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Do the 2-wheel skills go along when you use a metal motor?
No. Well, that's pretty definate but I say yes. Many decades of both convonce me that things like reading the road and positioning transfer. I'm a better motorcyclist for being a bicyclist. Phil Brown |
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#43
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#44
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It's worth mentioning that the best book on cornering on a bicycle _A
Gear Higher_ was written by someone who wrote a classic text on motorcycling (_A Twist of the Wrist_ I think is the title). JT **************************** Remove "remove" to reply Visit http://www.jt10000.com **************************** |
#45
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It's worth mentioning that the best book on cornering on a bicycle _A
Gear Higher_ was written by someone who wrote a classic text on motorcycling (_A Twist of the Wrist_ I think is the title). JT **************************** Remove "remove" to reply Visit http://www.jt10000.com **************************** |
#46
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On Mon, 30 Aug 2004 23:51:18 -0700, Benjamin Lewis
wrote: wrote: wrote: That just means that "hard cornering" occurs at a smaller turning radius, so this is only true if you're talking about bicycles and motorcycles riding on the same or similar course (and perhaps you are; I'm just jumping in at random ) Apart from one-way downhills, are there any bicycle races in which cornering is the deciding factor? That is, races in which riders who are roughly as fast on the straights are helpless to keep up because they corner too slowly? Ya got me; I probably know less about bicycle racing than you do. From other posts here I gather that this is not generally a major concern. For me, I can only think of two or three turns that I ride regularly which require me to use any "cornering skills". I generally slow down way more than is necessary... I don't think I'm even close to limits of traction, but I don't really want to find out the hard way (is there an easy way?) Dear Benjamin, Almost everyone slows down more than is necessary when cornering. As far as I know, there's only one way to find out if you're at the limit of cornering traction--a wheel abruptly slips out from under you. Riders most often crash in corners not by losing traction and falling down into the inside of the turn in this fashion, but by overshooting the turn and faithfully following a too-wide line to their doom. It's awfully hard to tighten up a turn after you've committed yourself to a line and speed. A common feeling is a helpless I-can't-turn-that-sharply behind someone who is doing exactly that because he started out intending to make a sharper turn. Just as bad as over-shooting the curve is the panic-driven braking and jerking toward the inside of the curve that leads to a high-side crash--plenty of traction, enough to flip the bike and rider to the outside of the curve. It's rare to see someone simply dive into a turn so fast on a bicycle that the wheels just slip out from under him as if he'd hit a patch of ice. In any case, most bicycle crashes have little to do with deliberate cornering. The riders crash because they run into each other, are trying to avoid running into each other, or face an unexpected hazard--a dog, a car, a spectator, a patch of loose straw hay in the turn, a nasty crack in the pavement, and so on. In general, bicycle riders are actually well below the limits of traction in corners--otherwise, they'd be falling down toward the inside. Some of this is due to ignorance, but most of it is due to quite sensible fear. Cornering until you lose traction on a normal course means crashing, which a) slows you down and b) may kill you. Cars, of course, are different, since they just slide on four tires without falling. Car testers simply accelerate around a skid pad and note the speed at which the skid starts. Anyone unsure about this sort of thing can test the limits of traction on a large, deserted parking lot by repeatedly approaching a sharp curve laid out with chalk marks at higher and higher speeds. The vast majority of riders will never have the nerve to turn hard enough to lose traction and fall to the inside of the turn--they'll just overshoot the chalk marks harmlessly. Those who don't will suffer considerable road rash, or worse. Carl Fogel |
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On Mon, 30 Aug 2004 23:51:18 -0700, Benjamin Lewis
wrote: wrote: wrote: That just means that "hard cornering" occurs at a smaller turning radius, so this is only true if you're talking about bicycles and motorcycles riding on the same or similar course (and perhaps you are; I'm just jumping in at random ) Apart from one-way downhills, are there any bicycle races in which cornering is the deciding factor? That is, races in which riders who are roughly as fast on the straights are helpless to keep up because they corner too slowly? Ya got me; I probably know less about bicycle racing than you do. From other posts here I gather that this is not generally a major concern. For me, I can only think of two or three turns that I ride regularly which require me to use any "cornering skills". I generally slow down way more than is necessary... I don't think I'm even close to limits of traction, but I don't really want to find out the hard way (is there an easy way?) Dear Benjamin, Almost everyone slows down more than is necessary when cornering. As far as I know, there's only one way to find out if you're at the limit of cornering traction--a wheel abruptly slips out from under you. Riders most often crash in corners not by losing traction and falling down into the inside of the turn in this fashion, but by overshooting the turn and faithfully following a too-wide line to their doom. It's awfully hard to tighten up a turn after you've committed yourself to a line and speed. A common feeling is a helpless I-can't-turn-that-sharply behind someone