High Side + Guardrail - Page 4 - ZX6R Forum
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post #46 of 56 Old 05-01-2016, 09:31 AM
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Any crumple zone in front of u is still a lot better than u taking a direct hit yourself.

U cant argue with that.
Except that's exactly what I'm arguing. A motorcycle that impacts before you do is NOT a crumple zone for you. You're in no way slowed down by hitting after it does. As far as your body and G forces on deceleration are concerned, there's no difference if you hit a car or a wrecked bike at that speed.

U cant argue with that.

Never ride faster than you can stop
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post #47 of 56 Old 05-01-2016, 09:44 AM
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What the heck are you guys even arguing about?

Anyway, I'm more curoius about the crash damage, especially regarding frame slider mounting points.
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post #48 of 56 Old 05-01-2016, 11:15 AM
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post #49 of 56 Old 05-01-2016, 04:02 PM
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You are so lucky noone was coming on the opposite direction...
You should practice emergency braking, i should do it too when i have a running bike again, everybody should...
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post #50 of 56 Old 05-01-2016, 05:43 PM
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What the heck are you guys even arguing about?
Apparently crumple zones dont really exist
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post #51 of 56 Old 05-01-2016, 06:14 PM
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Apparently crumple zones dont really exist
Crumple zone?

I get what your saying. Crashing and having the bike in front of me would make me feel better than just flying face first into an immovable object. Don't know if it will do any good against wall's but might help against cars. At least as a placebo effect.

________

Ultimately I think motorcycle armor is the most effective way to avoid some of that direct energy.

Here is an example of a functional crumple zone in action, featuring Loris Baz, using leathers/ armor specifically designed to absorb impact that would otherwise be transmitted directly to the rider's body.

Here's some video from Loris Baz's crash in Sepang. The airbag suit obviously serves as a "crumple zone" of sorts.

http://www.youtube.com/watch?v=on2mgiv4TxA

Here is some impact data.

Alpinestars Releases Loris Baz Crash Data | Cycle World

"Just exactly how intense was the crash though? Incredibly so, suggests the data, which confirms that Baz was running a staggering 180 mph when he first lost control of his Desmosedici GP14.2. He held on for another two seconds, but was eventually launched from the bike and landed on the ground 60 milliseconds later, with the highest energy impact recorded at 29.9 g on his left shoulder. The French rider then slid for a total of 6.6 seconds, Alpinestars says, adding that, “Despite the speed and level of impact force associated with the crash, Loris was able to walk away and resume testing.”
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post #52 of 56 Old 05-01-2016, 06:23 PM
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Originally Posted by Scorpi0 View Post
Apparently crumple zones dont really exist
A crumple zone on a car, only works if the people in the car are restrained. If the car comes to a stop, and they don't...... they're still going just as fast as they were, and will come to the same complete stop as the car. It's that sudden stop at the bottom we keep talking about.

The seat belts, the air bags, the telescoping steering column, the safety glass, the roll cage, the design of the seats themselves, and the padded dash all work with the crumple zones to reduce the gee loading -- they spread out the time it takes for the occupant to come to a stop. And the people in the car still come out with serious bruising where the belts restrain them, and burns form the air bags (if not shrapnel). Injuries are a LOT worse, without seat belts in use. All that padding and energy control goes right out the window. Most people that die in car accidents are the ones who get ejected from the car...... and that's 99% of the time because they weren't wearing a seat belt.

This is why it is so important to put infants and small children into car seats...... a 25 MPH impact with a wall will make them hit the dash, or the seat back, or the windshield just as hard as if you had tossed them out of a second story window.

No car surrounding you....... no crumple zone. Just your body. Back to the statistics -- almost all motorcycle impact accidents occur at < 30 MPH. The person operating the bike didn't account for all the variables, and couldn't scrub off enough speed, or maneuver the bike to avoid the impact. A glancing blow is far more survivable than a direct impact with a stationary object. That might only cost you a few broken bones.

If the impact speed exceeds about 40 MPH, it doesn't matter how good the safety gear is........ odds of survival go down drastically. A 3- 4 story fall.

You can't wrap yourself in enough bubble wrap to slow your body enough to survive that. Way past 200 gee.
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post #53 of 56 Old 05-01-2016, 06:28 PM
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Originally Posted by jd41 View Post
Crumple zone?

I get what your saying. Crashing and having the bike in front of me would make me feel better than just flying face first into an immovable object. Don't know if it will do any good against wall's but might help against cars. At least as a placebo effect.

________

Ultimately I think motorcycle armor is the most effective way to avoid some of that direct energy.

Here is an example of a functional crumple zone in action, featuring Loris Baz, using leathers/ armor specifically designed to absorb impact that would otherwise be transmitted directly to the rider's body.

Here's some video from Loris Baz's crash in Sepang. The airbag suit obviously serves as a "crumple zone" of sorts.

http://www.youtube.com/watch?v=on2mgiv4TxA

Here is some impact data.

Alpinestars Releases Loris Baz Crash Data | Cycle World

"Just exactly how intense was the crash though? Incredibly so, suggests the data, which confirms that Baz was running a staggering 180 mph when he first lost control of his Desmosedici GP14.2. He held on for another two seconds, but was eventually launched from the bike and landed on the ground 60 milliseconds later, with the highest energy impact recorded at 29.9 g on his left shoulder. The French rider then slid for a total of 6.6 seconds, Alpinestars says, adding that, “Despite the speed and level of impact force associated with the crash, Loris was able to walk away and resume testing.”

Baez went down on a straightaway, and ran into nothing but the 'smooth' surface of the track. His actual fall that resulted in the ~30 g was from roughly the height of the saddle of the bike. From there, it seems like he got to slide without any tumbling, or thrashing around. Extremely lucky.
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post #54 of 56 Old 02-27-2017, 11:21 PM
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What happened to the video, man? The link says it doesn't exist.

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post #55 of 56 Old 02-28-2017, 06:04 AM
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Private video..
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post #56 of 56 Old 02-28-2017, 08:23 AM
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private video..
04-03-2016
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