggler is only estimating the speed at which the objects thrown fall back toward their hand with zero concern that they are moving forward with great velocity. The stuntman only worries about the downward motion of their bike and making sure to compensate for the shock of the fall. Assuming, of course, the speed of the stunt is calculated correctly. If not, nothing else matters… as happened in this video. He didn’t reach the LZ. Could be hesitation on the throttle, crosswinds, or just a miscalculation. If you’re considering any of those things while in the air, it’s too late. |
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#48
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06-20-2021, 09:11 PM
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| ♚ Legacy Gold Member ♚ Poster Rank:99 Male Join Date: Nov 2009 Posts: 16,492 Mentioned: 6 Post(s) Quoted: 4547 Post(s)
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Re: Daredevil Motorbike Rider Dies During World-record Jump Practice, Washington
The ONLY problem he had was the exit ramp was too high. Watch the video. If the exit ramp had been 5 feet lower, he would have greased it on. Watch where he hits. If your arrival ramp is HIGHER than your departure ramp, you are going to die. |
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#49
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06-20-2021, 10:29 PM
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Re: Daredevil Motorbike Rider Dies During World-record Jump Practice, Washington
When you don't have enough speed it will look like that. His landing ramp was exactly where it was supposed to be to break the record. He just didn't get enough pop off the first ramp.
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