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Old 12-30-2014, 10:44 AM   #61
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Quote:
Originally Posted by brandontx View Post
At 2:25 he momentarily pulled 32 Gs. That's got to be a record.
His name isn't "Max Gs" for nothing.
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Old 12-30-2014, 01:54 PM   #62
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If you look at the lean angle of the center of mass of both bike and rider in relation to the contact patch of the tires on the ground you will be able to instantly calculate g force causing the whole package to turn.

Different riders, different weights, different hanging off, different fore aft weight distribution, etc will all affect handling of a bike to a large degree. A 112 lb Dani Pedrosa vs a big dumb bloke like Blake will return a wide variation in max g's. That is why magazines don't test outright g's. Too many variables.

If you're gonna compare a car to a bike there is one oft overlooked variable. When a car makes a turn all 6 feet of it must squeeze through. On a bike, the center of mass can be squeezed in all the way over the apex, "cutting the grass" as they say. So a car may be forced to take a turn around a 100 foot radius while they bike turns around a 90 foot radius. Think this doesn't matter? Scale it up to contemplate. Try driving your car around a 200 foot diameter circle versus a 400 foot circle. G forces will be the same, right? Of course, cars stick to concrete about the same until you factor in lift. But if you use a mathematical formula ( g force = 1.225 times radius / seconds times seconds) it will take 13 seconds to run around a skid pad with a 100 foot radius at .72g's. If you make the same car, same grip, same g's run around a 200 foot radius skidpad, it will take 18 seconds. A difference of 6 seconds just because the turn is bigger in diameter, all other factors are equal.

That is just a fancy way of saying a bike can run a tighter line through any set of curves than a car can. By doing so it shortens the distance traveled. So even with inferior grip and equal acceleration and braking, a bike might just keep up with a car with considerably more grip.
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Old 12-30-2014, 01:57 PM   #63
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Get race tires and up your g's by 30%....
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Old 12-30-2014, 04:10 PM   #64
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You need to keep up... apparently traction doesn't have anything to do with cornering g's on the Internet.
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Old 12-30-2014, 04:27 PM   #65
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This explains why your Porsche couldn't hang with the GTR... :p
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Old 12-30-2014, 04:46 PM   #66
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I know this is irrelevant to this conversation, but if you really want to "feel" side load aka. lateral g force you should plop your into a nice go kart. There are no street cars and very few race cars that can produce the side load of a kart.
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Old 12-30-2014, 06:20 PM   #67
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Quote:
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You need to keep up... apparently traction doesn't have anything to do with cornering g's on the Internet.
Lol. Ima go armorall my tires.
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Old 12-31-2014, 02:09 AM   #68
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This explains why your Porsche couldn't hang with the GTR... :p
Well that and giving up what, 200 hp? I need to bring a better weapon.
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Old 12-31-2014, 02:52 AM   #69
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Too many variables to determine. Tires, bike, track, track temperature, rider & skills...
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Old 12-31-2014, 06:09 AM   #70
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Quote:
Originally Posted by Eric6R View Post
I know this is irrelevant to this conversation, but if you really want to "feel" side load aka. lateral g force you should plop your into a nice go kart. There are no street cars and very few race cars that can produce the side load of a kart.
Try taking a ride in a F-16. You can lose consciousness.
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Old 12-31-2014, 10:49 AM   #71
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Quote:
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Try taking a ride in a F-16. You can lose consciousness.
And the g's you feel in the seat are just a function of the bank angle of the wings.
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Old 12-31-2014, 11:01 AM   #72
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Quote:
Originally Posted by kenup283 View Post
And the g's you feel in the seat are just a function of the bank angle of the wings.
Don't forget about the stabilators
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Old 12-31-2014, 12:05 PM   #73
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Quote:
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Too many variables to determine. Tires, bike, track, track temperature, rider & skills...
Too many variables to determine what? The bike is supposed to be the variable, it's very easy to get several bikes on the same tire. They would all be at the same place so track and track temp would be the same. You could use the same rider, which hopefully his skills don't vary by the minute so that would stay the same. Now at the end of the day you can say which bike pulled the most lateral g's that day. Will that data really mean anything in the real world? Maybe, but I bet people would like it magazines. More fuel for the magazine races.
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Old 12-31-2014, 02:48 PM   #74
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The benefit of doing the test would be to show people that cars run out of grip before bikes do.

You can see this from the very first posts here, people are too quick to say cars have four tires and they are wider therefore cars are going to pull more lateral g's. Sounds good expect for being completely wrong.
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Old 12-31-2014, 03:11 PM   #75
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Quote:
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The benefit of doing the test would be to show people that cars run out of grip before bikes do.

You can see this from the very first posts here, people are too quick to say cars have four tires and they are wider therefore cars are going to pull more lateral g's. Sounds good expect for being completely wrong.
Please tell me the avg braking distance for a car, what about motorcycle? What about the numerous test showing the car winning in the corners and bikes only being able to keep up because of the vastly better power to weight ratio.
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Old 12-31-2014, 03:24 PM   #76
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Quote:
Originally Posted by kenup283 View Post
The benefit of doing the test would be to show people that cars run out of grip before bikes do.

You can see this from the very first posts here, people are too quick to say cars have four tires and they are wider therefore cars are going to pull more lateral g's. Sounds good expect for being completely wrong.
Uh huh. Compare like for like. F1 against MotoGP.

Completely wrong, as is the vast majority of the Internet knowledge you are producing.
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Old 12-31-2014, 03:25 PM   #77
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Quote:
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Too many variables to determine what? The bike is supposed to be the variable, it's very easy to get several bikes on the same tire. They would all be at the same place so track and track temp would be the same. You could use the same rider, which hopefully his skills don't vary by the minute so that would stay the same. Now at the end of the day you can say which bike pulled the most lateral g's that day. Will that data really mean anything in the real world? Maybe, but I bet people would like it magazines. More fuel for the magazine races.
I found this online. http://www.sportrider.com/tech/g-for...hains-ask-geek
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Old 01-01-2015, 01:41 AM   #78
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Uh huh. Compare like for like. F1 against MotoGP.

Completely wrong, as is the vast majority of the Internet knowledge you are producing.

He made me chuckle when I read his post too.
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Old 01-01-2015, 01:39 PM   #79
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As much I realize I'm setting myself up here, I'd like for you guys to think about something. This thread is a great example of what I see going wrong with MH.

So much sarcasm and so many derisive comments, instead of trying to see where the other guy is coming from and trying to clarify.
Most of what has been said in this thread has been correct or at least not too far off. There's just been a lot of disconnects in viewpoints.

It appears to me that there are certain players on this forum that are acting like a poison. Constant picking and harsh criticizing, lots of sarcasm and pointless needling. These things make people reluctant to express themselves for fear that any little thing that isn't perfectly clear, spelled right, with proper punctuation and links to scientific proofs will be ridiculed.

This whole forum is supposed to be about exchanging ideas, learning from each other and generally sharing the motorcycle experience, with maybe, a little entertainment thrown in.
Some of the smartest, most well educated, experienced people on here are also some of the worst at acting like towards anybody that is mistaken, misspeaks or is misinformed.

Stop it.
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Old 01-01-2015, 01:45 PM   #80
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Quote:
Originally Posted by kenup283 View Post
The benefit of doing the test would be to show people that cars run out of grip before bikes do.

You can see this from the very first posts here, people are too quick to say cars have four tires and they are wider therefore cars are going to pull more lateral g's. Sounds good expect for being completely wrong.
Wrong. Cars outhandle bikes. How else can a stock mazda miata beat a 600 at msrh?
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