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Old 08-14-2015, 07:56 AM   #1
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Motorcycle Physics - nerd alert

Interesting article on motorcycle physics basics from Wired magazine of all places...

HOW DO MOTORCYCLES LEAN SO FAR WITHOUT TIPPING OVER?

http://www.wired.com/2015/08/motorcy...thout-tipping/
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Old 08-14-2015, 08:07 AM   #2
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In short, leaning the bike allows there to be a gravitational torque to balance the torque from the fake force. Leaning prevents you from falling over. I know that seems strange, but itís true.
If Rhett Allain (the author) was a rider he'd know that one doesn't lean a motorcycle. A rider points the motorcycle in the direction he wants it to go and the bike leans itself in a direct relation to steering angle and speed.
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Old 08-14-2015, 08:13 AM   #3
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Old 08-14-2015, 08:20 AM   #4
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Originally Posted by jimrad View Post
.
If that pic is legit he turned the bike before he took his hands off the grips
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Old 08-14-2015, 08:22 AM   #5
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If that pic is legit he turned the bike before he took his hands off the grips
That is r6racer. It is indeed lagit..
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Old 08-14-2015, 08:28 AM   #6
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That is r6racer. It is indeed lagit..
That's him, but his FB reply reads "Im jk I didnt do that"
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Old 08-14-2015, 08:34 AM   #7
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If Rhett Allain (the author) was a rider he'd know that one doesn't lean a motorcycle. A rider points the motorcycle in the direction he wants it to go and the bike leans itself in a direct relation to steering angle and speed.
Bevo.... I don't know about the bike leaning itself. I exert an awful lot of force on the clip on to get the bike to rapidly transition. I suspect racers exert way more force than I would. Arm pump is caused by something.
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Old 08-14-2015, 08:47 AM   #8
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Bevo.... I don't know about the bike leaning itself. I exert an awful lot of force on the clip on to get the bike to rapidly transition. I suspect racers exert way more force than I would. Arm pump is caused by something.
Exactly, you have to apply a force to the steering (bars, clip-ons) to point the bike, the lean takes care of itself in a direct relation to the steering angle (the direction you've moved the front wheel) and speed. I point the bike where I want it to go. I don't try to calculate how much I need it to lean
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Old 08-14-2015, 09:21 AM   #9
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Exactly, you have to apply a force to the steering (bars, clip-ons) to point the bike, the lean takes care of itself in a direct relation to the steering angle (the direction you've moved the front wheel) and speed. I point the bike where I want it to go. I don't try to calculate how much I need it to lean
But how come you point the wheel one way, the the bike goes the other way? Where's your physics now, bro? That's what I thought.
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Old 08-14-2015, 09:23 AM   #10
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But how come you point the wheel one way, the the bike goes the other way? Where's your physics now, bro? That's what I thought.
You're right, that's more geometry.
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Old 08-14-2015, 09:34 AM   #11
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Old 08-14-2015, 09:34 AM   #12
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But how come you point the wheel one way, the the bike goes the other way? Where's your physics now, bro? That's what I thought.
You're still pointing the bike in the direction you want it to go.
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Old 08-14-2015, 09:39 AM   #13
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Pointing the wheel the opposite way is just another method of inducing a "fake force." Or adding more friction force. Depends on how you want to look at it, it's all relative. The article only touch on the simplest explanation of the physics.
Witchcraft.
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Old 08-14-2015, 10:00 AM   #14
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Holy I just read that article and it is absolutely terrible. I thought Sudo was bullshitting with the term "fake force". Then I saw the author use it. That's... Not a thing. I don't even know where to start. This was such a tragically awful explanation and any physics professor would cry after having read it.
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Old 08-14-2015, 10:05 AM   #15
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Quote:
Originally Posted by Repth View Post
Holy I just read that article and it is absolutely terrible. I thought Sudo was bullshitting with the term "fake force". Then I saw the author use it. That's... Not a thing. I don't even know where to start. This was such a tragically awful explanation and any physics professor would cry after having read it.
Send him a Kleenex
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Rhett Allain is an Associate Professor of Physics at Southeastern Louisiana University. He enjoys teaching and talking about physics. Sometimes he takes things apart and can't put them back together.
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Old 08-14-2015, 10:09 AM   #16
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Oh , that's so not ok.
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Old 08-14-2015, 12:21 PM   #17
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chris 5.0 did that picture with photoshop, you can tell it is immediately but here is the original photo. also i think i could do the no hand thing long enough to grab a picture real quick. max out the steering damper and hold on tight with my legs. idk i'll have to try it

https://www.facebook.com/photo.php?f...type=3&theater
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Old 08-14-2015, 12:25 PM   #18
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max out the steering damper and hold on tight with my legs, highside.
Fixed
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Old 08-14-2015, 12:25 PM   #19
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Holy I just read that article and it is absolutely terrible. I thought Sudo was bullshitting with the term "fake force". Then I saw the author use it. That's... Not a thing. I don't even know where to start. This was such a tragically awful explanation and any physics professor would cry after having read it.
Fake force or imaginary force is a term used in my college physics courses. Then again, I am state school educated. Maybe they don't teach it in those fancy colleges.
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Old 08-14-2015, 12:27 PM   #20
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Fixed
nah aint nobody got time fo dat
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