TandemJeremyNow unless the porsche can stop from 70 mph in under 30 m with a 65 m gap you are safe (30+65=95)
Okaaaaaay 🙂
Another quick google reveals that a 2007 911 GT2 can stop from 60mph - 0 in 30 metres. A figure apparently recorded by Porsche.
Although I cant find any figures to back it up I reckon it's entirely plausible (considering the increased contact patch that other super cars with larger tyres would have never mind downforce, better brakes, lighter weigh etc) that another road car could, from 70mph stop in 30m. Sorry, I'll stop now. Or start a threa in the chat forum along these lines.
Do you think the helmet contributed to her horrific injuries? 😯
If someone launched a bike at me like that they would be wearing the ****ing thing a few seconds later.
+1. ****ing right an' all.
She made a mistake, stopped suddenly, then got all pissy because she felt stupid. She milked that for all it was worth, acting all hurt like that. I mean, she had all that body armour on ffs! Stupid cah. She wouldn't want to ride around in London, if she's that highly strung.
Maybe the feller could've slowed down more, but he had already slowed down loads anyway.
If she'd thrown the bike at me, I'd've battered it to death with a rock, screaming at her 'Run! You're next!'
At this point I may have stripped off naked and let the warm blood of a freshly killed animal drip all over my body.
Then praps had a nice cigarrette. Or a pasty or something. See what she had to say about [i]that[/i].
for people commenting about the armour, judging by the bikes they were at a lift assisted downhill park and a lot of the blue trails at them are relatively smooth as thats what a lot of people like to ride, it means they can go fast, you mostly have to go on the blacks to get the gnar and big jumps etc
I would've done it on me shonky rigid hybrid. With a rack and panniers with me shopping in. Overtaken all of them without crashing, then been at the bottom waiting for them.
Smoking a nice ciggie.
And I wouldn't be dressed head to toe in ****ing stormtrooper body armour, either.
Pfft...
Ban whining Yank women from trail centers 😉
Yes he should'nt have gone up the back of her but what a
CRAZY BITCH, why stop suddenly in the middle of the trail? No sign of a mechanical, no shout of stopping etc.
Bloke was a bit too reasonable if you ask me.
She braked at the sight of that tiny little tree root.
He had a ton of space to go round on the right without any problem, or left if he could get over the stupid wooden kerb thing.
I guess if you put enough idiots together in the same place, bad things are going to happen.
I guess if you put enough idiots together in the same place, bad things are going to happen.
Is that a reference to this place? 😉
What deserter said. Also helmet cam footage of a trail *[b]rarely[/b]* conveys how it rides, and the blue grading across the atlantic is a little different to the blue grading here.
Karate Monkey is a blue and the helmet cam footage in no way conveys how much fun it is to ride.
Still, I think she over reacted a little. 🙂
I'd have thrown the bike back at her.
In no way is she blameless either.
He made her do a wheelie when he hit her... *s****s*
I think I wouldn't have hung around, I would have just got on my bike and pissed off.
BTW for all the armour comments, that track may just be a lead in to some gnarly rad stuff, I for one don't stop and take my armour off every time the trail goes over a flat bit.
20mph on gravel and stopping in 5 meters..... you're kidding right? you obviously dont weigh over 14stone TJ!
even if i rode into a wall at 20mph i think i'd travel over 5 meters wrapped in bricks.
*must lose weight and increase braking efficiency before riding with americans*
even if i rode into a wall at 20mph i think i'd travel over 5 meters wrapped in bricks.
😆
If he hadn't had his iPod on so loud, he might have noticed her. BeeGees too, tsssk... 😉
what a total overreaction by the girl, admittedly if you're bricking it in the first place and then take a tumble emotions are probably high but still hitting the guy with your bike? i cant believe she tried to say he'd broken her leg!
the guy was far too nice, maybe he should have read the signals a bit better but if any of those people had access to that headcam video her audience would have rapidly dwindled.
maybe she should have spent a bit longer on fire roads.
Do these stopping distance calculations include reaction times too?
Initially when I watched it I agreed with people thinking stupid woman for stopping in the middle of the trail. Then I watched it again and saw that he had a real good view of the group in front as he approached them and it was obvious they were novice riders. So he should have been a bit more considerate.
As for comments about blue trails, Crank it Up in Whistler is a blue trail (I think) and you can get plenty of air on that. Also they might be riding a blue on there way to a double black diamond of doom.
Bazzer
it was obvious they were novice riders.......they might be riding a blue on there way to a double black diamond of doom.
Does not compute!
I would have just bunny hopped her. No one has any skill these days.
Does not compute!
Oops that probably did not make sense. I meant comments about blue trails and body armour. They could be on route to something more gnar 🙂 !!!
If you're looking to overtake someone travelling slower than a slow thing you need to be pretty close, but you don't expect them to stop for no apparent reason, there was probably just enough room to ride around the outside of her. After watching it a few times it begins to look a bit staged.
I'd have said 50/50 but the more she ranted, the more I felt it was her fault! I was impressed at how she managed to stand up and swing her bike at him with the broken leg she claimed to have! He didn't look to be going that fast and what ever speed he was doing, he slowed down behind them. It looked to me like her dead stop came as a total surprise. As for being too close, well, that's try when following but you do actually have to get closer if you're following someone.
