LF4472
Seasoned Member
Yep, it is. The same thing happens with my Z06.The ass end gets really dirty......... Must be an aerodynamics thing...
Yep, it is. The same thing happens with my Z06.The ass end gets really dirty......... Must be an aerodynamics thing...
After the initial problems with mine, it's been smooth sailing. Both my wife (it's her daily) & I really enjoy it. If I had 1 nit to pick, it would be with the door handles. They're unsightly! They don't fit in with the overall design of the car. Those of you who got the 5 BWs are lucky as they have nicely designed door handles.
Comments about the 4 BW's door handles? Agree or Disagree?
Other nits to pick or, perhaps larger issues that you don't
Pictures or it didn't happen😉Agree on the door handles being tacky. Additionally, they have a lot of angles on them, as it not rounded. This is key to know for anyone trying to wrap their car. I put a stealth wrap on my infrared tint coat, looks AMAZING, however the wrap doesn't stick to those ugly handles. I went with CF door handle covers as a fix. Looks ok but not 💯
Low pressure on the tail would be drag, not thrust.Facts but that's what happens with spoiler cars vs wing cars. The low pressure zone is developing right against the car which means low drag, 🤩but all that junk stays on the rear bumper 😱
The areo on these cars are amazing. Truly love the way the design cuts vs pushes through air.
Correct recirculation zones are classed as low pressure zones as a opposed to laminar flows. All cars develop a low pressure zone as the air flow rushes to fill the void left by the vehicle that was previously occupied that space.Low pressure on the tail would be drag, not thrust.
Spoilers increase downforce by forcing the streamlines higher over the rear of the car, creating a high pressure region on the deck lid. This also increases drag. The dirt comes from the flow separating at the boat tail creating regions of recirculation behind the car.
Correct recirculation zones are classed as low pressure zones as a opposed to laminar flows. All cars develop a low pressure zone as the air flow rushes to fill the void left by the vehicle that was previously occupied that space.
Spoiler cars tend to have more of this recirculation than wing cars but they also tend to create more down force under more conditions. Wings have a narrower efficient velocity window.
All you have to do is watch a car at speed driving through a light rain to see it looks much more like the bottom illustration. 🙂Recirculation zones are low velocity zones, and thus higher static pressure. You've got the right idea but your flipping Bernoulli on his head
Nothing past the first few inches of hood on a car is laminar flow, the Reynolds number is just too high. (Re# is easily over a million). You can safely approximate all of the boundary layers as turbulent.
The general public thinks sporty car aero look like this:
View attachment 16395
But in reality, its much more turbulent, with separated flow and looks like this:
View attachment 16396
Ok, because I'm not a smart man is all this why the ass end of my 4BW gets real dirty? You guys are talking next level stuff for me...
But in reality ... looks like this:
View attachment 16396
I wish they had kept it orange like the rest of the buttons. Same with the stop/start green. Super nitpicky though lolThe door lock indicator is red when it is locked. "Red" means "problem" or "danger" to me. Doors being locked is not a problem.
I’m also coming from and M and I like the button to open (nice to know 100% that it’s unlocked) but it’s taking some getting used to. One thing I do miss (unless the car has it and I just haven’t figured it out) is being able to swipe the top of the handle to lock the car.May have been mentioned before, but I very much hate the proximity passive entry system. When you approach the car it senses the key fob. You have to press the silver button on the door handle to unlock the car, THEN pull the handle to open the door. If you don't hit the silver button you cannot open the door. Infuriates me, coming from 10+ years of BMW M car where the car senses the key and you simply just pull the door handle to open the door.
I know it's a simple thing but still annoys me, many times I pull the handle and my hand slips off as I didn't hit the silver button first, and I feel stupid doing it.
I’m also coming from and M and I like the button to open (nice to know 100% that it’s unlocked) but it’s taking some getting used to. One thing I do miss (unless the car has it and I just haven’t figured it out) is being able to swipe the top of the handle to lock the car.
I haven't heard Reynolds number since senior year aerodynamics classes.... excuse me while I seek a therapist to help with the night terrors that just brought back.Recirculation zones are low velocity zones, and thus higher static pressure. You've got the right idea but your flipping Bernoulli on his head
Nothing past the first few inches of hood on a car is laminar flow, the Reynolds number is just too high. (Re# is easily over a million). You can safely approximate all of the boundary layers as turbulent.
The general public thinks sporty car aero look like this:
View attachment 16395
But in reality, its much more turbulent, with separated flow and looks like this:
View attachment 16396
Aerodynamics class? Damn, I have night terrors about basis math...... Some of you guys are smart as all get out... I'm need to stop posting because of my ignorance!I haven't heard Reynolds number since senior year aerodynamics classes.... excuse me while I seek a therapist to help with the night terrors that just brought back.