Posted by

LamaCycles Plus

Nov 21, 2011 at 19:05

2011-11-21

Location:

Saguenay, Quebec, Canada

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270

Riding the Shipshaw Dam

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Stephane Belanger blasting down at this unique spot! Dammmmm!

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72 Comments

Score Time

+ 22

StuHaight (Nov 21, 2011 at 19:07)

Good thing he didn't slip usually those are slimy!

+ 62

mayho (Nov 21, 2011 at 19:16)

3 words...
comin.
in.
hot.

+ 16

MTBfreak612 (Nov 21, 2011 at 20:27)

surprised he didn't hydroplane there and eat it, well drink it in this case

- 70

CJbikebuilds (Nov 21, 2011 at 20:37) (Below Threshold) show comment

To hydroplane you need to be doing 70kph.

+ 86

valley-mtb (Nov 22, 2011 at 11:50)

pretty sure hydroplaning doesn't have a set speed...

+ 89

StuHaight (Nov 22, 2011 at 11:58)

Neither does being gnaaaarly.

Terrafire (Nov 22, 2011 at 12:31)

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.

+ 14

valley-mtb (Nov 22, 2011 at 13:12)

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

+ 11

mnorris122 (Nov 22, 2011 at 14:38)

he probably did hydroplane, but it didnt matter cuz he was going straight

- 31

CJbikebuilds (Nov 22, 2011 at 14:49) (Below Threshold) show comment

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.

+ 20

ShastaOutdoorMedia (Nov 22, 2011 at 15:25)

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).

- 10

StuHaight (Nov 22, 2011 at 15:44) (Below Threshold) show comment

Shasta nooooo!!!!! Make it stoop!!!! Nobody cares!!!!! Big Grin

+ 10

ShastaOutdoorMedia (Nov 22, 2011 at 16:23)

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.

Terrafire (Nov 23, 2011 at 8:41)

Definitely did NOT just wiki that... I just thought you could make a formula from those. Engineering student here as well.

mnorris122 (Nov 23, 2011 at 9:55)

You can make a formula, it just differs depending on the weight, size of where contact is occuring, areodynamics, weight distribution, etc of
he vehicle in question

VictorMAAS (Dec 11, 2011 at 2:56)

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

I-am-John (Dec 11, 2011 at 3:52)

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

deviz (Dec 11, 2011 at 4:06)

There is no "set" speed at which hydroplaning "starts"...
Right.
The point is contact area and pressure ...Believe me, I just had it in college Smile

greets

BR3N (Dec 11, 2011 at 4:09)

whats hydroplaning?

N1l0c (Dec 11, 2011 at 4:37)

Surely such an equation would involve some really really gnarly surface integrals, one that would probably be impossible to analytically solve.

+ 14

mayho (Dec 11, 2011 at 6:46)

the answer is 7.

+ 23

tom-cuthbert (Dec 11, 2011 at 6:47)

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.

mayho (Dec 11, 2011 at 6:49)

dont do drugs kids!

+ 13

tom-cuthbert (Dec 11, 2011 at 6:53)

'Cause drugs are bad mmmmmmm'kaaaay.

mayho (Dec 11, 2011 at 6:54)

hahah EXACTLY what i was saying when i typed this. champ

onetimetwotime (Dec 11, 2011 at 7:41)

YO. Sick spot for urban kayaking

BLIPDH (Dec 11, 2011 at 13:23)

this entire conversation is why i love pinkbike

mayho (Dec 11, 2011 at 13:36)

guys it says keep it civil... not fluid eng.

- 11

jk-mrdck420 (Dec 11, 2011 at 14:02) (Below Threshold) show comment

f*ckin nerds dude. 18 messages about hydroplaning and physics?
go discuss this in another website.

sick little spot tho

mayho (Dec 11, 2011 at 14:06)

engineers nerds?
you should come to our crazy parties...
oh wait, you cant.
Smile

Terrafire (Dec 11, 2011 at 16:01)

Engineering parties:

http://uniquenewwork.wordpress.com/2009/05/25/ubc-egineer-students-toss-vw-beetle-off-iron-workers-memorial-bridge/

Jory979488 (Dec 11, 2011 at 18:08)

LMAO

CJbikebuilds (Dec 11, 2011 at 18:52)

That was a UBC prank, right?

