be3 extreme sports: May 2011

Tuesday, May 31, 2011

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Source: http://feedproxy.google.com/~r/blogspot/uUCU/~3/3FS8uiDxJ2w/extreme-sports-physics-rss-feed-widget.html

Anjie Walton Jon Julio Jon Murakami John Starr

Dick van der Spek

Sebastiaan_Rademaker posted a photo:

Source: http://www.flickr.com/photos/45263395@N00/5783501150/

Mountain biking BMX Inline skating Cliff diving

iXS European Downhill Cup 2010: Julien Camellini Dominates In Pila, Italy

One of the most beautiful races of the European series was staged last weekend in Pila. The cup�s penultimate race attracted 320 riders from 15 countries.

Source: NEWS/Biking/iXS_European_Downhill_Cup_Pila_Italy_2010_Results_0760.htm

Karen Feitosa Lauren Perkins Lyn-Z Adams Hawkins

Freestyle Motocross Backflip Limit

Freestyle Motocross superstar Travis Pastrana hails from Annapolis, MD. That's just down the road from my home town. Besides the fact that FMX is simply cool, having one of the most famous competitors based so nearby means that my son can't help but love watching the competitions (OK, I'll admit it, I like them too).

One day as we were watching Travis throw down backflips and double backflips on Fuel TV, it made me wonder just how many flips were at least theoretically possible. Well I finally got around to doing the calculations.

I'm not going to keep you in suspense - according to my caculations (I love saying that) the most backflips that a person could possibly do on an FMX bike seems to be 4.

This may be hard to believe, considering that nobody has managed more than a double backflip yet. In case you're wondering how I figured it out, read on for a brief sketch. If you don't really care about the physics, you can still rest assured that FMX has some room to progress, at least in the backflip department.

FMX Backflip Calculation

The first thing to consider in calculating the maximum number of backflips in FMX is that there is a limited amount of energy available. You can estimate the maximum amount of energy from the record FMX step up height (the equivalent of high jumping on FMX bikes), which currently stands at about 11 meters.

The energy necessary to lift a bike and rider 11 meters off the ground is

E=m g h= 16500 joules

where m is the total mass of the bike plus rider, which I estimated to be 150 kilograms

g is the acceleration of gravity, or 9.8 meters per second squared

and h is the height

When a rider flips, some of the energy that they would have used to achieve height is put instead into the energy of their rotation. Optimally, the energy should be split equally between the upward motion and the rotation. I can prove this, but it requires a little bit of calculus, which is hard to show in the rudimentary editor that Blogger provides. But it seems pretty sensible, if you think about it.

If anyone wants to know the details, drop me an email and I'll explain it. For now, you'll have to take it on faith.

Once you know the amount of energy that goes into getting altitude (16500/2 joules), you can figure out how high they fly during a max backflip attempt and how long they are in the air during a jump. Because they?re diverting half the total energy into spinning, and half of the total energy to getting height, they should only travel about half as high as in a record setting step up competition, or 5.5 meters (18 feet) off the ground.

To figure out how long the whole trip takes, you have to use the equation

h=1/2(g * t^2)

where ^2 means time (t) is squared.

This is the equation for how far something would travel (h) under constant acceleration (in this case, the acceleration due to gravity g) in a certain amount of time (t).

Because we know h and g, but not t, you have to rearrange this equation to find out how long it takes to go from the ground to a height h.

t=(2*h/g)^1/2

(^1/2 means the square root of (2*h/g))

But don't forget that the rider has to come back down as well, so the round trip is twice as long as it takes to get to h.

You can also calculate how fast they are rotating by using the equation for rotational energy.

E=1/2(I * w^2)

Where E again is 16500/2 joules, I is the rotational moment of intertia, and w is the rotational speed.

A little mathematical manipulation leads to the equation

total rotations (in radians) = w*t =(v^2/g)(m/I)^1/2

I also guessed that the bike and rider's rotational inertia (I) is about 150 kilogram meters squared. It's a reasonable estimate, and I can explain it to the very curious folks, but it doesn't make much difference in the final calculation (because we're taking the square root of I).

If you plug in the numbers, you find that an FMX rider could theoretically rotate through no more than about 22 radians. Radians are the measure of rotation in the units I'm using (SI).

There are 2*pi radians in a circle, so in other words they will do 3.5 full rotations, which corresponds to a quad backflip.

