Skateboard Jumping Question

[dsm]

http://home.datacomm.ch/chrom/Bild.dat/FarbPic/Skateboard/mike-maldonado-155-222.gif

I was watching some sports channel where they featured teenagers jumping over fire hydrants, big upright trash cans, & up onto hand railings without using a ramp of any kind to help them get air.

Question: How do they get the board to travel up with them without a strap on their foot (like snowboarders), or without using their hand to grab and pull the board up with them?

http://www.myboard.it/images/focus/skate-tricks/fs180ollie.gif

-dsm

[Patrick del Poker Grande]

They're high.

[bwana devil]

web page (http://www.switchmagazine.com/skateboarding_tips/how_to_ollie.html)

[DukeSucks]

How to Ollie (http://www.switchmagazine.com/skateboarding_tips/how_to_ollie.html)


http://www.switchmagazine.com/skateboard_pictures/how_to_ollie.jpg

damn, you're fast /images/graemlins/smile.gif

[belloc]

http://hoopmountain.com/midwest/images/mwDSC_0175.jpg

I was watching some sports channel where they featured teenagers bouncing basketballs without using anything of any kind to help them get them into the air.

Question: How do they get the ball to travel up with them without a strap on their hand, or without using their other hand to grab and pull the ball up with them?

[Shajen]

invisible sprites

[IQ89]

[ QUOTE ]
How do they get the ball to travel up...without using their other hand to grab and pull the ball up with them?

[/ QUOTE ]

The dribbling of a basketball is usually initiated by somebody first picking up the ball with both hands. Then of course the invisible spirits take over.

[Patrick del Poker Grande]

[ QUOTE ]

[ QUOTE ]
How do they get the ball to travel up...without using their other hand to grab and pull the ball up with them?

[/ QUOTE ]

The dribbling of a basketball is usually initiated by somebody first picking up the ball with both hands.

[/ QUOTE ]
Anyone with a bit of coordination can do it without picking it up like this.

[Lazymeatball]

what happens when you step on a board outside of the wheel base? It goes flying up. Now use your other foot to level it off again. It's not easy, i can't do it, but the physics behind it make sense.

[IQ89]

[ QUOTE ]
Anyone with a bit of coordination can do it without picking it up.

[/ QUOTE ]

Yeah, but that takes a bunch of smaller dribbles to to get it going, where the skateboarders don't have to do that. Skateboarders don't only use the inertia created by their own weight, which is exactly what's implied with the basketball analogy. Skateboarders use gripping tape to help pull the board up with them. Before gripping tape was around, you'd typically see riders using one hand to "grip and pull the board up."

Here's an example of how the board's upward mobility is being assisted by the rider's front foot held in place by gripping tape: (notice how the foot is rolled over on it's side for a better grip)

http://www.phy.duke.edu/~hsg/physics-challenges/ollie.jpg

[dsm]

Gripping tape uh? Well that explains it. Thanks guys for the web site and the explanation. On the show I watched I just didn't notice the tape. Plus today's skateboards seem to be much more flexible, which allows for a great deal of bounce, compared with the solid-wood skateboard I had as a kid in the early 1970's.(no kidding, solid wood with stone-like wheels). Anyway, mystery solved.

Thanks again.

[CrazyEyez]

[ QUOTE ]
Gripping tape uh? Well that explains it. Thanks guys for the web site and the explanation. On the show I watched I just didn't notice the tape. Plus skateboards seem to be much more flexible than the solid wood skateboard I had as a kid in the early 1970's (no sh**, solid wood with stone-like wheels), which allows for a great deal of bounce compared with mine as a kid which had zero bounce. Anyway, Mystery solved.

Thanks again.

[/ QUOTE ]
I think you may be misinterpreting and/or the other poster didn't explain it well -
Your feet don't really stick to the grip tape. The front foot really is just levelling out the board, not lifting it up by being stuck to it.
It's as simple as the back wheels acting as a fulcrum. You stomp down on the tail and the front part of the board pops into the air.
If you were stand behind the board and stomp down on the tail, you'd see pretty easily how the board gets completely off the ground.

[Izenra]

I am a former skateboarder. Doing an ollie is a real pain at the beginning. But now, even after 3 years of non-skate, I can still do it.

I think this is how it is done :
You jump, pushing a little more on your back foot. The board will then make an angle. While doing the angle, you are accending up in the air.

The angle combined with the grip makes enough friction that your front foot drag the skate into the air. Then you just positionate the board with your foot ( so it is straight)

[jakethebake]

If you're going to try any of this, please post video.

[chaas4747]

And please use the skateboard from the early '70s.

[turnipmonster]

agreed, it's something you never forget how to do.

[glen]

I ollied my first fire hydrant back in 1990, and now I don't think I could even jump over one. Recent wsop winner Ed Moncada used to skate also. We had a several hour long discussion about teh good old days of H-Street and Bill Danforth at a strip club in December. In fact, poker seems like a logical follow-up hobby to those that used to skate, since it fosters the kind of loner, independant (pun intended) mindset that skating did. . .

[jakethebake]

[ QUOTE ]
the kind of loner, independant (pun intended) mindset that skating did. . .

[/ QUOTE ]

I guess that's why there are always like six of these little creeps together everytime I see them. /images/graemlins/confused.gif

[jasonHoldEm]

[ QUOTE ]
I guess that's why there are always like six of these little creeps together everytime I see them

[/ QUOTE ]

That's just so there's enough people around to carry the dude with the massive head trama to the ER.

[stankybank]

I think it's called an 'ollie'. Some people are better at it than others.

[glen]

I just mean that it's not a team sport, as poker is not a team sport. . .

[Freakin]

To threadjack; has anyone seen the mythbusters where Tori tries to jump over a wagon on a bike? It's one of the funniest damn things I've seen on tv. I wish I could find a video.

[dsm]

[ QUOTE ]
[ QUOTE ]
If you're going to try any of this, please post video.

[/ QUOTE ] And please use the skateboard from the early '70s.

[/ QUOTE ]

Will do. I have just the camera:http://www.earthstation1.com/bbitzer.gif


The board I had was identical to the one below: solid, flat, and very slick due to its lacquered finish (those green stripes aren't gripping tape, they're painted on).

http://www.sk8boardworld.co.uk/support/images/Pictureh_146.jpg

It had rock-hard clay wheels and fairly steerable trucks as pictured below: (you hit a tiny rock and the board stopped cold. I wonder if urethane wheels brought an end to this problem?)

http://www.sk8boardworld.co.uk/support/images/roller-derby-trucks.jpg

Something I just noticed while searching around are today's "spring" trucks, which must make getting airborne a breeze:

http://www.sk8boardworld.co.uk/images/trucks/seismic2.gif

[thatpfunk]

[ QUOTE ]

Something I just noticed while searching around are today's "spring" trucks, which must make getting airborne a breeze:

[/ QUOTE ]

Um, no? You want tight trucks.