As for her reaction, don't they have animal control for such feral creatures?
nice tag 🙁
How he kept so calm I don't know. Fair play to him.
She was stupid to stop in the middle of a fast trail. It showed a lack of awareness. If you're going to stop pull to the side and have a quick check over your shoulder first.
philconsequence - Member20mph on gravel and stopping in 5 meters..... you're kidding right? you obviously dont weigh over 14stone TJ!
Weight is irrelevant as it means more grip - and grip is the limiting factor not your brakes
5 m stopping distance from 20 mph on gravel is easy - if you know how to use your brakes and if your brakes are in good condition
By gravel I meant the trail centrer surface - not loose deep gravel of course
You would be surprised how quickly you can stop given decent technique
bunch of pansies.... end of.
Yeah the guy at the back should not have been close enough to rear end her. But give him a break, If you are going to stop dead, not slow down for a technical section but stop dead, do it at the side of the trail. If you stop in the middle of the trail you should expect a problem or be causing one I reckon.
Anger management training is required and I reckon the guy at the back can give it. I would have lost it well before he moved on.
Weight is irrelevant as it means more grip
It also means more kinetic energy (directly proportional), no idea if grip is also directly proportional. Complicated I suspect.
TandemJeremy - Member
You would be surprised how quickly you can stop given decent technique
Would a bit of front wheeel-lock have sorted everything out? 😀
He hit her his fault, hit her pretty hard too causing her to wheelie. She's either a noob or a mincer he could see that on his approach, going pretty slow on a tame looking section, should have slowed wayyyy down and maybe politley let her know he was there - squeely brakes are good for this, she had a full facer and by the looks of it was half scared to death no way is she gonna notice someone behind her.
Seems pretty strong over reaction from her, I'd be pretty freaked if a car hit me from behind, I like to think I'd cut another rider some slack...dunno tho.
It [b]was[/b] a good way to make sure he had a clean run at the rest of the trail 🙂
Oof, looks like she was in a bit of a grumpy mood anyway. Maybe she hates MTBing but her boyfriend makes her do it.
His fault in law I'm sure, but you have to sympathise.
Weight is irrelevant as it means more grip - and grip is the limiting factor not your brakes
Teej I think you keep forgetting you are a nurse and not an engineer.
Toys - on gravel is grip not the limiting factor and grip is proportional to the weight on the wheels? Yo will skid before yo run out of power int eh brakes assuming brakes in decent condition?
So no front wheel lock then?
has no one noticed she braked literally just after a small drop down? He hit that at the moment she braked so he pretty much landed on her back wheel.
How the **** is he meant to brake in that situation ?
No doubt in mind she really hauled on the anchors & I mean like grabbed a fistful of both! Having said that he should have given a her a shout that he wanted to pass & not tried it on a bend.
And what the **** was with all wounded soldier sh1t she was trying to pull. Ok I know shock but come on!
Well I would say it's her fault. Yes he was quite close but nobody expects someone to stop suddenly like that. Also I think he's too nice, I probably would've just checked she/the bike wasn't seriously hurt then ****ed off and enjoyed the rest of my day 😆
her throwing the bike at him in that situation could be considered assault with a weapon get her done!!
also the point about it being a "team building day" given all the protection kit etc would mean she had signed a disclaimer stating she would be undertaking a "extreme" sport so she couldnt sue him!!
I'd say they were both partly to blame. If i was going down a busy trail and knew that there was someone behind me, if I slammed on my brakes without making any signal or moving over I would expect to be whacked. Stopping slap bang in the centre of the trail is just stupid.
But, it didn't look like he tried that hard to stop in time; I am not sure he was paying full attention.
She completely over reacted and didn't really appear injured until her mates showed up. She was completely unreasonable, especially considering how apologetic he was.
TJ - I'm not so sure you could stop in 5m on a gravel trail travelling at 20mph.
20mph is 9.1m/s which would mean you'd have to stop in 1.1s using S=1/2(U+V)T where S=5m, U=9.1m/s & V=0. Working out your acceleration once you have the time, you'd have to decelerate at 8.72m/s^2 which is nearly 1g.
Looking online, various sources reckon the best sports cars achieve 1 to 1.5g while braking (the Veyron is apparently 1.3g) and presumably that's on a tarmac surface.
(sorry, I'm a bit bored)......... 🙂
It's entirely his fault because he should be viewing the rider in front as a moving obstacle and be prepared to slow or stop (as required) depending on what it does. You don't try to pass people, on any grade of trail, unless they let you go - which is really the only way you know for certain that they know that you are there and what you are about to do. If somebody is crawling along the trail it's just tough sh*t: your flow is gone and you just have to try again next time.
That said, the rider he hit was, obvious shock aside, excessively vexxed. And the other riders who started giving the bloke grief should all just have STFU. They didn't help the situation at all, to the point that they could actually have made it worse. His apologies should have been only for the person he hit, not the circling drama queens/vultures looking for an excuse to vent.
He's in the wrong, cos he rear-ended her.
Having said that, if you pick up your bike and hit me with it then expect me to take it off you and launch it as far away as possible. Crazy witch.
Ahh you forget about the effect of the mass on your momentum and how the brakes will have to work that much harder to bring the wheel to a stop? Assuming you are applying the same force at the lever the brakes will be less effective.
There are a few other refutations of this well worn misconception but this is the main one.
Stick to nursing.
no shortage of idiots in the asylum today then.