Here's how 3.5 rotations equals 4 flips in FMX.

In performing a single flip - the rider leaves the hill with their front tire pointing toward the sky and comes down with it pointed to the ground. Here's a video to prove it

That means the bike and rider actually rotate only a little more than halfway around when doing a single backflip. For every additional backflip, they add another full rotation. So, 3.5 rotations is the same as a quad-backflip.

There you have it. Based on data from the record setting step up competition, we can expect, someday, to see a very daring and talented FMX rider to pull of a quad backflip, but never any more (unless they try it on a much more powerful bike).

Source: http://feedproxy.google.com/~r/blogspot/uUCU/~3/oUYtQbaEZm0/fmx-backflips-limit-14.html

Cliff diving Matt Hoffman Aaron Feinberg Adam Kilgore

Skateboarding Dog

Source: http://www.youtube.com/watch?v=CQzUsTFqtW0&feature=youtube_gdata

River surfing Surfing Flowboarding Skysurfing

Kayak Chile 2011 - Part 2

and here the second part of our trip to chile 2011. have fun

kajak-austria.com

paddlers: luki & chris strobl, tim hunt, david couling, seppi strohmaier, jakub sedivy

Cast: Lukas Strobl

Source: http://vimeo.com/channels/whitewater#24158789

Ice climbing Rock climbing Bouldering Canyoning

REAL TOUR JEEP SAFARI

Source: http://extremeactions.blogspot.com/2007/02/real-tour-jeep-safari.html

Flying Paragliding Hang gliding Others

OZSAFAK ALADAGLAR TREKKING

Source: http://extremeactions.blogspot.com/2006/09/ozsafak-aladaglar-trekking.html

Karen Feitosa Lauren Perkins Lyn-Z Adams Hawkins

Monday, May 30, 2011

Mt. KA�KAR EXPEDITION by ARARAT TREK

Source: http://extremeactions.blogspot.com/2008/04/mt-kakar-expedition-by-ararat-trek.html

Cliff diving Matt Hoffman Aaron Feinberg Adam Kilgore

Skateboarding Dog

Source: http://www.youtube.com/watch?v=CQzUsTFqtW0&feature=youtube_gdata

Andy Kruse Angela Araujo Anis Iboulalen Anjie Walton

OUT-BOX

Donna Kenton letter responds to Sept 30 article about Charles Victor Tucker III, aka Chongo

Source: http://query.nytimes.com/gst/fullpage.html?res=9B01E2D71730F936A35753C1A96E9C8B63&partner=rssnyt&emc=rss

Amy Caron Karen Feitosa Lauren Perkins Lyn-Z

Sand Buggy Part 1 - Xtreme Sport

Source: http://www.youtube.com/watch?v=aJdzcPG0R64&feature=youtube_gdata

Free fall Parachuting Bungee jumping Wingsuit flying

Mt. A?RI SKI TOUR by TREKKING TURKEY

Source: http://extremeactions.blogspot.com/2009/10/mt-agri-ski-tour-by-trekking-turkey.html

Parachuting Bungee jumping Wingsuit flying BASE jumping

Lower Deer Creek

I had the honor of showing Jason Baker and Chase Nobles down for their virgin runs. Flow was just under 200 on the B.E.(Box Elder) gauge and was lower rather than higher but we still had a great time none the less. We had no portages, and the whitewater was quality the entire way through. Enjoy a central Wyo classic rarely seen by few.

"Cup the Balls"

Cast: Mike Perry

Source: http://vimeo.com/channels/whitewater#23866305

Jon Murakami John Starr Jonathan Bergeron Jose Felix Hormaetxe

Sand Buggy Part 1 - Xtreme Sport

Source: http://www.youtube.com/watch?v=aJdzcPG0R64&feature=youtube_gdata

Hang gliding Others Mountain biking BMX

Hawaiian X-Treme Sports TV - Trailer

Source: http://www.youtube.com/watch?v=u6bp-kYp6ug&feature=youtube_gdata

Nate Adams Andy Macdonald Bob Burnquist Bucky Lasek

Sunday, May 29, 2011

Whitewater Grand Prix: Stage 3 - Time trial teaser

The Whitewater Grand Prix brings together 25 of the Worlds best kayakers for a 6-stage competition on spectacular whitewater across Quebec.

