I consider the 80s and 90s as the golden era of pop up headlights. You had so many great cars with them. To name some; Diablo, Countach, 180, AE86 Trueno, MR2, RX-7, F40, Corvette, Porsche 928, to name a few. I know that there are more ferraris, but I can't remember their names.
I enjoyed this episode, thank you! I think pop-up headlights could still work, if a manufacturer really wanted them their engineers would certainly find a way.
@@JMBA7X I've thought about this a lot. My solution would involve the headlight also having a hinge around the front of the light. Then, a solenoid at the rear could be activated by the same sensors that engage bonnet safety systems, and the headlight could fall/be pulled flat backwards into the car when a pedestrian impact is detected. I always thought the rule pop-ups were breaking was the one prohibiting lights that move in any way, though.
One thing I would have loved to hear (and I could have missed it) is the fact that with pop-up headlights, the hoodline itself can be lower than with Integrated lights. While this does offset figures, it still shows similar horizontal and vertical separation as you displayed (just to a lesser extent). Another thing about the Rx7 that made it so good was how LOW the hoodline was in comparison to other vehicles of the time. An ultra-low hoodline and popups results in better aero during the day, which is when you should be racing anyways. :D
Just pull a Takumi and flip them down while driving down a dark mountain pass in Japan to surprise your opponent as you reopen them to see your foe's shocked face lit up up by the light.
Great video. As a point of interest, look at the Corvettes that raced at the 24 hours of LeMans in 1969 to see how they fared in the headlights to reduce drag, weight, and increase reliability.
GraysGarage I'd also like to see a more in-depth look at the C4 Corvettes as they designed the pop-ups with aerodynamics in mind. Instead of just popping up, the whole housing would rotate so it could be more streamlined. Very useful when the ZR-1 set it's endurance record!
Jake Swierczek The backside of the pop-up is always the same, no matter what method is used to "raise" the headlight. There is no difference in the "streamlining". Look at any pop-up headlight and you will see this....
You may find this interesting:. I have a late model c3 Corvette, with the t-tops off and headlights up my hair used to get ruffled. I installed a large spoiler and the ruffled hair effect has been reduced.
great vid, keep them coming! I had suspected the pop up headlights on my MKII MR2 created a great deal of drag, but I did not realize the vortex height may reach as high as the top of the windshield! I installed "Revision 6" low rise headlights a few years back, and expect they are much better since the body panel at the top of the pop up is only ~10 degrees above horizontal, compared with ~45 degrees above horizontal with stock pop ups. Thanks for the vids, I like both the technical content and the historical context!
C5 owner here. Also want to address the headlights especially in a high speed capable car liek a corvette. Can you imagine what those things are doing at 170 mph??? I bet my left nut it has a drastically lower top speed with those airbrakes deployed.
Yes, a car that has it's pop-ups UP suffers a significant drag penalty.....BUT with the pop-ups DOWN the aero is significantly better than with aerodynamic headlights (non pop-ups). Pop-ups also allow the use of much more efficient headlights than the tiny projectors that must be used with modern aero headlights. There ARE advantages in pop-ups.
I just started thinking about electrical cars. Technicaly since pop up lights are bad for fuel efficency& speed. Then what about if they could be used on electrical cars, since electricity itself is cheaper? and electricity powered cars dont drive at high speeds. Basically right now on the market, there are some bubbles, leaf and tesla s. I would like to see also something resembling 90's sports car whit pop ups, but running on something cheaper.
JustaParps the problem here is, electric cars' weakest point is range. You're lucky if your car lasted 100 km on one charge. And because at night you not only increase drag, but also turn on headlights, which guzzle A LOT of energy, your 50 km turn into 25 km, which leaves you somewhere inbetween home and whereever you went to. But day-only electric cars without headlights may be an interesting concept, but not for this discussion.
