Anyone for physics? (article on banking...)
05-14-12, 10:25 AM
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Anyone for physics? (article on banking...)
05-14-12, 10:58 AM
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This means that a cyclist can only go at about 45.5 km/h around a [flat] corner without losing grip
05-14-12, 01:08 PM
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That calculation only works when:
The radius of a turn on a Olympic velodrome is around 20 meters,
Now Short Track Ice Speedskaters with lots more traction on flat ice can corner way faster!
The radius of a turn on a Olympic velodrome is around 20 meters,
Now Short Track Ice Speedskaters with lots more traction on flat ice can corner way faster!
05-14-12, 04:33 PM
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The article leaves out a lot of interesting physics about why the turns generally aren't semicircles, as well as some interesting angular momentum effects.
05-16-12, 10:43 AM
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05-16-12, 11:21 AM
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Another thing that's fun is conservation of angular momentum-- it helps in the paceline transitions in the corners (in addition to the elevation change effects).
06-11-12, 07:32 PM
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But you are going to strike a pedal way before 45 kph.
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Il faut de l'audace, encore de l'audace, toujours de l'audace
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
07-04-12, 09:19 AM
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It is a good start to the basics. The coefficient of friction is a variable on a bicycle. The author's first equation assumes that turning a bicycle is flat. Turning a bicycle on flat ground requires a lean which changes force vectors and friction. He/She doesn't come back to this until the end of the article where a correction is added.
I think there should have been material on the basics of superelevation.
I think there should have been material on the basics of superelevation.
07-04-12, 09:28 AM
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If you go from the straightaway into a constant radius turn you go instantly from no centripetal acceleration to V^2/R, and it would be instant changes from no "compression" to max compression and then suddenly back. Instead they're a cycloid (or close to it) so the centripetal acceleration comes on slow, hits a max at the middle of the turn, and decreases slowly as you exit.
Another thing that's fun is conservation of angular momentum-- it helps in the paceline transitions in the corners (in addition to the elevation change effects).
Another thing that's fun is conservation of angular momentum-- it helps in the paceline transitions in the corners (in addition to the elevation change effects).
07-04-12, 11:45 AM
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Lapped 3x
07-04-12, 07:06 PM
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I'm a simplistic kind of guy. The kind who rides bikes in a circle. Fast.
Somebody want to explain to us ordinary mortals what's going on?
Somebody want to explain to us ordinary mortals what's going on?
07-05-12, 04:44 PM
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To turn fast, you must lean. To go (X) amount of speed, you must lean (C) amount of degrees. (C) amount of degrees is already farther than a bike can lean (A). So to get to the (C) degree angle needed, the track must me leaned as well (B). Therefore (A)+(B) = (C) and we can turn while going (X) amount of speed.
