Stopping the bike ASAP by laying bike down or use both brakes? Emergency Situation

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Well, coming back to topic.

What is stopping? it's like reducing the kinetic energy down to zero. Breaks and traction and whatever is made to do it faster by a transformation of kinetic energy into heat.

Now, what is the kinetic energy E = (mv²)/2

While lowsiding, a part of kinetic energy will be reduced by centrifugal force like E~mRω² (where ω-centripetal acceleration, R-radius).
Then, after letting the bike slide we reduce the bikes remaining kinetic energy as well as rider's kinetic energy by separating the mass E[remaining]=(m[bike]v²)/2+ (m[rider]v²)/2
because (if) the rider's mass is lower than bike's one, the rider will stop even faster than the released bike.

That's more about physics...

Now.
Is this the only escape in a particular situation? I don't know.
Do you (I/he/she) has enough experience to manage bike-lay-down without killing yourself? I don't know, I never tried.


:binky:
 
that video makes complete sense...since neither the guy nor the guy ride bikes, they have no clue what they are saying...if they did, they wouldn't waste their time making the video...
 
Flashmonkey said:
Anyway, if a truck jumped out in front of me in such a fashion that I couldn't brake hard enough to stop, odds are good that I wouldn't have much time to make an informed decision about braking vs initiating a low slide. My brain would do whatever the hell it could put together at the moment. I'd most likely clamp on the brakes and/or try and swerve out of the way.
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Of course when the brain senses the standard course of action will not work it will go to a plan B.

Say you're on gravel and heading toward a cliff and you know you can't stop on time. You WILL lay it down.

I'm pretty sure most of these lowsides are not planned though but a result of poor bike control resulting from panic or lack of experience or both.
 
soto said:
Of course when the brain senses the standard course of action will not work it will go to a plan B.

Say you're on gravel and heading toward a cliff and you know you can't stop on time. You WILL lay it down.
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Oh absolutely! Either that or I'd try and leap off the bike...possibly by doing some type of back flip haha.
 
Paul said:
So it makes them an idiot because they have different sexual preferences than you?

I never mentioned it was my first reaction. I mentioned I made a choice when faced with a situation. I do understand your points though...it's easy to be correct with words like "usually" "often" and "likely".
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Sexual preferences? Really?

Maybe if trying to avoid the situation was your first reaction you would have been able to avoid it.... instead of wasting precious tenths of seconds while you decided. Perhaps you are not very good at making decisions in an emergency.
 
caboose483 said:
Sexual preferences? Really?

Maybe if trying to avoid the situation was your first reaction you would have been able to avoid it.... instead of wasting precious tenths of seconds while you decided. Perhaps you are not very good at making decisions in an emergency.
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Caboose, stop flooding man!
 
slogan said:
Now, what is the kinetic energy E = (mv²)/2

While lowsiding, a part of kinetic energy will be reduced by centrifugal force like E~mRω² (where ω-centripetal acceleration, R-radius).
Then, after letting the bike slide we reduce the bikes remaining kinetic energy as well as rider's kinetic energy by separating the mass E[remaining]=(m[bike]v²)/2+ (m[rider]v²)/2
because (if) the rider's mass is lower than bike's one, the rider will stop even faster than the released bike.
Click to expand...

You can even take that concept further and push off your bike (and maybe your passenger too! lol), thus transferring even more of your energy to the bike (I guess this amount can be derived by how high you can jump).

So the final part of the equation is with the coefficients of friction. I guess if the surface is not smooth, like gravel or light vegetation you might get enough friction through your gear to make the lowside advantageous.

In the end you're just gonna do what you think will work best at the moment.
 
The scary thing about this discussion is that there are people out there that think it is actually a good idea to lay your bike down. The number of half-informed folks that "know" the front brake is to be avoided and that "know" that laying it down is an effective stopping mechanism is very worrisome. Some impressionable and un-informed people believe this crap and ride accordingly.

How anyone can think that rubber and brakes can be outdone by flesh/leather/cotton and pavement is beyond me. If you decide to get off your bike in an accident you're pretty much giving up on reducing your speed. That makes no sense. The examples given about preferring to slide into a truck than ride into it are specious. If you choose to stay on the bike and stay on the brakes you will hit at a reduced speed. If you choose to slide you're going in at full velocity. That is pretty obviously bad thinking.

Most layer down episodes are basically the rider crashing to avoid crashing.

Hmm, I can' believe I actually participated in this discussion.
 
caboose483 said:
Sexual preferences? Really?