I think the main point is that, with 'pop up' headlights, the surrounding bodywork is lower which is better for the frontal cross-section during the times the headlights are 'down'. Assuming the headlights are only used on a needs basis, ie darkness, the impact they have on aero is less because they would, hopefully, be travelling slower. I love my MR2 SW20...Mr. G! thank you for a great series
I believe there was one other major change in regulations that caused the demise of the pop-up headlights - sometime right around 1990 the regulations in the USA (and probably elsewhere) changed to allow the use of molded poly-carbonate headlight assemblies with a replaceable bulb. Prior to that, regulations required a sealed beam headlamp so auto manufacturers were stuck using headlights that were either round or rectangular and had a more or less flat front. There's no way to make that look good on the front of a sports car, so they hid them away with pop-up headlights. The regulatory change paved the way for the nice aerodynamically friendly headlights we see on vehicles today.
i love them, all my favorite cars have pop up headlights and never even noticed, i think it's like a fetish, of course i always suspected that Popups were terrible for aerodynamics, but still, they look WAAAAY better in my opinion, i mean: 288 GTO F40 CHARGER '68 R/T RX-7 240sx NSX AE86 who cares about the aero, right ?
Your videos are great, there's so little information elsewhere on the net showing as good a demonstration as yours. I'd love to see comparison videos of different body types like wagon, hatch, sedan, coupe, 4x4, pickup/ute etc.
I have a C5 Z06. Note that the "fixed roof coupe" aka FRC (which is the Z06 design) is different that the standard c5. I am very interested to see these compare. GM claims that the FRC design was done as a weight reduction. I am wondering if the drag penalty is worth the weight savings? Also, I am highly interested in seeing the effects of front/rear splitters, wheel deflectors, and hood vents. Cant wait for more of your videos! P.S. I am a senior in Mechanical Engineering at the University of South Florida
Im pretty sure the drag difference between the FRC and the fastback are pretty minimal. The FRC is still slopped enough to maintain laminar flow. At least thats what my coopium tells me since I am also a z06 c5 owner!.
Another great episode. I would be intrigued to see what airflow along side of the car is though. Considering things like hub cap design, wheel farings, and lowering kits.
To comply with the 'fail safe rule' Honda, at least on the 3rd gen Prelude, allows you to manually turn the motors when they aren't powered. If there is power to them you get a lot of resistance and they won't move much, pull the fuses and you can raise and lower them manually.
The C5 Corvette isn’t the last car to have pop up headlights. The Ares Panther supercar is still in production today and has pop up headlights. It’s like a mix between and old NSX and a new Lamborghini.
Thanks for this great episode, i always wondered the drag coefficiency of my '85 Celica Supra especially when driving at nights. Now that its been clear, i really couldn't imagine the drag on a Cizeta-Moroder V16T which has 4 pop-up headlights!
I expected drag with pop ups, but those figures surprised me. I own MR2, SW20. Pop ups look so cool. Modern headlamps, so often look so ugly, blobby, like Marty Feldman eyes. The other issue with plastic headlamps, is they cloud over, not letting out a great deal of light. Cost of replacements is really high, I expect much higher than the cost of the extra fuel used, I am not a fan of modern cars, I will stick with classics. BTW, love the Corvette C1, it would look at home in an art museum.
Aaaaand now I am really thinking about deleting the pop ups on my C5Z! I always knew how bad these are, but the thumbnail alone says a 1000 words. How can I street race people at night and have fun knowing im deploying a literate air brake the entire run?!?!?!
Another good video. I would say it'd be interesting to quantify in a tangible sense what 5-11% drag increase means. For example, if you take the Corvette C5 example, what measurable effect is there on speed / fuel efficiency / high speed stability / etc. assuming no other factors change? For example, if I drove a measured 300 miles in my C5 with the lights folded down, and then a measured 300 miles with the lights popped up (but negating having the lights emitting light so as to eliminate electronic drain on the engine etc.) what would the predicted difference be, using your proposed figure of ~9%? Just a thought!
Awesome video. I wonder what the difference in drag would be on the FD with pop ups vs aftermarket flush lights. Thanks for the great videos. Keep um coming!
Another thing that would be really interesting in my opinion! If you could take a look at & explain the principles of the 'NACA duct' as seen in various super fast ferrari's bodywork, that would show an interesting side of aerodynamics. I believe they work by pulling air out of the inside of the car i.e. To remove heat from the engine etc. would be keen to see some testing with various forms of duct designed to do this for example. Cheers!