Edit: Yeah, it just said UBC.

finnrambo (Dec 11, 2011 at 19:10) (Below Threshold) show comment

bikes cant hydroplane.......

mayho (Dec 11, 2011 at 19:16)

depends on you blood alcohol content.

finnrambo (Dec 11, 2011 at 19:33)

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

mfv97 (Dec 11, 2011 at 19:41)

great another useless and totally worthless conversation that has noting to do with the vid. Keep it up boys!!

valley-mtb (Dec 11, 2011 at 19:47)

Your comment was useless and totally worthless to this conversation.

mayho (Dec 11, 2011 at 19:48)

i like onion rings.

StuHaight (Dec 11, 2011 at 20:10)

Only wizards can hydro plane on bikes.

QCIrider77 (Dec 11, 2011 at 22:21)

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.

Ryan1234 (Feb 24, 2012 at 15:02)

Or its just a little puddle, where u don't need to hydroplane to get over ? lulz

[Reply]

HM78 (Dec 11, 2011 at 3:03)

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.

[Reply]

Aug101 (Dec 8, 2011 at 18:57)

How did he not make any tire tracks after going through the water??

sysavage (Dec 11, 2011 at 8:01)

Magic?

LamaCycles Plus (Dec 11, 2011 at 10:19)

http://www.pinkbike.com/video/229389

JHewitt (Dec 11, 2011 at 11:24)

you just linked to this video Razz

badkid (Dec 11, 2011 at 14:53)

i love how the pod came from that spot

[Reply]

amateurbiker73 (Dec 11, 2011 at 20:25)

OH my god it wouldnt hydroplane because the tires would cut through the water

[Reply]

thomas-3 (Feb 9, 2012 at 19:53)

Shut up about the stupid hydroplaning nobody gives a crap this is biking not college

[Reply]

bubbakona998877 (Dec 11, 2011 at 23:28)

i could get that much speed on a razor scooter :3

[Reply]

eastcouleeski (Dec 11, 2011 at 11:49)

not put a litle lip up there and fly!

[Reply]

nail2529 (Dec 11, 2011 at 14:59)

sick that would be f**king epic with a motto pull in or something

[Reply]

angrynipples (Nov 22, 2011 at 0:18)

that was wayyy gnarlier than i thought it was going to be.

[Reply]

kabirsdhillon (Nov 22, 2011 at 10:00)

thats a nice spot for riding Big Grin

[Reply]

senditfilms Plus (Nov 21, 2011 at 19:13)

sick spot

[Reply]

ride-dartmoor (Dec 11, 2011 at 20:10)

Everyone needs to settle down and enjoy a good ol' bike video.

[Reply]

Dallll (Nov 21, 2011 at 19:18)

daaaaaaammmmmmmmmmmmm

[Reply]

SHARK555 Plus (Dec 11, 2011 at 23:05)

OMG! He's a ghost!

[Reply]

theheckler (Nov 21, 2011 at 19:06)

facinating

[Reply]

TYNT (Nov 21, 2011 at 19:22)

Just rippin

[Reply]

kinkdirtjumper96 (Nov 21, 2011 at 19:32)

thats so unreal so dope!

[Reply]

konaman12784902338dirtjumper4 (Nov 21, 2011 at 19:06)

thats sick

+ 24

mnorris122 (Nov 22, 2011 at 14:38)

.....nice username

Konanemia (Nov 25, 2011 at 11:10)

mine is better okno

[Reply]

kanioni (Nov 22, 2011 at 8:45)

So much awesomeness!

[Reply]

NORCORIDERxPRO (Nov 24, 2011 at 12:26)

i wanna try that...sweet

[Reply]

lovethedirt (Nov 21, 2011 at 20:25)

lmao "Dammmmm!"

[Reply]

Mongoose350 (Nov 29, 2011 at 13:53)

c'Est dans mon bout ca!

[Reply]

kinkdirtjumper96 (Nov 24, 2011 at 11:49)

lol

[Reply]

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