Timeline for How does tilting a bike make it turn sharper?
Current License: CC BY-SA 4.0
29 events
| when toggle format | what | by | license | comment | |
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| Apr 1 at 1:45 | answer | added | KDP | timeline score: 1 | |
| Mar 25, 2019 at 18:52 | vote | accept | AlphaLife | ||
| Jul 27, 2018 at 17:41 | comment | added | leftaroundabout | @jamesqf I know, I used to find that curious too, but then I watched closely and noticed that the handlebars are slighly turned even in big, fast curves, just the angle is smaller than the leaning angle so you don't notice. | |
| Jul 27, 2018 at 17:38 | comment | added | jamesqf | @leftaroundabout: I don't think that's the case. From several decades of practical motorcycle riding experience (and even more bicycle), I know that - strange as it may seem - you don't actually turn the handlebars in order to turn. (Except at very slow speeds.) I've never tried to work out the physics, perhaps due to a subconscious worry I'd be like the centipede who tried to explain how he controlled all those legs :-) | |
| Jul 27, 2018 at 12:04 | comment | added | Pᴀᴜʟsᴛᴇʀ2 | I think most have missed the real point and where the answer lies: The bike isn't necessarily making a corner or turning; the bike is climbing out of the curve. By tilting the bike over, a higher point on the tire contacts the ground with less change in turning angle of the front wheel itself. This higher contact helps the bike climb out of the corner quicker, which means it makes the turn faster and tighter. | |
| Jul 27, 2018 at 7:48 | comment | added | AlphaLife | @jamesqf Note that you can get the wheels in a line in a well of death. | |
| Jul 27, 2018 at 7:43 | comment | added | leftaroundabout | @jamesqf the wheels aren't in a straight line. Just the angle is too small to be seen in the picture, because the curve radius is so much bigger than the wheelbase. | |
| Jul 27, 2018 at 0:37 | answer | added | rcgldr | timeline score: 2 | |
| Jul 26, 2018 at 21:58 | comment | added | NonCreature0714 | Following up to that, if a rider turns the wheel into the turn, the bike tumbles. | |
| Jul 26, 2018 at 21:54 | comment | added | NonCreature0714 | One thing people miss is the friction radius, by which I mean the area of the tire in contact with the road having friction and torque, of the front and rear tires is variable (reducing) where the tires contact the pavement as the bike leans, producing different torque and friction (at the very least) at different degrees of lean. Additionally, riders are actually pressing the front forks AWAY from the direction of the turn, reducing the friction radius of the front tire even further. I don’t have the math or physics background to answer well, so hopefully someone else can take it from there. | |
| Jul 26, 2018 at 20:15 | comment | added | JimmyJames | @jamesqf I have. And I have noted this on the most upvoted answer (which is pretty obviously incorrect.) I'd be interested in comments related to the reference that is in the latest comments on my answer. I think it might have the real answer but I'm not sure I'm interpreting it properly. It also differs substantially from my answer as it stands.) | |
| Jul 26, 2018 at 16:09 | comment | added | jamesqf | I wonder if anyone else has noticed that the wheels of the bike in the picture are in a straight line? | |
| Jul 26, 2018 at 14:38 | comment | added | J... | Most of the answers below miss the critical element of angular momentum. A complete analysis would be challenging for most physicists and difficult to understand for pretty much everyone. | |
| Jul 26, 2018 at 10:15 | history | edited | AlphaLife | CC BY-SA 4.0 |
Removed unnecessary dialogues.
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| Jul 26, 2018 at 9:57 | comment | added | David Z | I've deleted some comments that seemed to be answering the question. Please keep in mind that comments are meant for suggesting improvements or requesting clarifications. | |
| Jul 26, 2018 at 8:23 | comment | added | Michael Kay | My great-uncle, a physicist by training, had to give up cycling in his 80s and bought himself a tricycle instead. He had great fun letting his grandchildren have a go on it, because the steering was so counter-intuitive and they always went round in circles. Some of the complexities are explained here: eland.org.uk/steering.html | |
| Jul 26, 2018 at 4:03 | comment | added | Nilay Ghosh | physics.stackexchange.com/q/24 | |
| Jul 26, 2018 at 2:24 | answer | added | user26872 | timeline score: 14 | |
| Jul 25, 2018 at 23:19 | answer | added | Sklivvz | timeline score: 24 | |
| Jul 25, 2018 at 18:00 | history | tweeted | twitter.com/StackPhysics/status/1022179818283184133 | ||
| Jul 25, 2018 at 17:24 | answer | added | JimmyJames | timeline score: 4 | |
| Jul 25, 2018 at 11:12 | history | protected | Qmechanic♦ | ||
| Jul 25, 2018 at 10:30 | answer | added | Steeven | timeline score: 99 | |
| Jul 25, 2018 at 10:23 | answer | added | user137289 | timeline score: 3 | |
| Jul 25, 2018 at 9:01 | history | edited | Qmechanic♦ |
edited tags
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| Jul 25, 2018 at 9:00 | answer | added | Tausif Hossain | timeline score: 26 | |
| Jul 25, 2018 at 8:53 | answer | added | Rob | timeline score: 1 | |
| Jul 25, 2018 at 8:29 | history | edited | AlphaLife | CC BY-SA 4.0 |
added 69 characters in body
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| Jul 25, 2018 at 8:04 | history | asked | AlphaLife | CC BY-SA 4.0 |