As an extension of this pop up theme can you evaluate the impact of pop up tilt sunroof on the aerodynamics. Like Mercedes w126 300se with tilt sunroof option.
Great video, I recommend playing it at 1.25x speed for those of us with ADHD. By the time he gets to the end of making a setence, I forget the beginning of the sentence... fml...
I recently saw a video of a 180SX crashing due to excessive speed, and at the last moment it popped up the headlights. Now I know why- driver have improvised airbrakes!
180SX and "excessive speed" should not be in the same sentence. :) Also, if excessive speed caused crashing, no missile would be capable of a successful launch.
Pop up headlights look sinful from aerodynamic stand point of view. I did notice that pop up generated vortex helped fill the low pressure zone behind the rear window, but at a huge cost of frontal drag and flow separation.
I guess I'm one of the few people that prefer the normal lights over pop-ups. No matter how cool they are, I'm just too engineering minded to like them.
HAHAHA "made during my spare time, fri nights and weekends" I don't know if that was meant to be a joke but I took it that way... mostly because I'm a lonely nerd watching this on the weekend.
Could you please explain what is the effect of different flow types on the shear drag force and the pressure drag forces acting on the car? How does a recirculation zone affect the forces on the car in these zones? Thanks.
Would it be possible to create popup headlights with a better aerodynamic profile though? The front of those lights is clearly a flat plane and hard edges. But Surely there are more refined shapes possible than that? Or does the mechanical design of the popup mechanism limit what you can do with it?
the older nsx looks alot better because of these lights and i hated acura/honda for changing them but after seeing this i guess i cant blame them... r.i.p popup headlights
Can you give me some aerodynamic information about 2 gen Ford Probe? It`s very aerodynamic car but need some little modifications to be perfect..I am building in the moment 2.0 boosted with 450+ HP and i need some aerodynamic help. Thank you
I get that you exaggerated the model to make things more visually obvious, but that's a very dangerous decision to make. You must know this. Because albeit the first in line consequence will be the same independently of the size, the following consequences (aka chain of events) will differ. And in this case in particular, the flow of bubbles past the popup headlights got hugely affected. That's why I have to disagree with the affirmation saying that the exaggerated popup headlights represent the same behavior generally. It is clear to me that the exaggerated model created an extreme separation of flow, so big in fact that the whole bubble-flow onwards is disturbed, the flow never gets the chance to stabilize itself, it never hits the windshield nor the roof or back. I can't say for sure, but I assume this may be a very inaccurate representation, because if the popup headlights model was represented by the same size ratio of the other parts the bubble-flow WOULD have acted differently. It might have hit the windshield, stabilizing itself, thus also probably following the roof design whilst also not having such a big disturbance.
if pop ups are interesting ..... you could as well use some other source to post videos which do not make sense to someone who has never driven a car or never is driving a car or a two wheeler ..... most two wheeler are synchronised with cars to locate the position of cars ....... ....... I don't understand why people are watching the position of cars ...........and ......all these details of car has nothing to do with my email .... you might as well use your mailing address to receive the videos of what interest you via your mail ...... pop ups should be on your mail ... not in my mail inbox ..........
No, not really. 2004 was when the pedestrian safety stuff was introduced. And that was Europe and still is Europe only. It's very much possible to have traditional pop-ups today in the US. But the drag, fuel-efficiency, and weight are more important to manufactures. But even before 2004, from 2000-2004 the number of cars with pop-ups rapidly decreased. They just weren't viable in the modern age. But I still do love them and want them to come back. They really allow for a sleek front-end.
AW11 Shirt!
Headlights go up...
F1nnisher headlights go down
Hey! It's neat meeting you guys here. Hope we get some more RCR stories soon
cuteness > speed
A perfect comparaison of static and pop-up headlights could've been done with Corolla ae86 Levin and Trueno.
Onivlas Brony Miata na vs nb
Nah, just pop off and pop up to sew
I miss pop up headlights.. :(
I consider the 80s and 90s as the golden era of pop up headlights. You had so many great cars with them. To name some; Diablo, Countach, 180, AE86 Trueno, MR2, RX-7, F40, Corvette, Porsche 928, to name a few. I know that there are more ferraris, but I can't remember their names.
