ADVrider

Go Back   ADVrider > Riding > The perfect line and other riding myths
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-31-2013, 12:58 PM   #136
eatpasta
Lawnmower Target
 
eatpasta's Avatar
 
Joined: Jul 2006
Location: Santa Barbara, Ca
Oddometer: 9,699
Quote:
Originally Posted by Goss View Post
Will surprise many on cornering ability of bikes now. There was a 1.58g recorded in a turn on the 1198S during the track time.


and for that money, they should have put a Demsosidici up against the 458
__________________
We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.
T. S. Eliot
Quote:
Originally Posted by Burnszilla
I was SO high, I could have hunted duck with a rake
Quote:
Originally Posted by VxZeroKnots View Post
MX stuff isn't my cup of tea, but falling down the side of a mountain is
eatpasta is offline   Reply With Quote
Old 05-31-2013, 01:49 PM   #137
Calimari
Studly Adventurer
 
Calimari's Avatar
 
Joined: May 2009
Location: San Mateo County, CA
Oddometer: 522
Quote:
Originally Posted by Goss View Post
On the subject they need to make an example of this dirt bag.

On the other subject of what modern day sportbikes are capable of read this article. Will surprise many on cornering ability of bikes now. There was a 1.58g recorded in a turn on the 1198S during the track time.

http://www.motortrend.com/roadtests/...s/viewall.html
In a 20° banked curve, so not at all comparable to the lateral g figure from a skid pad.
Calimari is offline   Reply With Quote
Old 05-31-2013, 02:03 PM   #138
marty_uiuc
moran
 
marty_uiuc's Avatar
 
Joined: Oct 2008
Location: people's republic of, CA
Oddometer: 242
I ride the on that bridge almost every day. Scary story!

Sent from my DROID RAZR HD using Tapatalk 2
__________________
the D in your DEMOT
marty_uiuc is offline   Reply With Quote
Old 05-31-2013, 02:17 PM   #139
ttpete
Rectum Non Bustibus
 
Joined: May 2009
Location: Dearborn, MI
Oddometer: 5,169
Quote:
Originally Posted by Calimari View Post
In a 20° banked curve, so not at all comparable to the lateral g figure from a skid pad.
There are no lateral gs to the rider with a motorcycle because it banks itself by leaning into a turn. All forces to the rider are straight down to the contact patch. The tires see lateral force, though, unless you're at the neutral speed for a particular banking. Then, it's just like riding on the level with the exception that everything weighs more.
__________________
10 Ducati 1098 Streetfighter S - "Sleipnir"
09 Kaw Versys
67 Triumph Bonneville TT Special
"The problem with Socialism is that you eventually run out of other people's money" _____ Margaret Thatcher
ttpete is offline   Reply With Quote
Old 05-31-2013, 03:03 PM   #140
Calimari
Studly Adventurer
 
Calimari's Avatar
 
Joined: May 2009
Location: San Mateo County, CA
Oddometer: 522
Quote:
Originally Posted by ttpete View Post
There are no lateral gs to the rider with a motorcycle because it banks itself by leaning into a turn. All forces to the rider are straight down to the contact patch. The tires see lateral force, though, unless you're at the neutral speed for a particular banking. Then, it's just like riding on the level with the exception that everything weighs more.
Moving objects, motorcycle riders included, cannot diverge from a linear path without lateral g's. It takes force and acceleration to move in anything other than a straight line.

My point was that throwing out a lofty lateral g figure without mentioning that it's in a highly banked curve is misleading, sort of like quoting an awesome 0-60 mph figure, but not mentioning that it only applies on steep downgrades.
Calimari is offline   Reply With Quote
Old 05-31-2013, 03:24 PM   #141
ttpete
Rectum Non Bustibus
 
Joined: May 2009
Location: Dearborn, MI
Oddometer: 5,169
Quote:
Originally Posted by Calimari View Post
Moving objects, motorcycle riders included, cannot diverge from a linear path without lateral g's. It takes force and acceleration to move in anything other than a straight line.

