Clear Bra vs. No Bra

[Tristor]

Originally Posted by DaBoBo21

I avoid tailgating and driving close to other cars. I also try to stay on the access roads as much as possible around SATX. I get the occasional tiny chip on my BRZ. Though, my wife's FR-S front bumper is lookin' rougggghhhh (don't get in her way lol ).

Heh, it’s mostly from country highways, not tailgating on the Interstate. Some of them are self-rockings. Especially the big boo-boo on the rear bumper cover which I got driving Twisted Sisters with nary another soul around.

[pcguru2000]

Originally Posted by Tcoat

All of this at between 80 and 100 KPH plus whatever the velocity of the material was when it hit me. My bumper has lost all gloss and looks like it has some kind of car leprosy.

I want to see the lerprosy

[Tcoat]

Originally Posted by pcguru2000

I want to see the lerprosy

It doesn't come through well in pics. It has to be seen in 3D to be appreciated. I will try though.

[nikitopo]

Originally Posted by DaBoBo21

I avoid tailgating and driving close to other cars.

That ^

[Tcoat]

Originally Posted by nikitopo

That ^

Traveling at 130 kph on a four lane highway (one direction) means that any debris or rocks kicked up at you are traveling well in excess of 200 kph. You can be as far back as traffic permits and still have no place to go even if you see it coming. You do not have to be tailgating or even close to get nailed. I got hit by a tail light assembly that came off a car that was two in front of me. It flew off, hit the highway bounced over the car in front of me and came down square on the top of my bumper.. I saw it coming and due to traffic there was fuck all I could do about it. There is no special driving skill that can protect you from such situations no matter how smug or sure of your superior driving skills you may be.

[new2subaru]

Originally Posted by Tcoat

Traveling at 130 kph on a four lane highway (one direction) means that any debris or rocks kicked up at you are traveling well in excess of 200 kph. You can be as far back as traffic permits and still have no place to go even if you see it coming. You do not have to be tailgating or even close to get nailed. I got hit by a tail light assembly that came off a car that was two in front of me. It flew off, hit the highway bounced over the car in front of me and came down square on the top of my bumper.. I saw it coming and due to traffic there was fuck all I could do about it. There is no special driving skill that can protect you from such situations no matter how smug or sure of your superior driving skills you may be.

I know you know this, but posting for others. It's far better to take the hit than to swerve.

[Stang70Fastback]

Originally Posted by nikitopo

That ^

Cool. That doesn't prevent rock chips.

[rcm47]

So opticoat the entire car then clear bra the full front end for maximum protection?

[Tcoat]

Originally Posted by rcm47

So opticoat the entire car then clear bra the full front end for maximum protection?

[Spuds]

Originally Posted by Tcoat

Traveling at 130 kph on a four lane highway (one direction) means that any debris or rocks kicked up at you are traveling well in excess of 200 kph.

Because I like you, I'll give you a chance to catch your physics mistake in this one.

[Tcoat]

Originally Posted by Spuds

Because I like you, I'll give you a chance to catch your physics mistake in this one.

I am traveling 130. The focks coming at me are doing at least 80. That gives a combined speed of over 200. Don't see any mistakes

[Stang70Fastback]

Originally Posted by Tcoat

I am traveling 130. The focks coming at me are doing at least 80. That gives a combined speed of over 200. Don't see any mistakes

So rocks kicked up by vehicles traveling the same direction as you suddenly are traveling backwards at 80 kph?

Quick reminder, when your tire touches the ground while driving, the tread making contact with the pavement (and flinging rocks) has ZERO velocity for that instant. As the contact patch lifts up, it begins traveling with a forward velocity. It does not fling rocks backward. It flings rocks FORWARD and up. They only seem like they are coming at you because they are decelerating as you run into them.

The only time rocks are flung backward would be in a rallying type scenario, or some other situation with wheelspin where the tread is actually moving backwards as it contacts the ground.

Spuds wins this one :P

[Tcoat]

Originally Posted by Stang70Fastback

So rocks kicked up by vehicles traveling the same direction as you suddenly are traveling backwards at 80 kph?

Quick reminder, when your tire touches the ground while driving, the tread making contact with the pavement (and flinging rocks) has ZERO velocity for that instant. As the contact patch lifts up, it begins traveling with a forward velocity. It does not fling rocks backward. It flings rocks FORWARD and up. They only seem like they are coming at you because they are decelerating as you run into them.

The only time rocks are flung backward would be in a rallying type scenario, or some other situation with wheelspin where the tread is actually moving backwards as it contacts the ground.

Spuds wins this one :P

Well rocks get thrown at me at high velocity every day so I guess I just have to tell them it is impossible. They are flung from threads and can release at any point not jut up and over.

[Spuds]

Originally Posted by Tcoat

Well rocks get thrown at me at high velocity every day so I guess I just have to tell them it is impossible. They are flung from threads and can release at any point not jut up and over.

No, that's just the rocks people are throwing at you because PHYSICS!!!! Also, this is definitely a thread where rocks are coming at you.

The bottom of the wheel is stationary, the top of the wheel is moving in the same direction as the car but at twice the speed. The center of the wheel is moving at the same speed as the car body in the same direction. What part of the car accelerates anything rearwards?

It seems fast, but that's the same speed (or less) something like a deer would come at you if it suddenly appeared in front of you.