Cast: Tribe Rider

Source: http://vimeo.com/channels/whitewater#23461559

Scuba diving Mountaineering Ice climbing Rock climbing

element skateboarding

Source: http://www.youtube.com/watch?v=va1v6Drp5Gc&feature=youtube_gdata

Ice climbing Rock climbing Bouldering Canyoning

WILD TURKEY ADVENTURES PARAGLIDING

Source: http://extremeactions.blogspot.com/2006/10/wild-turkey-adventures-paragliding.html

Anjie Walton Jon Julio Jon Murakami John Starr

Dads and Daughters Scale the Gunks in Upstate New York

Three friends, all 47, and their teenage daughters go for a day of rock climbing at the Shawangunk Ridge.

Source: http://www.nytimes.com/2010/07/09/nyregion/09rockclimb.html?partner=rssnyt&emc=rss

Snowskate Wakeboarding Dirtsurfing Motorsports

how to skateboard for beginners

Source: http://www.youtube.com/watch?v=dQMmP2NS_Qw&feature=youtube_gdata

Flowboarding Skysurfing Skateboarding Mountainboarding

ASA Big Air Triples 2010: Get Tickets Now For June 19th

For the first time ever, the ASA Big Air Triples welcomes skateboarders to the event, which previously has only showcased BMX riders. Tickets are now on sale for the event in June.

Source: NEWS/Skateboarding/ASA_Big_Air_Triples_2010_Get_Tickets_Now_For_June_19th_Preview_0669.htm

Brian Deegan Mike Metzger Nate Adams Andy Macdonald

zero skateboarding

Source: http://www.youtube.com/watch?v=iV81Ej9BRHI&feature=youtube_gdata

Brian Deegan Mike Metzger Nate Adams Andy Macdonald

LG Snowboard FIS World Cup 2011: Parallel Giant Slalom in Valmalenco

Warm temperatures at the parallel giant slalom of the 2011 LG Snowboard FIS World Cup made the course hard to handle. The conditions led Isabella Laboeck to make decisive mistake that gave Ekaterina Tudegesheva the win.

Source: NEWS/Snowboarding/LG_Snowboard_FIS_World_Cup_2011_Valmalenco_Results_0849.htm

Whitewater kayaking Whitewater canoeing Free diving Scuba diving

Saturday, May 28, 2011

Jossi Wells is AFP Overall World Champion For 2010

Unlike other performers, Jossi Wells rocks all three disciplines in freeskiing competitions. His AFP halfpipe rankings are off the chart and he continues to rack up the titles in the 2010 season.

Source: NEWS/Freeskiing/Jossi_Wells_is_AFP_Overall_World_Champion_Results_0636.htm

Dirtsurfing Motorsports Motocross Snocross

Wenger Patagonian Expedition Race 2010: Part 1

At the Wenger Patagonian Expedition Race, one of the hardest adventure runs in the world, the participants have to constantly push it to the limit.

Source: NEWS/Extreme_Sports/Wenger_Patagonian_Expedition_Race_2010_Part_1_0698.htm

Alessandra Nanni Alex Broskow Andre Englehart Andreas Trefzer

X-TREME SPORTS

Source: http://www.youtube.com/watch?v=n2uSSvSSEWU&feature=youtube_gdata

Free fall Parachuting Bungee jumping Wingsuit flying

Winter X Europe 2011: JF Houle Wins Slopestyle Gold In France

Rockstar skier, JF Houle, scores himself a gold medal at the 2011 Winter X Games in Europe. Houle persevered in the face of all challenges and came out victorious.

Source: NEWS/Freeskiing/Winter_X_Europe_Slopestyle_Gold_France_2011_Results_0851.htm

Free diving Scuba diving Mountaineering Ice climbing

PWT 2010 Pro Tour Awards Ceremony In Knoxville, TN

As the 2010 season comes to an end, the exhausted competitors will make their way to Knoxville, Tennessee for the 2010 PWT Awards Ceremony, where they will be recognized for their outstanding performances.

Source: NEWS/Wakeboarding/PWT_2010_Pro_Tour_Awards_Ceremony_Knoxville_Preview_0735.htm

Whitewater kayaking Whitewater canoeing Free diving Scuba diving

Hawaiian X-Treme Sports TV - Trailer

Source: http://www.youtube.com/watch?v=u6bp-kYp6ug&feature=youtube_gdata

Lyn-Z Adams Hawkins Vanessa Torres Snowboarding

Amazing Results Of 2011 6Star Burton US Open Slopestyle

Despite difficult weather at the venue in Stratton Mountain in Vermont, USA, Eric and Enni gave it their all and landed some impressive runs.