My point was that throwing out a lofty lateral g figure without mentioning that it's in a highly banked curve is misleading, sort of like quoting an awesome 0-60 mph figure, but not mentioning that it only applies on steep downgrades.
Correct. The difference is that on the flat, the car driver feels the lateral by being pulled sideways, while the bike rider feels it through the seat of his pants. On the banking, car and bike both feel the force through their backside at neutral speed.

I've driven on the high speed oval at the Ford proving grounds, and if you're at the neutral speed for the lane you're in, you can run hands off all the way around.
__________________
10 Ducati 1098 Streetfighter S - "Sleipnir"
09 Kaw Versys
67 Triumph Bonneville TT Special
"The problem with Socialism is that you eventually run out of other people's money" _____ Margaret Thatcher
ttpete is offline   Reply With Quote
Old 06-01-2013, 01:40 PM   #142
Veteran Noob
Gnarly Adventurer
 
Joined: Jul 2012
Oddometer: 277
Quote:
Originally Posted by Calimari View Post
In a 20° banked curve, so not at all comparable to the lateral g figure from a skid pad.
I'm curious how they arrived at that figure. I can't, with absolute certainty say there aren't any, but I'm not aware of an board data acquisition system that can measure lateral acceleration on a motorcycle (I would love to know if anybody out there is aware of one). Motorcycle lean causes lateral loads to register at or near zero. The only way I know to determine lateral a (on a motorcycle) is to calculate based on velocity and turn radius. I know that GPS based systems are used to do just that but people that I know that have used have told me that this is highly dependent on GPS accuracy, instantaneous lateral a is problematic and typically not very reliable, multiple runs are required to confirm results.
__________________
If you're not part of the solution, you're part of the precipitate.
Veteran Noob is offline   Reply With Quote
Old 06-02-2013, 12:05 AM   #143
shaddix
Banned
 
Joined: Mar 2012
Location: Central AL
Oddometer: 647
Dave moss videos on YouTube have something that measures the lateral acceleration. Why would it be so hard really? I mean you could just take a string and hang a weight from it and measure the angle the string makes as you go around a corner..
shaddix is offline   Reply With Quote
Old 06-27-2013, 08:14 PM   #144
firebug24k OP
Gnarly Adventurer
 
Joined: Jun 2010
Location: San Diego, CA
Oddometer: 124
To bring this back on topic:

http://www.10news.com/news/hearing-h...-bridge-062713
firebug24k is offline   Reply With Quote
Old 06-27-2013, 08:57 PM   #145
PalePhase
Humour Noir
 
PalePhase's Avatar
 
Joined: Dec 2008
Location: That's neither here nor there
Oddometer: 817
Quote:
Originally Posted by Bill Harris View Post
Dang.



Doh.

In my younger days I was a bit more assertive/aggressive, but no more. Against a car, a motorbike brings nothing to the picnic.

--Bill
Yep. That's what my best friend reminded me when I first started riding: Don't let your ego ride pillion.
__________________
“Fools learn from experience. I prefer to learn from the experience of others.”― Otto von Bismarck

1995 Honda VF750CD
2002 Honda VFR800
PalePhase is offline   Reply With Quote
Old 06-28-2013, 03:25 AM   #146
Navy Chief
Beastly Adventurer
 
Navy Chief's Avatar
 
Joined: Oct 2009
Location: Waynesboro, PA
Oddometer: 1,111
Quote:
Originally Posted by firebug24k View Post
Thanks for the update on this. In the picture with the article he looks like a kid who is angry that he got caught.. Seems to have no remorse at all..
Navy Chief is online now   Reply With Quote
Old 06-28-2013, 07:13 AM   #147
ObiJohn
Screaming Banshee
 
ObiJohn's Avatar
 
Joined: Jul 2010
Location: Seattle suburbia
Oddometer: 455
Quote:
Originally Posted by Rinty View Post
I watched the video, and to me the guy looks pretty stressed, as the consequences of his driving sink in.
Yep, he has that deer-in-the-headlights stare. His life story, from what a quick Googling portrays, seems to be that of an insecure, overcompensating jerk, whose ego was tied to his car and how it and he were perceived. The biker flipping him off hit him where he lived, and thus his response to the denigration of all he was. My only question is, did he mean to actually hit the bike, or just intimidate the biker? Hard to see this type of person intentionally damaging the outward manifestation of his ego.

