Longest Jump Story
People who liked this video also liked
Comments
12 comments posted so far. Login to add a comment.
67
2. sux2bu commented 10 years ago
For the short violent version see below:
http://www.snotr.com/video/13178/World_record_attempt_goes_bad
http://www.snotr.com/video/13178/World_record_attempt_goes_bad
35
7. schlafanzyk commented 10 years ago
My understanding is that this happens because he lifts off the throttle half way into clearing the distance. It has something to do with energy stored in the rotation of the wheels/gearbox/engine, which transfers into rotation of the car. It is in part the same effect that makes a helicopter crash immediately without a second rotor, although not quite the same. I forgot where I learned about that, may be someone else knows a little more.
You can see it starting to happen at the 80 meter test jump, where the car is already beginning to tip over towards the end as he lifts off. At the shorter tests, the air time is too short for this effect to show and he only lifts off at the landing. At the final jump, he is absolutely fine, hitting the rev limiter, until reaching the top of the curve, when you can hear the revs dropping off and the car goes totally out of shape immediately. It seems like he is not even clutching out for the jump, because you also see snow flying backwards on a few of the shorter jumps.
Put in simple terms: Even when in the middle of a jump, floor the throttle to raise/stabilize the front of the car, lift off/brake if you need to lower the front significantly - like Tanner Foust had to in his world record jump with Hot Wheels, where the ramp almost caused an opposite scenario.
You can see it starting to happen at the 80 meter test jump, where the car is already beginning to tip over towards the end as he lifts off. At the shorter tests, the air time is too short for this effect to show and he only lifts off at the landing. At the final jump, he is absolutely fine, hitting the rev limiter, until reaching the top of the curve, when you can hear the revs dropping off and the car goes totally out of shape immediately. It seems like he is not even clutching out for the jump, because you also see snow flying backwards on a few of the shorter jumps.
Put in simple terms: Even when in the middle of a jump, floor the throttle to raise/stabilize the front of the car, lift off/brake if you need to lower the front significantly - like Tanner Foust had to in his world record jump with Hot Wheels, where the ramp almost caused an opposite scenario.
53
8. Judge-Jake commented 10 years ago
#7 Actually put in even simpler terms it started to go wrong in the guys face just before the rev's even started... That look of "What the fuc* am I doing here" second later all doubt was removed.
30
9. pauldmixer commented 10 years ago
#7 I think this is part of the issue, but the rotational mass of the wheels is pretty insignificant compared to the mass of the entire vehicle. (compared to a snomobile or motorcycle where the their ratios are much closer) It appears as if the car starts to pitch forward immediately after leaving the ramp which would point to the suspension unloading prematurely and/or the ramp "trampolining" from deflection, or both. You can see the car pitching forward too much in the 80M attempt as well.
35
10. schlafanzyk commented 10 years ago
#9 But if the ramp/suspension setup was the problem, he would not be perfectly horizontal at the zenith point (the theoretical optimum case), right? And all of a sudden go way off towards the landing. You can clearly see the nose tipping over much faster at the exact moment of the revs dropping. May be that's coincidence and the aerodynamics also reaching a tipping point or something else also had a bigger impact at that point, but to me it seems like he was in perfect shape, grinding away at the rev limiter up to the zenith point. That's usually when you get scared, not being able to see the ramp yet, because it feels like days have gone by already, and lift off prematurely to be able to see something.
30
11. pauldmixer commented 10 years ago
#10, perhaps we should just argue our insufficient knowledge of the subject over a pint or two... You might be correct about the rotational mass. I just don't think that's the only issue here.
+9 1. Judge-Jake commented 10 years ago