Maybe if trying to avoid the situation was your first reaction you would have been able to avoid it.... instead of wasting precious tenths of seconds while you decided. Perhaps you are not very good at making decisions in an emergency.
Click to expand...

Yes...really...some things are for everyone...every see twogirlsonecup? ;)

And again...because my decisions are different than yours...I'm bad at making decisions?? Who made you god?
 
Griffin said:
The scary thing about this discussion is that there are people out there that think it is actually a good idea to lay your bike down. The number of half-informed folks that "know" the front brake is to be avoided and that "know" that laying it down is an effective stopping mechanism is very worrisome. Some impressionable and un-informed people believe this crap and ride accordingly.

How anyone can think that rubber and brakes can be outdone by flesh/leather/cotton and pavement is beyond me. If you decide to get off your bike in an accident you're pretty much giving up on reducing your speed. That makes no sense. The examples given about preferring to slide into a truck than ride into it are specious. If you choose to stay on the bike and stay on the brakes you will hit at a reduced speed. If you choose to slide you're going in at full velocity. That is pretty obviously bad thinking.

Most layer down episodes are basically the rider crashing to avoid crashing.

Hmm, I can' believe I actually participated in this discussion.
Click to expand...

When has anyone said to avoid the front brakes? I believe its the rear brakes that people argue about.

You are not sliding in at full velocity.
 
Griffin said:
If you choose to stay on the bike and stay on the brakes you will hit at a reduced speed. If you choose to slide you're going in at full velocity.
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If you know the collision is unavoidable your brain may choose to collide with your legs rather than your head. The way the human body collides with something has a lot to do with the severity of resulting injury - it's not just about speed. You can slip in a bathtub and die, and jump from a two story building and survive.
 
Sushii said:
When has anyone said to avoid the front brakes? I believe its the rear brakes that people argue about.

You are not sliding in at full velocity.
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Most people that argue for laying it down also preach against the front brake. The arguments seem to go hand in hand. If that hasn't been stated in this thread than that's unusual. Some other generalities about this argument (and it is a VERY old argument - I've been having it for over 30 years) are that it's mostly cruiser riders that espouse this theory.

You may not be sliding in at full velocity but it is not far from it. I've slid along the road at speed. You don't slow down much until you hit something. Compare that to the stopping distance of triple disc brakes. The conclusion should be evident.

But like religion and brand loyalty there is no way anyone will convince anyone else. I don't care about those experienced riders that think jumping off the bike is a good idea in a bad situation, I just worry about those new riders who read this crap and think it actually has some value.
 
CruisnGrrl said:
paul if you like sticking your dick in a toaster i wouldn't call it a sexual preference, more like self abuse. sticking your dick in a toaster is a good way to earn the name toaster dick.
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What if it's not plugged in?
 
dumping a bike was an acceptable option in the times of weak tires, forks, and especially brakes.
with basically all moden bikes, the braking ability is sufficient.

if you have the time to think and "lay down" (not jump off in a panic) the bike, then you had enough time to make other avoidance maneuvers.


haha. toaster dick.
 
Griffin said:
Most people that argue for laying it down also preach against the front brake. The arguments seem to go hand in hand. If that hasn't been stated in this thread than that's unusual. Some other generalities about this argument (and it is a VERY old argument - I've been having it for over 30 years) are that it's mostly cruiser riders that espouse this theory.

You may not be sliding in at full velocity but it is not far from it. I've slid along the road at speed. You don't slow down much until you hit something. Compare that to the stopping distance of triple disc brakes. The conclusion should be evident.

But like religion and brand loyalty there is no way anyone will convince anyone else. I don't care about those experienced riders that think jumping off the bike is a good idea in a bad situation, I just worry about those new riders who read this crap and think it actually has some value.
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During my first season, i low-sided in rain and just let the bike go as there it was going to plow through an intersection if i held on. I stayed practically where i let the bike go. I got a small road rash the size of a loonie because my leather jacket hitched up but that was all the injuries i sustained. Bike ended up at the other side of the intersection and stopped because of the curb, otherwise it would've kept going. Now my point is, low siding is not as bad as people think it is, you will NOT slide the same distance as your bike, you will stop before your bike. Im not saying you WILL stop faster if you choose to lowside rather then use your brakes properly and effectively to avoid an accident.

Yes but on the internet, if someone does not have the same belief as you, they think you are stupid.

P.S i was going about 70km/h.

P.S.S Just because someone has crashed does not make them a bad rider. I notice that people think i'm a bad rider just because i crashed two times during my first season.
 
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