 killyourface
Male, 18-29, Western US
 5 Posts
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Sunday, May 06, 2012 5:19:35 PM
@tkd_master - Following (as closely as he was) behind that 18 wheeler reduces wind speeds by 85% |
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 Seak
Male, 18-29, Europe
1505 Posts
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Sunday, May 06, 2012 8:15:20 AM
Man that would have to suck for him if the truck has to break immediately. |
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 mlsilver22
Female, 18-29, Southern US
16 Posts
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Saturday, May 05, 2012 7:38:27 PM
things like this are why i hate bicycle riders, especialy the "pro" riders. they are always in the way and doing something stupid. |
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 lawndartsftw
Male, 40-49, Canada
1815 Posts
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Saturday, May 05, 2012 6:13:07 PM
@5Cats - would there be enough left to donate ?? |
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 Draculya
Male, 30-39, Asia
6696 Posts
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Saturday, May 05, 2012 6:05:45 PM
"How can he be going that fast on a bike? Somebody please explain this."
For objects travelling in a fluid at low velocities characterised by a low Reynolds number (Re<1), drag force is roughly proportional to velocity. As velocity increases, so does drag force (Fd), until further acceleration due to propulsion force (Fp) is no longer possible as Fd approaches Fp. Drafting in the burble behind a large moving truck reduces the effective Fd so that the equilibrium point Fd=Fp occurrs at a higher velocity.
Youtube video
John Howard (not the politician) earned a world speed record cycling at 152.2mph while drafting. You wouldn't want to lose control at that speed in bike shorts. |
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 TKD_Master
Male, 18-29, Midwest US
4827 Posts
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Saturday, May 05, 2012 5:24:09 PM
How can he be going that fast on a bike? Somebody please explain this. |
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 Angilion
Male, 40-49, Europe
9677 Posts
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Saturday, May 05, 2012 5:21:49 PM
Definitely cool, but the guy is a total idiot. No helmet, really??? A wipe out at those speeds and his brain is splattered all over the highway. It would be bad enough with a helmet, but without it's just a death wish.
A bicycle helmet wouldn't make any useful difference at that speed.
It might make a difference if the combined speed was much lower. Say, for example, the lorry suddenly slowed to 50. He'd hit it at ~15mph and then a helmet would matter...although he'd probably then hit the road at ~50mph and the helmet wouldn't matter.
It's a striking display of how much difference drafting can make to a cyclist, but it's a damn silly thing to do. |
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 turdburglar
Male, 30-39, Western US
1955 Posts
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Saturday, May 05, 2012 12:09:33 PM
Why wear a helmet. He doesn't have much smarts to protect with one. Why is it that bicycle riders feel that they dont have to follow the law? And why does anybody have sympathy when one dies? |
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 5Cats
Male, 40-49, Canada
17496 Posts
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Saturday, May 05, 2012 11:19:29 AM
How did he... oh nevermind. Not the brightest move, eh? One little bump and... organ donor! |
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 Ant0n
Male, 18-29, Midwest US
842 Posts
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Saturday, May 05, 2012 10:28:21 AM
He should have cut in front of the truck so it would have to slam on breaks |
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 a103276
Male, 18-29, Europe
176 Posts
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Saturday, May 05, 2012 9:59:19 AM
Is this a suicide attempt?! |
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 coolthing97
Male, 13-17, Southern US
1015 Posts
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Saturday, May 05, 2012 9:58:17 AM
poo. That guy's crazy. |
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 freddyferret
Male, 40-49, Midwest US
9911 Posts
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Saturday, May 05, 2012 9:28:40 AM
Definitely cool, but the guy is a total idiot. No helmet, really??? A wipe out at those speeds and his brain is splattered all over the highway. It would be bad enough with a helmet, but without it's just a death wish. |
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gherwrull
Male, 30-39, Southern US
25 Posts
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Saturday, May 05, 2012 9:13:05 AM
He could just reach up and grab hold instead of peddling. |
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 jtrebowski
Male, 40-49, Southern US
3062 Posts
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Saturday, May 05, 2012 9:12:16 AM
I guess this guy has some sort of deat-wish, not to mention, it kinda defeats the point of getting some EXCERSISE! Anyway, did anyone else think of the movie "Breaking Away" when they saw this? |
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 ledzeppeloyd
Male, 18-29, Midwest US
2197 Posts
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Tuesday, May 01, 2012 5:00:21 PM
Link: Drafting Like a BOSS! [Rate Link] - Drafting at 60 miles an hour on the highway, no big deal. |
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