Source: NEWS/Snowboarding/6Star_Burton_US_Open_Slopestyle_2011_Vermont_Results_0840.htm

Parachuting Bungee jumping Wingsuit flying BASE jumping

Mt. A?RI SKI TOUR by TREKKING TURKEY

Source: http://extremeactions.blogspot.com/2009/10/mt-agri-ski-tour-by-trekking-turkey.html

River surfing Surfing Flowboarding Skysurfing

Friday, May 27, 2011

Adidas Skateboarding Frisco Feature

Source: http://www.youtube.com/watch?v=RxBseBwCKB0&feature=youtube_gdata

Mike Metzger Nate Adams Andy Macdonald Bob Burnquist

Mt. A?RI CLIMBING VIDEO TOUR

Source: http://extremeactions.blogspot.com/2008/04/mt-ari-climbing-video-tour.html

Adams Hawkins Vanessa Torres Snowboarding Sandboarding

T-Mobile Extreme Playgrounds in Berlin

For the third consecutive year, the international extreme sports elite from skateboarding and BMX will meet in Berlin on Sunday, December 6th, to celebrate the T-Mobile Extreme Playgrounds Street Session 2009.

Source: NEWS/Skateboarding/Extreme_Playgrounds_2009_Berlin_Preview_0498.htm

Neal Hendrix Renton Millar Sandro Dias Tony Hawk

Become A Pro Skateboarder: Tips and Tricks

This is your chance to make it big as a pro skateboarder. These tips and tricks will guide you on your way to becoming a professional skateboarder.

Source: NEWS/Skateboarding/Become_A_Pro_Skateboarder_0660.htm

Motocross Snocross Rallying Drifting

Skateboard Crash Part 1 - Xtreme Sport

Source: http://www.youtube.com/watch?v=_0Uv0ejcAaU&feature=youtube_gdata

Tony Hawk Amy Caron Karen Feitosa Lauren Perkins

Halfpipe World Cup leaders Xuetong Cai and Ryo Aono win Calgary event

Xuetong Cai and Ryo Aono have won the season�s fourth halfpipe contest, which wrapped up today�s double event at Canada Olympic Park in Calgary, thus extending their lead in the race for the Crystal Globe.

Source: NEWS/Snowboarding/LG_Snowboard_FIS_World_Cup_2011_Slopestyle_Calgary_0834.htm

Free fall Parachuting Bungee jumping Wingsuit flying

LG Snowboard FIS World Cup 2011: Finale In Arosa, Switzerland

The LG Snowboard FIS World Cup will organize two snowboard cross races on the 24th and 25th, one halfpipe competition on the 26th, and a parallel giant slalom on the 27th to finish things off. Some of the Crystal Globes are still up for grabs.

Source: NEWS/Snowboarding/LG_Snowboard_FIS_World_Cup_2011_Arosa_Switzerland_Preview_0850.htm

Jose Felix Hormaetxe Josh Clark Josh Obert Josh Petty

MOUNTAIN BIKING by ALTERNATIF OUTDOOR

Source: http://extremeactions.blogspot.com/2009/10/mountain-biking-by-alternatif-outdoor.html

Dom Kekich Neal Hendrix Renton Millar Sandro Dias

Thursday, May 26, 2011

4duos.com Montage 5.6 June Texas Skateboarding (HD)

Source: http://www.youtube.com/watch?v=3t-Brgd8qkc&feature=youtube_gdata

Nate Adams Andy Macdonald Bob Burnquist Bucky Lasek

WWA Wake Park World Series: Wakeboarders Gear Up For June

The dates and locations are in for the 2010 WWA Wake Park World Series. In its third year, this is the first series of its kind with an international field of professional wakeboarders setting up against their competitors at cable parks throughout the world.

Source: NEWS/Wakeboarding/WWA_Wake_Park_World_Series_2010_Preview_0576.htm

Josh Petty Brian Deegan Mike Metzger Nate Adams

ADAC 2009: From pedal to paddle

For the second day of the race, based on the picturesque Sir Bani Yas Island, the teams started with an opening 45.5 km MTB section followed by a 27km kayaking leg culminating at Umm al Kurkum Island.

