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Riding the Shipshaw Dam

Stephane Belanger blasting down at this unique spot! Dammmmm!


  • + 23
 Good thing he didn't slip usually those are slimy!
  • + 66
 3 words... comin. in. hot.
  • + 16
 surprised he didn't hydroplane there and eat it, well drink it in this case
  • - 76
flag CJbikebuilds (Nov 21, 2011 at 20:37) (Below Threshold)
 To hydroplane you need to be doing 70kph.
  • + 88
 pretty sure hydroplaning doesn't have a set speed...
  • + 91
 Neither does being gnaaaarly.
  • + 8
 Im pretty sure it would be easy to make a formula based upon the bike + rider weight, acceleration due to gravity, drag due to wind and water, velocity of the rider, and surface area of the tires in contact with water.
  • + 13
 Alright, do that and get back to us. You can kinda tell you just wiki'd that too - if you knew physics you wouldn't be talking like that lol
  • - 33
flag CJbikebuilds (Nov 22, 2011 at 14:49) (Below Threshold)
 Hydroplaning does have a set speed, actually. It's 70kph for cars I know that for sure. Bikes may be different but I can't say for sure.
  • + 21
 There is no "set" speed at which hydroplaning "starts". It depends not only on speed but also on the pressure the area contacting the water exerts (i.e. a boat technically is "hydroplaning" at all speeds because it floats).
  • - 11
flag StuHaight (Nov 22, 2011 at 15:44) (Below Threshold)
 Shasta nooooo!!!!! Make it stoop!!!! Nobody cares!!!!! Big Grin
  • + 11
 I'm sorry, my perspective on reality has been warped by being here at the world's #1 public uni for engineering... Razz SUCK IT!!! WOOO.
  • + 6
 Definitely did NOT just wiki that... I just thought you could make a formula from those. Engineering student here as well.
  • + 6
 Of course you can Smile . But not if you don't take the tire tread into account: massively important factor. Especially for a car, if you fit some regular car with slicks you can make it hydroplane at as low as...I donno, 40mph?

When it's raining really heavy, when there is a good layer of water on the highway, check out the spray of water other cars' tires are creating. You can see huge differences in how they handle the water. Some have very little spray forwards and sideways and seem to be riding through effortlessly, while other tires are already pushing massive amounts of water forwards, in front of themselves. They look like a boat ploughing through inefficiently. It's real easy to tell who's going to hydroplane first.

btw. Aerodynamics/'wind drag' don't matter shit. If you are going fast enough to aquaplane, you are going to, whether the wind is blowing with 300mph or not. It matters only when you want to know what's going to happen after you have started hydroplaning. Which would be a massively complicated differential equation Smile .

Trust me, I'm an Engineer :p
  • + 4
 you were going so well up until the last paragraph. aerodynamics would increase the speed that aquaplaning takes place. increasing downforce would increase the pressure on the tires thus resisting the force of the water trying to get underneath the wheel and lift the car up.

Also an engineer Wink

Also cool pic Big Grin
  • + 1
 There is no "set" speed at which hydroplaning "starts"...
The point is contact area and pressure ...Believe me, I just had it in collegeSmile
greets Wink
  • + 11
 whats hydroplaning?
  • + 1
 Surely such an equation would involve some really really gnarly surface integrals, one that would probably be impossible to analytically solve.
  • + 15
 the answer is 7.
  • + 25
 I'm not an engineer or anything, but I definitely know what hydroplaning is. It's when you place two rabid squirrels in an arena together with combat-knives and stake bets on who will win first, then you take the winning squirrel, crown him as your king and form a religion around him and anyone who doesn't like it gets put into the ring with the squirrel-king and fights to the death, eventually you gather all the bones of the defeated heretics and create a bone-castle for the squirrel king to live in and fornicate with the other bangin' hot squirrel chicks. True story.
  • + 6
 dont do drugs kids!
  • + 13
 'Cause drugs are bad mmmmmmm'kaaaay.
  • + 2
 hahah EXACTLY what i was saying when i typed this. champ
  • + 3
 YO. Sick spot for urban kayaking
  • + 3
 this entire conversation is why i love pinkbike
  • + 3
 guys it says keep it civil... not fluid eng.
  • - 12
flag gloryrida (Dec 11, 2011 at 14:02) (Below Threshold)
 f*ckin nerds dude. 18 messages about hydroplaning and physics?
go discuss this in another website.

sick little spot tho
  • + 7
 engineers nerds?
you should come to our crazy parties...
oh wait, you cant.
  • + 3
  • + 1
 That was a UBC prank, right?

Edit: Yeah, it just said UBC.
  • - 5
flag finnrambo (Dec 11, 2011 at 19:10) (Below Threshold)
 bikes cant hydroplane.......
  • + 3
 depends on you blood alcohol content.
  • - 3
 at least road bikes cant.... i've gone way over 80 in the rain and I was fine.... damn cold though in that short sleeve jersey
  • - 1
 great another useless and totally worthless conversation that has noting to do with the vid. Keep it up boys!!
  • + 4
 Your comment was useless and totally worthless to this conversation.
  • + 2
 i like onion rings.
  • - 1
 Only wizards can hydro plane on bikes.
  • + 1
 Hydroplaned in a car that was only doing 60km/ph so yah, it is pretty easy to hydroplane, it has to do with the amount of water between your tires and a surface, the water essentially creates a frictionless barrier and you fly around the place. Not so much to do with speed.
  • + 1
 Or its just a little puddle, where u don't need to hydroplane to get over ? lulz
  • + 1
 about the lack of tiretracks left on the concrete... take a better look , they are there.. not tripping , but hey are skinny.. maybe cause of high tire-pressure? higher tire-pressure would also lower the risk of aqua-planning i guess.
  • + 1
 Shut up about the stupid hydroplaning nobody gives a crap this is biking not college
  • + 1
 OH my god it wouldnt hydroplane because the tires would cut through the water
  • + 2
 How did he not make any tire tracks after going through the water??
  • + 2
  • + 1
 you just linked to this video Razz
  • + 1
 i love how the pod came from that spot
  • + 1
 thats a nice spot for riding Big Grin
  • + 1
 i could get that much speed on a razor scooter :3
  • + 1
 sick that would be f**king epic with a motto pull in or something
  • + 1
 not put a litle lip up there and fly!
  • + 1
 that was wayyy gnarlier than i thought it was going to be.
  • + 2
 mine is better okno
  • + 1
 sick spot
  • + 0
 So much awesomeness!
  • + 0
  • + 0
 i wanna try that...sweet
  • + 0
 c'Est dans mon bout ca!
  • + 0
 lmao "Dammmmm!"
  • + 0
 thats so unreal so dope!
  • + 0
 Just rippin
  • + 0
  • - 1
 Everyone needs to settle down and enjoy a good ol' bike video.
  • + 0
 OMG! He's a ghost!
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