PDA

View Full Version : More grip smooth side or rough side?


Cherub1m
2009.05.22, 10:11 AM
Hi RCP Staff or anyone who has a good explanation.

I tried a little experiment. I took an RCP tile and angled it to the point if I placed a car side ways on it, the car would slide down. I noticed I could use a steeper angle with the smooth side, on the rough side the car would consistently slide down at a lesser angle. I know most think (and I am one of them) that the rough side has more grip, but how do you explain the smooth side ability to reach a steeper angle before the car slides down?

Davey G
2009.05.22, 10:18 AM
Sup Philip, a Poll was done regarding the smooth side and rough side not too long ago. Check it out.

http://www.minizracer.com/forums/showthread.php?t=31300&highlight=side+RCP

RCPMini-z
2009.05.22, 10:34 AM
There are a few factors that through our tests, allow the rough side to yield more grip than the smooth side. Others may have some similar evaluations or can provide you with additional advice on why one side provides more grip the other.

The first is that dust settles on the smooth side of the track, making this side less grippy the more runs or laps you put on the track. The rough side is porous and allows the dust to settle in the pores of the surface, yielding a much more consistent grip throughout your runs and the days laps.

Second, when the car is traveling through the turns, there is added weight put on the outside tires, depending on which way you are turning. This down-force causes the soft rubber tires (tires with low number deg ratings) to dig into the porous or rough side of the track, thus yielding grip. The smooth side doesn't give you the same affect unless you run foams on your car, which can add grip when the down force is applied. If you run foams and use the smooth side, you will be fighting the dust build up, causing less grip unless you constantly wipe down the smooth side after multiple laps.

Third, the grooming pattern that the manufacturing machines produce on the rough side also allows the soft rubber tires to grab the fibers of the surface. This situation is more prevalent when the car is moving, rather than stationary such as the test you performed by simply raising the tiles and seeing which car slides easier.

I hope that helps.

Cherub1m
2009.05.22, 10:55 AM
Sup Philip, a Poll was done regarding the smooth side and rough side not too long ago. Check it out.

http://www.minizracer.com/forums/showthread.php?t=31300&highlight=side+RCP

There are a few factors that through our tests, allow the rough side to yield more grip than the smooth side. Others may have some similar evaluations or can provide you with additional advice on why one side provides more grip the other.

The first is that dust settles on the smooth side of the track, making this side less grippy the more runs or laps you put on the track. The rough side is porous and allows the dust to settle in the pores of the surface, yielding a much more consistent grip throughout your runs and the days laps.

Second, when the car is traveling through the turns, there is added weight put on the outside tires, depending on which way you are turning. This down-force causes the soft rubber tires (tires with low number deg ratings) to dig into the porous or rough side of the track, thus yielding grip. The smooth side doesn't give you the same affect unless you run foams on your car, which can add grip when the down force is applied. If you run foams and use the smooth side, you will be fighting the dust build up, causing less grip unless you constantly wipe down the smooth side after multiple laps.

Third, the grooming pattern that the manufacturing machines produce on the rough side also allows the soft rubber tires to grab the fibers of the surface. This situation is more prevalent when the car is moving, rather than stationary such as the test you performed by simply raising the tiles and seeing which car slides easier.

I hope that helps.

Thanks for the link Dave

Thanks for the explanation RCP staff

dxm2
2009.11.25, 01:54 PM
Which side is used more in competitions?

RCPMini-z
2009.11.25, 02:09 PM
The porous or rough side is used in most competitions. It yields a more consistent surface throughout the days racing. Dust settles beneath the pours rather than on the surface, which gives you an overall better racing surface without the need to clean the track often, such as with a smooth surface.

dxm2
2009.11.25, 03:01 PM
Thanks for the quick response! Most of our club members liked the rough side better, but about 1/3 favored the smooth side.