Pontiac Firebird definitely
MX-5
The legend NSX
and the Honda Integra, Prelude, Mitsubishi Starion and Mazda 929
aw11 and sw20 Toyota MR2's
So basically I have 2 Airbrakes on my MX5...
pretty much.
If Bmw's GINA concept can turn into real, maybe we see pop up's again.
You'll save brake pad wear and tear!
***** Wire them into the brake lights... XD... They'll pop up every time the brakes are applied...
+GraysGarage Do you think the TRD2000gt bodykit actually affects the MR2 in a positive way?
A perfect car to test pop ups vs fixed lamps would be the AE86, it came with both types!
yup .. Trueno & Levin
1:20
Leaf: "look! a pop-up headlight!"
*zooms and lands*
B R I N G
B A C K
P O P U P S
I enjoyed this episode, thank you!
I think pop-up headlights could still work, if a manufacturer really wanted them their engineers would certainly find a way.
I agree. It would be tricky in today's market, but it could be done.
Due to pedestrian safety laws, pop up headlights are dead for good unfortunately
@@JMBA7X I've thought about this a lot. My solution would involve the headlight also having a hinge around the front of the light. Then, a solenoid at the rear could be activated by the same sensors that engage bonnet safety systems, and the headlight could fall/be pulled flat backwards into the car when a pedestrian impact is detected.
I always thought the rule pop-ups were breaking was the one prohibiting lights that move in any way, though.
Nailed it on the MX5 being happy.
One thing I would have loved to hear (and I could have missed it) is the fact that with pop-up headlights, the hoodline itself can be lower than with Integrated lights. While this does offset figures, it still shows similar horizontal and vertical separation as you displayed (just to a lesser extent). Another thing about the Rx7 that made it so good was how LOW the hoodline was in comparison to other vehicles of the time. An ultra-low hoodline and popups results in better aero during the day, which is when you should be racing anyways. :D
These videos are so good. The visualisation is worth gold!
Just pull a Takumi and flip them down while driving down a dark mountain pass in Japan to surprise your opponent as you reopen them to see your foe's shocked face lit up up by the light.
Que the eurobeat
pop up headlights more like brake assists
Great video. As a point of interest, look at the Corvettes that raced at the 24 hours of LeMans in 1969 to see how they fared in the headlights to reduce drag, weight, and increase reliability.
interesting, you can see how they sunk the lights into the body. thank you for the suggestion.
GraysGarage I'd also like to see a more in-depth look at the C4 Corvettes as they designed the pop-ups with aerodynamics in mind. Instead of just popping up, the whole housing would rotate so it could be more streamlined. Very useful when the ZR-1 set it's endurance record!
Jake Swierczek The backside of the pop-up is always the same, no matter what method is used to "raise" the headlight. There is no difference in the "streamlining". Look at any pop-up headlight and you will see this....
Thomas Kirkham Hell yeah FIA-style fixed headlights. When I get my C3, I plan on installing those on it.@070611
You may find this interesting:. I have a late model c3 Corvette, with the t-tops off and headlights up my hair used to get ruffled. I installed a large spoiler and the ruffled hair effect has been reduced.
great vid, keep them coming! I had suspected the pop up headlights on my MKII MR2 created a great deal of drag, but I did not realize the vortex height may reach as high as the top of the windshield! I installed "Revision 6" low rise headlights a few years back, and expect they are much better since the body panel at the top of the pop up is only ~10 degrees above horizontal, compared with ~45 degrees above horizontal with stock pop ups.
Thanks for the vids, I like both the technical content and the historical context!
C5 owner here. Also want to address the headlights especially in a high speed capable car liek a corvette. Can you imagine what those things are doing at 170 mph??? I bet my left nut it has a drastically lower top speed with those airbrakes deployed.
Thats a very good looking Aw11 !
Yes, a car that has it's pop-ups UP suffers a significant drag penalty.....BUT with the pop-ups DOWN the aero is significantly better than with aerodynamic headlights (non pop-ups). Pop-ups also allow the use of much more efficient headlights than the tiny projectors that must be used with modern aero headlights. There ARE advantages in pop-ups.