He needs to lose his license, and his car, and compensate the victims fully. Let him ride the bus, or a bicycle. If, however, he intended to hit the bike, then lock him up for a long time. I'm sure a psychologist or profiler could give more insight as to whether he was just a reckless asshole or a true sociopath.
__________________
Everything is on its way to somewhere...
ObiJohn is offline   Reply With Quote
Old 06-28-2013, 08:01 AM   #148
MJS
Beastly Adventurer
 
MJS's Avatar
 
Joined: Dec 2005
Location: Ventura, CA
Oddometer: 1,754
Quote:
He needs to lose his license, and his car, and compensate the victims fully. Then lock him up for a long time. I'm sure a psychologist or profiler could give more insight as to whether he was just a reckless asshole or a true sociopath.
Fixed. He made a deliberate swerve at the biker. Doesn't matter if he intended to scare or hit, the result was the same. He needs to face the consequence of his action which was him deliberately swerving at / into the rider. And the consequence needs to be proportional to the action. If he had swerved and ther had been no collision then maybe a reckless driving charge and appropriate fine would be justified. However in this case, the result of his action was much more grave and the charge (and punishment if found guilty) need to reflect that.

Just my $.02
__________________
"You can follow me, but it's gonna hurt"

MJS screwed with this post 06-28-2013 at 08:51 AM Reason: Fixed auto fill
MJS is offline   Reply With Quote
Old 06-28-2013, 08:28 AM   #149
Offcamber
Beastly Adventurer
 
Offcamber's Avatar
 
Joined: Aug 2010
Location: New Hampshire
Oddometer: 1,533
Quote:
Originally Posted by MJS View Post
Fixed. He made a deliberate serve at the biker. Doesn't matter if he intended to scare or hit, the result was the same. He needs to face the consequence of his action which was him deliberately serving at / into the rider. And the consequence needs to be proportional to the action. If he had served and ther had been no collision then maybe a reckless driving charge and appropriate fine would be justified. However in this case, the result of his action was much more grave and the charge (and punishment if found guilty) need to reflect that.

Just my $.02
I think you mean swerved....
__________________
"Beer cans explode with a nice loud pop when they are hit by a Heidenau K60 at 40 miles an hour. Now my bike smells like last call..." Me
Offcamber is offline   Reply With Quote
Old 06-28-2013, 08:31 AM   #150
PalePhase
Humour Noir
 
PalePhase's Avatar
 
Joined: Dec 2008
Location: That's neither here nor there
Oddometer: 817
Quote:
Originally Posted by MJS View Post
Fixed. He made a deliberate serve at the biker. Doesn't matter if he intended to scare or hit, the result was the same. He needs to face the consequence of his action which was him deliberately serving at / into the rider. And the consequence needs to be proportional to the action. If he had served and ther had been no collision then maybe a reckless driving charge and appropriate fine would be justified. However in this case, the result of his action was much more grave and the charge (and punishment if found guilty) need to reflect that.

Just my $.02
Totally agree. Otherwise, his behavior is not going to change. Hell, it might not change until it kills him or somebody else takes care of that. But without the potential for consequences he's not willing to pay, nothing is going to change.

Had a driver on my commute some years ago who used his car like a weapon to threaten other drivers. He would start by tailgating other drivers just inches off their bumpers, and then no matter which lane they were in, the moment the other driver tried to change lanes, he would cut them off in a full-throttle pass. If you didn't back off to let him have his way, he would try to run you off the road. Strange that on an otherwise heavily patrolled road that the cops never seemed to be around for his morning ritual of ten miles of terroristic behavior. What finally seemed to reign him in was when he was pulling that crap with me, and as it happened when he cut me off when I tried to change lanes was that a semi with trailer had just pulled out of a parking lot onto the road and had not yet gotten above a few mph. He was so fixated on trying to force me off the road he did not see the back of the trailer until the last possible moment and just managed to avoid driving up under it, which would likely have decapitated him at the speed he had been going. He cooled his jets for a few days after that and then I changed jobs and was no longer on the same commute route
__________________
“Fools learn from experience. I prefer to learn from the experience of others.”― Otto von Bismarck

1995 Honda VF750CD
2002 Honda VFR800
PalePhase is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 04:34 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014