Source: NEWS/Extreme_Sports/Abu_Dhabi_Adventure_Challenge_2009_Day_2_0219.htm

Snocross Rallying Drifting Supercross

WWA Wake Park World Series: Wakeboarders Gear Up For June

Source: NEWS/Wakeboarding/WWA_Wake_Park_World_Series_2010_Preview_0576.htm

BASE jumping Flying Paragliding Hang gliding

Nine Knights 2010: The Knights Are Ready

The line up for the most exciting freeski event of the year is set. The Nine Knights is anything but the usual freeski competition and on the 24th of April they will leap through the snow, battling for fame and glory.

Source: NEWS/Freeskiing/Nine_Knights_Line_Up_2010_0636.htm

Josh Petty Brian Deegan Mike Metzger Nate Adams

"Peng Qiaqia sex CD" case, Lu Liang actress parole Xinhua BEIJING,

Start: 05/23/2011 - 1:00am

Timezone: Etc/GMT-7

May 25, according to Taiwan's "United Evening News" Mulberry handbags reported reported that close to 25 noon, Lu Liang friends get left to be driving a small passenger car Longtan female prison more than a year, did not make a statement. Polo Shirts The so-called "Peng Qiaqia CD case", Lu Liang in August 2003, accepted Peng Qiaqia rented apartment to her office to visit Chung Hsiao East Road, photographed Peng Qiaqia through masturbation, and afterwards extract the video tape, and burn them to disc. Peng Qiaqia after her uncle to find people with "crazy piano" Lu Zhao Qin coordinating mediation, pay a total of NTD 44.7 million yuan. , CD case, imprisonment for Peng Qiaqia heroine Liang Lu, 25, were released on parole, Longtan, Taoyuan County, at noon to leave the women's prison, because her sentence to only 26, 25, was released ralph lauren polo shirts from prison just one day earlier than the end of their sentences. Reported that Lu Liang was sentenced 2 years in jail on bail soon after the labor, birth to a baby girl, also served with a baby girl together. Taiwan's < mont blanc rollerball pens"Ministry of Justice," the middle of this month approved parole, the Taoyuan District Prosecutors Office 24, issued the protective custody of the commandment of the Longtan female prison punishment, mont blanc pens sale so that the release of Lu Liang 25.

"Peng Qiaqia sex CD" case, Lu Liang actress parole Xinhua BEIJING,

"Peng Qiaqia sex CD" case, Lu Liang actress parole Xinhua BEIJING,

Source: http://broadbandsports.com/node/48503

Hang gliding Others Mountain biking BMX

4duos.com Montage 5.6 June Texas Skateboarding (HD)

Source: http://www.youtube.com/watch?v=3t-Brgd8qkc&feature=youtube_gdata

Andre Englehart Andreas Trefzer Andy Kruse Angela Araujo

XSS | XTREME SPORTS SHOW KEN BLOCK GYMKHANA INVITATIONAL PART 1

Source: http://www.youtube.com/watch?v=cuMBuSmOLg8&feature=youtube_gdata

River surfing Surfing Flowboarding Skysurfing

Wednesday, May 25, 2011

Millar & de Andrade overall champions of the World Cup Skateboarding Tour 2009

Renton Millar & Carlos de Andrade became overall champions of the World Cup Skateboarding Tour 2009 at the T-Mobile Extreme Playgrounds in Berlin while 15-year-old Axel Cruysberghs (Street) and Danny Mayer (Vert) win skateboarding Events.

Source: NEWS/Skateboarding/T-Mobile_Extrme_Playgounds_Results_0548.htm

Lyn-Z Adams Hawkins Vanessa Torres Snowboarding

The Wheel Deal Part 1: Wheel Size

Many extreme sports rely on wheels of one type or another, including skateboarding, mountain boarding, inline skating, street luge, BMX and FMX. Different situations require different types of wheels, depending on the terrain and the types of riding you're doing.

My favorite extreme sport is skateboarding, so this post focuses primarily on the options available in skate wheels. But the physics involved applies to any wheeled sport.

If you skate, you know that there are lots of wheels designs on the market from tiny, rock-hard wheels for street skating to giant, gummy wheels for old school cruising. Why are some wheels better for certain uses and not so good for others? As you probably guessed - it all comes down to physics.