I just started thinking about electrical cars. Technicaly since pop up lights are bad for fuel efficency& speed. Then what about if they could be used on electrical cars, since electricity itself is cheaper? and electricity powered cars dont drive at high speeds. Basically right now on the market, there are some bubbles, leaf and tesla s. I would like to see also something resembling 90's sports car whit pop ups, but running on something cheaper.
JustaParps the problem here is, electric cars' weakest point is range. You're lucky if your car lasted 100 km on one charge. And because at night you not only increase drag, but also turn on headlights, which guzzle A LOT of energy, your 50 km turn into 25 km, which leaves you somewhere inbetween home and whereever you went to. But day-only electric cars without headlights may be an interesting concept, but not for this discussion.
I think i will try to make a mod based on my vision for Beamng Drive
I think the main point is that, with 'pop up' headlights, the surrounding bodywork is lower which is better for the frontal cross-section during the times the headlights are 'down'. Assuming the headlights are only used on a needs basis, ie darkness, the impact they have on aero is less because they would, hopefully, be travelling slower. I love my MR2 SW20...Mr. G! thank you for a great series
I believe there was one other major change in regulations that caused the demise of the pop-up headlights - sometime right around 1990 the regulations in the USA (and probably elsewhere) changed to allow the use of molded poly-carbonate headlight assemblies with a replaceable bulb. Prior to that, regulations required a sealed beam headlamp so auto manufacturers were stuck using headlights that were either round or rectangular and had a more or less flat front. There's no way to make that look good on the front of a sports car, so they hid them away with pop-up headlights. The regulatory change paved the way for the nice aerodynamically friendly headlights we see on vehicles today.
i love them, all my favorite cars have pop up headlights and never even noticed, i think it's like a fetish, of course i always suspected that Popups were terrible for aerodynamics, but still, they look WAAAAY better in my opinion, i mean:
288 GTO
F40
CHARGER '68 R/T
RX-7
240sx
NSX
AE86
who cares about the aero, right ?
True love my firebird trans am
So my mk2 Supra with a roof wing and pop up headlights is basically the opposite of racecar?
Your videos are great, there's so little information elsewhere on the net showing as good a demonstration as yours. I'd love to see comparison videos of different body types like wagon, hatch, sedan, coupe, 4x4, pickup/ute etc.
I have a C5 Z06. Note that the "fixed roof coupe" aka FRC (which is the Z06 design) is different that the standard c5. I am very interested to see these compare. GM claims that the FRC design was done as a weight reduction. I am wondering if the drag penalty is worth the weight savings?
Also, I am highly interested in seeing the effects of front/rear splitters, wheel deflectors, and hood vents.
Cant wait for more of your videos!
P.S. I am a senior in Mechanical Engineering at the University of South Florida
Brian, I'll take a look, thanks for bringing this to my attention.
Im pretty sure the drag difference between the FRC and the fastback are pretty minimal. The FRC is still slopped enough to maintain laminar flow. At least thats what my coopium tells me since I am also a z06 c5 owner!.
Another great episode. I would be intrigued to see what airflow along side of the car is though. Considering things like hub cap design, wheel farings, and lowering kits.
Totally awesome videos. Thank you for taking the time to do them, good work.
To comply with the 'fail safe rule' Honda, at least on the 3rd gen Prelude, allows you to manually turn the motors when they aren't powered. If there is power to them you get a lot of resistance and they won't move much, pull the fuses and you can raise and lower them manually.
The C5 Corvette isn’t the last car to have pop up headlights. The Ares Panther supercar is still in production today and has pop up headlights. It’s like a mix between and old NSX and a new Lamborghini.
Kyle, I need one of those Angles shirts like you have on. Looks like my car. Haha
Thanks for the video! Very informative and explained clearly, and you are also an MR2 fan :D
Fantastic channel! keep it up man!
love the aero stuff
Thanks for this great episode, i always wondered the drag coefficiency of my '85 Celica Supra especially when driving at nights. Now that its been clear, i really couldn't imagine the drag on a Cizeta-Moroder V16T which has 4 pop-up headlights!
