Faster on grass?
- Thread starter armyk
- 59 comments
- 5,193 views
- 158
- NB, Canada
- JTpwnface
I think it is, I heard that somewhere else actually.
I was watching "The Car Show" (new show on speed channel) and they were interviewing a retired driver, he was telling a story about how he crashed once, and said that when the car went on the grass it actually sped up before hitting the wall.
Grass is slippery, less friction, and with enough momentum in the first place, it can happen.
- 10,456
- United States
- WrecklessAbandon
It's an old myth, mostly said by NASCAR announcers and some drivers.
When someone gives me a break-down on the physics of how a car could possibly speed up while on the brakes on any surface, I'll consider it.
It feels like it speeds up because it stops slowing down at an instant and dramatic rate. It's like going from full braking power to 5% in an instant, which could give the sensation it sped up. However, any car will stop on grass, no matter what speed it hits or how long it takes, there is still resistance on grass.
Yes, slick tires very often gain traction on grass.
- 517
- Midwest
- slow
Crazy...I was guessing it had to do with the LSD and one tire on grass and one on pavement.
One tire spinning (grass) while one has traction (pavement) causes MPH to go up?
I can't imagine how you'd accelerate/go faster on grass. The less friction of grass would allow sliding faster, sure....but accelerating faster on grass then pavement?
I don't get it.
One tire spinning (grass) while one has traction (pavement) causes MPH to go up?
I can't imagine how you'd accelerate/go faster on grass. The less friction of grass would allow sliding faster, sure....but accelerating faster on grass then pavement?
I don't get it.
- 3,530
- London, Ontario
- Starky513
its true, 100% true, I go 6-18mph faster depending on the car!
- 8,725
- 43
You do not accelerate more quickly on grass.
Given top speed is determined in a large part by friction from tyre grip and downforce, your top speed will probably be less. Your tyres have a larger amount of spin wasted due to the lack of traction.
Grass wheel spin does not generate the same heat levels, resulting in reduced tyre temperature and difficulty reaching an operating temperature.
If using an Eddy current speedometer, your gauges do not measure actual speed.
The speedo is actually measuring wheel rotation regardless of traction or spin.
That is the reason speedos go off when wheel size is altered a lot.
As for driving on grass, try shifting up. Less torque will eliminate the tendency to over-rotate the tyres and gets you back on the track more quickly.
Given top speed is determined in a large part by friction from tyre grip and downforce, your top speed will probably be less. Your tyres have a larger amount of spin wasted due to the lack of traction.
Grass wheel spin does not generate the same heat levels, resulting in reduced tyre temperature and difficulty reaching an operating temperature.
If using an Eddy current speedometer, your gauges do not measure actual speed.
The speedo is actually measuring wheel rotation regardless of traction or spin.
That is the reason speedos go off when wheel size is altered a lot.
As for driving on grass, try shifting up. Less torque will eliminate the tendency to over-rotate the tyres and gets you back on the track more quickly.
- 10,456
- United States
- WrecklessAbandon
- 10,403
- GTP_Spag69
- spagetti69
I'm normally slower and quite peckish tbh.
- 43
None of that applies to GT5, if you ever played the game and spun the wheels off the line, you'd already know this.
Tyre traction affects in-game top speed.
Tyre temperature is also simulated in-game and affects grip levels. Terrain effects burn-out temperatures which screws with resulting grip.
I admit the in-game speedos do not operate the same as real-life since spinning on grass in low gear barely registers on the gauge.
- 7,669
- Exorcet
- OE Exorcet
Grass in GT5 is just a low friction surface with some bumps. The bumps seem to add impulse that is purely vertical, so they don't slow the car down. Because of the low friction, the car speeds up. At leas this is my experience.
It's probably not a realistic effect. A real car would lose speed from impacts with the uneven surface, the tires digging into the ground (if soft enough), and scraping of the bottom of the car with the ground.
It's probably not a realistic effect. A real car would lose speed from impacts with the uneven surface, the tires digging into the ground (if soft enough), and scraping of the bottom of the car with the ground.
noisiaturismo
(Banned)
- 2,093
- Netherland
- help me im banned
Thats why SSR7 is a real top speed track, and why Le Mans and the the backstraight of the 'Ring aren't. Le Mans is very bumpy, and 'Ring is down and then up hill.
- 1,959
- Denmark
- Fyshokid
I remember noticing this a few months ago. I was grinding some Indy race with the X2010, and when I drove on the grass on the back straight (did it by mistake the first time), I reached a higher speed by the end of the straight than when driving on the tarmac. It was very impractical though.
- 12,018
- Indianapolis
- BrandonW77