Wheel Size

Among the many things you need to consider in choosing the best wheel for your riding is size. Most pro street skaters opt for small wheels. It's a good choice. Small wheels are fast on smooth surfaces such as skate park concrete, wood ramps, and most of the boxes, benches and banks you're likely to hit. But on asphalt or chewed up concrete, little wheels are much slower than big wheels. Just about every skater has at one time or another had the unpleasant experience of running across a pebble or crack that stops their board dead in it's path, sending the rider for a rough tumble. Those sorts of sudden stops are more likely if you ride tiny wheels.

So, what's size got to do with it? Well, here's a little sketch to show you what's going on.

The small red cirle represents a wheel with a diameter of about 50 millimeters, typical of lots of street and park wheels. The big black circle is like a large (95 millimeter) cruising wheel. This sketch shows the wheels just as they hit the edge of a 20 millimeter step (in this picture, I'm imagining the wheels rolling to the right), which is the sort of thing you might run across as you ride over the joints between sections of a typical sidewalk.

The arrows show the direction of the force that results from the wheels hitting the obstacle. As you can see, the black arrow points up and to the left. That means some of the force pushes the wheel upward and some of it pushes back.

The red arrow is mostly pointed to the left and just a bit up, which means most of the force exerted by hitting the step goes into slowing the wheel, and the board it's attached to.

Of course, most of the bumps and cracks you'll run across in real life are a lot smaller than this. Even for smaller obstacles, though, more force will go into slowing a small wheel down than would go into slowing a larger wheel. You'll still get a force pushing the larger wheel upward, which makes for a rough ride, but at least it doesn't do as much to sap your speed (or stop you in your tracks).

If you race down a big hill made of asphalt, you end running over lots of little bumps that seriously slow small wheels, but aren't such a problem for big ones.

Are big wheels always better than small ones? Not at all. In fact, small wheels are usually MUCH faster than large wheels on smooth surfaces. Want to know why? Check out The Wheel Deal Part 2 in my next post to find out one reason that small wheels are better (sometimes).

Source: http://feedproxy.google.com/~r/blogspot/uUCU/~3/WRmZPn7vfuU/wheel-deal-part-1-wheel-size.html

Alex Broskow Andre Englehart Andreas Trefzer Andy Kruse

Milner Mile 14,000 CFS and Star Falls

The Milner Mile on the Snake River is located in-between Burley and Twin Falls, ID. The canyon is tight and constricted while dropping 100 feet in a mile. The steep gradient and large volume of water creates huge holes, massive waves, and surging eddies. Many people consider the Milner Mile to be the largest size whitewater in the Continental U.S.

The Milner Mile is shown with a CFS of 14,000 in this video. We put in on our second run with the sirens going off meaning more water was being released. After laps on the Milner we drove a short ways and kayaked off Star Falls running at 19,700 CFS. Paddlers are Eric Seymour, Gary Edgeworth, and Ted Keyes.

Cast: Eric Seymour

Source: http://vimeo.com/channels/whitewater#24099255

Free solo climbing Free fall Parachuting Bungee jumping

Sir Richard Branson to cross the English Channel

Sir Richard Branson is turning 60 and to celebrate, he's crossing the English Channel!

Source: http://feedproxy.google.com/~r/ikiteboarding/~3/29EkbSuqNQ8/virgins-sir-richard-branson-to-cross-the-english-channel-@-60.aspx

Whitewater canoeing Free diving Scuba diving Mountaineering

2011 iXS European Downhill Cup Heads To Todtnau Bike Park

The iXS European Downhill Cup will see one of Germany�s most famous venues, Todtnau Bike Park, reopen for the 2011 season. The 2.7 km long course with a 300 m altitude difference is sure to spice up the competition.

Source: NEWS/Biking/iXS_European_Downhill_Cup_2011_Todtnau_Preview_0868.htm

Cristiano Mateus Danny Way Dom Kekich Neal Hendrix

bobtrack downhill skateboarding

Source: http://www.youtube.com/watch?v=KEZ9AxKKR6E&feature=youtube_gdata

Lauren Perkins Lyn-Z Adams Hawkins Vanessa Torres

The North Face Freeskiing World Tour Heads to South America

The world�s best freeskiers are on their way to South America for the first few stops of the Freeskiing World Tour. These snowy mountains are the perfect place to fight for the event title, World Tour points, and a cash purse.