Duskblade awesome car. I always preferred the look of the MK3 and earlier to the MK4
I expected drag with pop ups, but those figures surprised me. I own MR2, SW20. Pop ups look so cool. Modern headlamps, so often look so ugly, blobby, like Marty Feldman eyes. The other issue with plastic headlamps, is they cloud over, not letting out a great deal of light. Cost of replacements is really high, I expect much higher than the cost of the extra fuel used, I am not a fan of modern cars, I will stick with classics. BTW, love the Corvette C1, it would look at home in an art museum.
Aaaaand now I am really thinking about deleting the pop ups on my C5Z! I always knew how bad these are, but the thumbnail alone says a 1000 words. How can I street race people at night and have fun knowing im deploying a literate air brake the entire run?!?!?!
Another good video. I would say it'd be interesting to quantify in a tangible sense what 5-11% drag increase means. For example, if you take the Corvette C5 example, what measurable effect is there on speed / fuel efficiency / high speed stability / etc. assuming no other factors change? For example, if I drove a measured 300 miles in my C5 with the lights folded down, and then a measured 300 miles with the lights popped up (but negating having the lights emitting light so as to eliminate electronic drain on the engine etc.) what would the predicted difference be, using your proposed figure of ~9%? Just a thought!
There is a simple way of looking at this calum, it's called a "power requirement" plot. I can put together one for a future episode and explain it.
Awesome video. I wonder what the difference in drag would be on the FD with pop ups vs aftermarket flush lights.
Thanks for the great videos. Keep um coming!
I'm pretty sure pop up headlights aren't around anymore because of what happens to a pedestrian if they get hit by a vehicle with the lights up.
Oh, I see you mention that. Commented at the beginning
21 minute video and you only get at what I came for at the 13 minute mark. that's sick.
Another thing that would be really interesting in my opinion!
If you could take a look at & explain the principles of the 'NACA duct' as seen in various super fast ferrari's bodywork, that would show an interesting side of aerodynamics. I believe they work by pulling air out of the inside of the car i.e. To remove heat from the engine etc. would be keen to see some testing with various forms of duct designed to do this for example. Cheers!
already have this on the list. Naca ducts are very interesting. Take a look at the hood of the new nissan GTR :)
As an extension of this pop up theme can you evaluate the impact of pop up tilt sunroof on the aerodynamics.
Like Mercedes w126 300se with tilt sunroof option.
Great video, I recommend playing it at 1.25x speed for those of us with ADHD. By the time he gets to the end of making a setence, I forget the beginning of the sentence... fml...
Next video will study the clever shape of the golf ball.
I'll remember that next time a top speed run becomes a possibility.... much excite
Cool . So what would you suggest as a modern popup with minimal penalty drag ?
Great episode, Gray!
thanks for the idea!
I have enjoyed this video, would love to know more about how screen friction affects the drag.
I'd be really interested in seeing the flow around a 94 integer's headlights which are recessed into the front bumper
This is awesome!
I recently saw a video of a 180SX crashing due to excessive speed, and at the last moment it popped up the headlights. Now I know why- driver have improvised airbrakes!
180SX and "excessive speed" should not be in the same sentence. :)
Also, if excessive speed caused crashing, no missile would be capable of a successful launch.
The biggest lav I've seen in my life
great video man! keep working! ;)
Keep up the good work! :D
Pop up headlights look sinful from aerodynamic stand point of view. I did notice that pop up generated vortex helped fill the low pressure zone behind the rear window, but at a huge cost of frontal drag and flow separation.
I guess I'm one of the few people that prefer the normal lights over pop-ups. No matter how cool they are, I'm just too engineering minded to like them.
Fantastic videos, good info and those flow visuals are amazing, i have a 3d printer,do u have details on how the water flowtester is made?
Great Videos man! Thanks
Solid video! Subbed.
HAHAHA "made during my spare time, fri nights and weekends" I don't know
if that was meant to be a joke but I took it that way... mostly because
I'm a lonely nerd watching this on the weekend.
Could you please explain what is the effect of different flow types on the shear drag force and the pressure drag forces acting on the car? How does a recirculation zone affect the forces on the car in these zones? Thanks.