who is doing exactly that because he started out intending to make a sharper turn. Just as bad as over-shooting the curve is the panic-driven braking and jerking toward the inside of the curve that leads to a high-side crash--plenty of traction, enough to flip the bike and rider to the outside of the curve. It's rare to see someone simply dive into a turn so fast on a bicycle that the wheels just slip out from under him as if he'd hit a patch of ice. In any case, most bicycle crashes have little to do with deliberate cornering. The riders crash because they run into each other, are trying to avoid running into each other, or face an unexpected hazard--a dog, a car, a spectator, a patch of loose straw hay in the turn, a nasty crack in the pavement, and so on. In general, bicycle riders are actually well below the limits of traction in corners--otherwise, they'd be falling down toward the inside. Some of this is due to ignorance, but most of it is due to quite sensible fear. Cornering until you lose traction on a normal course means crashing, which a) slows you down and b) may kill you. Cars, of course, are different, since they just slide on four tires without falling. Car testers simply accelerate around a skid pad and note the speed at which the skid starts. Anyone unsure about this sort of thing can test the limits of traction on a large, deserted parking lot by repeatedly approaching a sharp curve laid out with chalk marks at higher and higher speeds. The vast majority of riders will never have the nerve to turn hard enough to lose traction and fall to the inside of the turn--they'll just overshoot the chalk marks harmlessly. Those who don't will suffer considerable road rash, or worse. Carl Fogel |
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On Tue, 31 Aug 2004 11:03:37 GMT, "Callistus Valerius"
wrote: But most bicycling does not involve the kind of braking and cornering that's routine on motorcycles because most bicycling takes place at only 10 to 20 mph. Armstrong averages all of 25 mph for the whole Tour. Are you riding your kids BMX bike on the little hill behind your house? When I'm descending 8% grades, I sometimes pass motorcyclists at 55 mph. Bicycling, like what we are talking in this newsgroup (not kids BMX bikes) takes much more talent. For one, your center of gravity is so much higher than on a motorcycle. Dear Cal, When I plug in 0 watts for coasting and -0.08 for an 8% grade, it appears that you and your bicycle need to weigh around 273 pounds to reach 55 mph (24.6 meters per second): http://www.analyticcycling.com/ForcesSpeed_Page.html Even if you and your bike really are reaching 55 mph on 8% grades, I suspect that the motorcycles could out-corner you if they were interested. And if you're braking, you're no longer doing 55 mph. The Fury RoadMaster easily reached 35 mph on the s-bend down the arroyo about a minute from my house. The last curve is exciting, but only because it's blind and someone may be coming up on the wrong side of the road or a deer may be standing in the way. I can't quite believe that typical bicyclists on this group are exercising tremendous talent in cornering most of the time, but I'm open to correction. Cheers, Carl Fogel |
#49
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On Tue, 31 Aug 2004 11:03:37 GMT, "Callistus Valerius"
wrote: But most bicycling does not involve the kind of braking and cornering that's routine on motorcycles because most bicycling takes place at only 10 to 20 mph. Armstrong averages all of 25 mph for the whole Tour. Are you riding your kids BMX bike on the little hill behind your house? When I'm descending 8% grades, I sometimes pass motorcyclists at 55 mph. Bicycling, like what we are talking in this newsgroup (not kids BMX bikes) takes much more talent. For one, your center of gravity is so much higher than on a motorcycle. Dear Cal, When I plug in 0 watts for coasting and -0.08 for an 8% grade, it appears that you and your bicycle need to weigh around 273 pounds to reach 55 mph (24.6 meters per second): http://www.analyticcycling.com/ForcesSpeed_Page.html Even if you and your bike really are reaching 55 mph on 8% grades, I suspect that the motorcycles could out-corner you if they were interested. And if you're braking, you're no longer doing 55 mph. The Fury RoadMaster easily reached 35 mph on the s-bend down the arroyo about a minute from my house. The last curve is exciting, but only because it's blind and someone may be coming up on the wrong side of the road or a deer may be standing in the way. I can't quite believe that typical bicyclists on this group are exercising tremendous talent in cornering most of the time, but I'm open to correction. Cheers, Carl Fogel |
#50
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Are you riding your kids BMX bike on the little hill behind your
house? When I'm descending 8% grades, I sometimes pass motorcyclists at 55 mph. Bicycling, like what we are talking in this newsgroup (not kids BMX bikes) takes much more talent. For one, your center of gravity is so much higher than on a motorcycle. Dear Cal, When I plug in 0 watts for coasting and -0.08 for an 8% grade, it appears that you and your bicycle need to weigh around 273 pounds to reach 55 mph (24.6 meters per second): http://www.analyticcycling.com/ForcesSpeed_Page.html Even if you and your bike really are reaching 55 mph on 8% grades, I suspect that the motorcycles could out-corner you if they were interested. And if you're braking, you're no longer doing 55 mph. I'm talking about a screamer, slight curves. Did you figure wind in your calculation? Of course, a motorcycle is easier, they can use their transmission, and disc brakes to keep everything under control. A road bike has a pair of crummy rim brakes, and by sitting up as a wind brake to control things. I've done both, and it's a mix. The one thing I would totally agree with you, is that the engine of a motorcycle can get you into a lot more trouble than a bicycle engine can, if you ride outside your ability. |
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