Source: NEWS/Freeskiing/The_North_Face_Freeskiing_World_Tour_Argentina_Preview_0749.htm

Matt Hoffman Aaron Feinberg Adam Kilgore Alessandra Nanni

Red Bull Cliff Diving World Series 2011 - Athens - Teaser

Looking for new heroes.

The absence of this season?s two-time winner Orlando Duque due to an injury will certainly rebound in the overall rankings. The so-called ?Sunken Lake? at Vouliagmeni will most probably be the place where a new face stands atop the podium of a Red Bull Cliff Diving World Series competition.

Source: http://broadbandsports.com/node/48496

BMX Inline skating Cliff diving Matt Hoffman

Tuesday, May 24, 2011

Time Warp - Skateboard

Source: http://www.youtube.com/watch?v=-51qROtKASE&feature=youtube_gdata

Snowboarding Sandboarding Windsurfing Kitesurfing

OZSAFAK ALADAGLAR TREKKING

Source: http://extremeactions.blogspot.com/2006/09/ozsafak-aladaglar-trekking.html

Cristiano Mateus Danny Way Dom Kekich Neal Hendrix

For Rock-Climbing Guru, the Sky Is His Roof

Charles Victor Tucker III, the harmless and stoned jester of the mountains to some and the scourge of Yosemite National Park to others, is better known as Chongo, a rock climber who wrote books on physics and now sleeps under a tractor-trailer.

Source: http://www.nytimes.com/2008/09/30/sports/othersports/30chongo.html?partner=rssnyt&emc=rss

Drifting Supercross Motorcycle rally Water sports

Human Skateboard

Source: http://www.youtube.com/watch?v=MtbQ4J3RfQ8&feature=youtube_gdata

Adams Hawkins Vanessa Torres Snowboarding Sandboarding

Matt Mayberry - Xtreme Speed on Comcast Sports

Source: http://www.youtube.com/watch?v=fAL7gmsk1Ig&feature=youtube_gdata

Windsurfing Kitesurfing Riverboarding River surfing

Icebreak 2011

Footage from Icebreak 2011 whitewater kayaking competition and event in Helsinki. All material was shot on Canon EOS 7D at 720p / 59.94 fps and most it it was slowed down to 24 fps in Cinema Tools before importing to Final Cut Pro. Music is Nine Inch Nail's Hand That Feeds which they have released for public use in Apple's Garageband format. Is the beginning too silent? It's your laptop speakers... please try headphones or better speakers.

Cast: Petri Tuohimaa

Source: http://vimeo.com/channels/whitewater#22997274

Adams Hawkins Vanessa Torres Snowboarding Sandboarding

Whitewater Grand Prix - Stage 5 - Big Wave Challenge

The Whitewater Grand Prix brings together 25 of the worlds best kayakers for a 6-stage competition on spectacular whitewater across Quebec.

Cast: Tribe Rider

Source: http://vimeo.com/channels/whitewater#23721516

Inline skating Cliff diving Matt Hoffman Aaron Feinberg

Skimming Physics

The Delaware coast has great skimboarding beaches. They're so good, in fact, that the 2007 East Coast skimboarding championships were held at Dewey Beach, Delaware a few weeks ago. My son and I stopped by after the waves died down and were too small to surf.

In case you're not familiar with skimboarding, it's one of the coolest and least recognized extreme sports. Check out this video from the 2004 championship, which was also held at Dewey Beach.

Skimboarding, surfing, wakeboarding, and kiteboarding are among the popular skimming sports. In all four sports, athletes glide across the surface of the water on one type of board or another. (Skimming is also known as planing, but who would want to practice a sport called "planeboarding?")

Most boats plow through the water, pushing the water they pass through to either side. It's tough work, which means that they move very slowly compared to the sorts of speeds we're used to on dry land. Twenty knots (about 23 miles per hour) is a pretty good clip for a boat. To go faster, or reduce the amount of energy it takes to move, watercraft have to skim.

In unpowered skimming sports, particularly surfing and skimboarding, speed is less an issue than conserving energy. The more the board pushes water aside, the more quickly the surfer or skimmer will lose energy and slow down.

So, how does skimming work? In water more than a few inches deep, a surf board or skim board glides along the surface of the water with a small angle of attack -- that means that the board is not perfectly level relative to the water surface, but instead raised up a little more at the front, and lowered down a bit at the back.