Would it be possible to create popup headlights with a better aerodynamic profile though?
The front of those lights is clearly a flat plane and hard edges. But Surely there are more refined shapes possible than that?
Or does the mechanical design of the popup mechanism limit what you can do with it?
69 challenger headlights are beautiful but also practical. But doesn't matter because the front end is like a wall XD
can we see a video showing rear diffusers
the older nsx looks alot better because of these lights and i hated acura/honda for changing them but after seeing this i guess i cant blame them... r.i.p popup headlights
Can you give me some aerodynamic information about 2 gen Ford Probe?
It`s very aerodynamic car but need some little modifications to be perfect..I am building in the moment 2.0 boosted with 450+ HP and i need some aerodynamic help.
Thank you
Would vortex generators placed on top of the pop ups help?
hey grey i want aerodynamics video on
1. lamborghini miura
2. mclaren p1
3. lamborghini murcielago sv
Where did you get that shirt from?
Why didn't they continue making them but more edged out?
I want to know how many pedestrians these things have ACTUALLY killed.
does the flow seperation behind the pop up head light creat down force?thx for the video!
A little bit, i guess, but it creates a huge amount of drag and completely destroys the airflow around the rest of the car.
I'd like to know if a pick-up truck will be more efficient tailgate up or down or with a tonneau cover
Mythbusters did a test on it, up won.
If I ever get a car with pop up headlights I want to do that mod so I can have my car scowl at people driving under the speed limit XD
Popup headlights is also another window motor that needs to be replaced every few years and another cluster of wires and another button on a dashboard
FUG FUEL ECONOMY, BRING BACK POP UPS ANYWAY
The 80's and 90's using their cars as emoticons.
Blind attack time!!!
my 1983 supra has pop up headlights......i know they are not aerodynamic but i think i'll pay the penalty for cool lights thanks
I get that you exaggerated the model to make things more visually obvious, but that's a very dangerous decision to make. You must know this. Because albeit the first in line consequence will be the same independently of the size, the following consequences (aka chain of events) will differ. And in this case in particular, the flow of bubbles past the popup headlights got hugely affected. That's why I have to disagree with the affirmation saying that the exaggerated popup headlights represent the same behavior generally.
It is clear to me that the exaggerated model created an extreme separation of flow, so big in fact that the whole bubble-flow onwards is disturbed, the flow never gets the chance to stabilize itself, it never hits the windshield nor the roof or back. I can't say for sure, but I assume this may be a very inaccurate representation, because if the popup headlights model was represented by the same size ratio of the other parts the bubble-flow WOULD have acted differently. It might have hit the windshield, stabilizing itself, thus also probably following the roof design whilst also not having such a big disturbance.
Hello. I want to help. You have (facebook) or (social network)? I want to ask something.
Ya shouldnt be speeding at night anyway...
if pop ups are interesting ..... you could as well use some other source to post videos which do not make sense to someone who has never driven a car or never is driving a car or a two wheeler ..... most two wheeler are synchronised with cars to locate the position of cars ....... ....... I don't understand why people are watching the position of cars ...........and ......all these details of car has nothing to do with my email .... you might as well use your mailing address to receive the videos of what interest you via your mail ...... pop ups should be on your mail ... not in my mail inbox ..........
Don't you get tired of saying Papa Pedlight SO MANY TIMES over?
the reason they are gone are because of stupid federal pedestrian safety laws, nothing to do with aerodynamic to be honest with you.
Anthony e YES EXACTLY they need to bring them back. Pop-up headlights looks 👀 very Incredible & Amazing 😉 on Sports Cars.
the reason they are gone are because of stupid federal pedestrian safety laws, nothing to do with aerodynamic to be honest with you.
No, not really. 2004 was when the pedestrian safety stuff was introduced. And that was Europe and still is Europe only. It's very much possible to have traditional pop-ups today in the US. But the drag, fuel-efficiency, and weight are more important to manufactures. But even before 2004, from 2000-2004 the number of cars with pop-ups rapidly decreased. They just weren't viable in the modern age. But I still do love them and want them to come back. They really allow for a sleek front-end.