You can get the idea if you stick your hand out of the window of a moving car. Tilt the leading edge of your hand up, and you will feel lift pulling upward, tilt it down and the force pushes your hand down. (It's still called 'lift' when it pushes down, except that now it's a "negative lift" or "downward lift." I know, it's not a good term, but it's what we're stuck with because most engineers and physicists who first started looking into this stuff were interested in upward forces, not downward. In race car engineering, they tend to call negative lift "down force.")

When a surfer is moving fast on a wave you can see the trail they leave behind that results from the board pushing water straight down below the board. Unlike a boat, surfers and other skimmers don't create a v-shaped wake (at least not much of one, provided their speed is high).

A boat's wake comes from pushing water sideways, which is a very inefficient way to get around in the water. That's because, when it comes down to it, a boat's primary function is to stay afloat. Moving from place to place is secondary.

Most surfboards, skimboards, and related skimming equipment barely float at all. When surfers sit on their boards waiting for waves, their boards tend to be mostly under water.

Once they get moving, a surfboard or skimboard doesn't float so much as fly. That is, the board's buoyancy doesn't matter at all once the board is moving fast enough. What's important is the size of the board, or more specifically the surface area of the board. The more surface area available, the more lift the board will have. The more lift the board has, the slower you have to go to start skimming over the water instead of plowing through it.

The cool thing about skimboards, in contrast to all the other skimming sports, is that they also use another phenomenon to glide along. They benefit from something called the ground effect.

When skimming on a very thin layer of water, about a centimeter or so, the board pushes the water down but the ground gets in the way. Instead, it has to flow out toward the sides of the board. But water, like all fluids, resists flowing through small spaces. The term for this is viscosity. Molasses is very viscous and flows slowly, air is not very viscous and flows quickly, water is somewhere between the two.

Because of the ground effect, skimboarders can glide for a very long time over shallow water. As soon as they enter water more than a centimeter deep, the board acts like a surfboard instead of a skimboard.

The same thing happens to airplanes. When they are high up, they have lots of air below them, and they fly by pushing air down with their wings. When they come in for a landing, the air can't escape from under the wings and the plane begins to act like a skimboard on shallow water. Pilots are familiar with the ground effect. In fact, it helps when landing because it feels as though they are coming down on a cushion. On the other hand, if a novice pilot isn't prepared for the extra cushion of the ground effect, they can end up skimming over the runway and missing their landing altogether.

The ground effect makes skimboarding unique among extreme sports (or any other type of sport, as far as I know). No other sport takes advantage of this particular bit of physics.

So go skimming! It feels very cool to glide along on one of those things, and it gives you something fun to do at the beach when the waves are too small to surf.

Source: http://feedproxy.google.com/~r/blogspot/uUCU/~3/cYeGDtq4mXo/skimming-physics.html

Andy Kruse Angela Araujo Anis Iboulalen Anjie Walton

Monday, May 23, 2011

Rise of Wind Turbines Is a Boon for Rope Workers

A growing number of people who enjoy rock climbing are finding work inspecting, cleaning and repairing wind turbines.

Source: http://www.nytimes.com/2009/12/25/business/25climb.html?partner=rssnyt&emc=rss

Angela Araujo Anis Iboulalen Anjie Walton Jon Julio

Bliss Stick New Haven Race

Maxell Productions presents the Bliss Stick New Haven Whitewater Race. The race was held in Bristol VT on April 7 by Bliss Stick USA and the UVM Kayak Club.

Cast: Maxell Productions, Dayzed Productions

Source: http://vimeo.com/channels/whitewater#22994366

Anis Iboulalen Anjie Walton Jon Julio Jon Murakami

OZSAFAK ALADAGLAR TREKKING

Source: http://extremeactions.blogspot.com/2006/09/ozsafak-aladaglar-trekking.html

Paragliding Hang gliding Others Mountain biking

The 2011 Season Of The Telekom Extreme Playgrounds Starts In Duisburg

The Telekom Extreme Playgrounds is back for another spectacular season of biking in 2011. Duisburg is set to welcome a long list of international BMX and mountain bike champions, plus three bands are expected to rock the stage.

Source: NEWS/Biking/Telekom_Extreme_Playgrounds_2011_Duisburg_Preview_0823.htm

Ice climbing Rock climbing Bouldering Canyoning