low cd figures are thrown about but everyone seems to ignore frontal area which makes the cd figure relative, ef crx, delsol, mx5, mr2, mrs, calibra these are the kings ,imo, new cars just got too big still at least with the new transmissions theyve often got awesome ratio for great highway fe. I love these videos btw. My uncle had one of your books i read a lot 20 odd years ago.
@@StefanKrunic As a Calibra owner my self, it's funny but most of the aerodynamics enchantments are focused on the rear of the car. Sure, you have the small headlights with small grill and radiator openings, but the rear has fuel tank diffusor, rear bumper design for less drag (there is a small kink in the bumper going outwards) and an aerodynamic boot lid with a small ducktail. Also the plastic side skirts play a good part as well.
I've had a strange desire to have one of these Mirages for a while. Guess I'm a sucker for underpowered econo hatch backs. Too bad it's still too expensive to buy as a "fun" project and not something I would probably want to drive on a day-to-day basis as my main car.
Ji Julian, I work for a mitsubishi dealership, and can tell you there's different spoilers for the Mirage/space star. The white car had the early spoiler, the pink car has a later model, but I think there's yet another type
We didn't get that model of Mitsubishi here in the states, but its design of the rear spoiler and rear side spats will influence my designs for small RV/Caravan trailers. Thanks for noting the Little Mitsu and posting on it.
The Proton Iriz has that kind of spoiler, side fins and all. But, sometimes I think they look like they're mounted horizontally instead of following the roofline,. I know mine looks that way. Or they might not have the best fit (not a brand known for the best build quality) so mine might just not have been mounted properly. I'd have to double check.
I have done some cfd on a generic hatchback with/out one of these spoilers, also over a range of inclinations. As it turns out those spoilers do increase downforce but it is predominately under the car, despite the roughness. Reducing lift on the roof tends to be the best you can get out of these directly. However, saying that a poor one/one lift/drag ratio is present for high inclinations.
@@JulianEdgar Haha no. Its a hobby. Haven't really collated the data. I plan to do a well structure repeat and present it in a video like the one I just put up on my channel. That may be in a couple of months though.......
In some of the cars I have seen vents / slot in the spoiler like in Lamborghini Urus. It will be great if you can provide some insight to that also . I am big fan of you ,they way you see aerodynamics .
Appreciate you sharing your research and findings. Could you make a video on reducing roof lift of a fastback car. I know a smooth underbody will combat this. But would a roof spoiler help, Vortex generators, or something else. Thanks
My Lexus CT200h F sport spoiler has two downward angled air passages that I am curious about and would love to hear you opinion on if you ever are looking for an interesting rear roof spoiler on a hatchback to critique. Great video! Much thanks:)
@@fdj6429 Links often get removed by TH-cam. Like this? www.ct200hforum.com/threads/2014-f-sport-roof-spoiler-mounted-on-my-2013-ct-f-sport.129993/#lg=attachment_xfUid-2-1636609629&slide=0 The openings are just to keep the rear window cleaner, I think.
Good morning from London, I've been watching your videos as a novice, as I have a vauxhall/opel corsa D hatchback (limited edition), and was about to install a rear wing upward facing spoiler with canards on it to make the air flow upwards for more downforce however now I'm having second thoughts, I would like to make the car faster, what would you recommend interms of the spoiler and front side splitters, (given that you already taught us how important and undertray is to get more air under the car as possible, An upward facing spoiler spoiler increases the wake size right? Wake increase means more drag and stability yet a slower car from what I understand, Would it be better to have a downwards inclined spoiler for more lift/speed? All in all my car isnt the fastest so I want to make it as aerodynamic as possible, would you be able to shed some advice? Kind regards Joshua Mbelolo
Buy my big book. Read it and you'll save more than the purchase price in your first modification. www.veloce.co.uk/store/Modifying-the-Aerodynamics-of-Your-Road-Car-p135968914
Could you review the Tesla model Y? The performance model has a very small hatch spoiler added, does it do anything? The rear of my Y gets unbelievably dirty, which I feel is because the aerodynamics.
Yes it is likely that the performance model's rear spoiler reduces lift. The rear of the car getting dirty is indeed aero, but there's no easy way of improving that without increasing drag. If someone wants to lend me a Model Y, I am happy to do some testing.
after seeing this, I'm very curious about what the spoilers are doing on the dodge challenger 392 and the vipers from the 90s. they have a duck tail type spoiler that sways upward...they might be creating drag😕
@@JulianEdgar well its a city car and its normal place of existence is in the city around 20-30mph where aero doesn't really matter. Its hardly going to be doing 70MPH on a motorway everyday for miles and miles where you would see a benefit to the good aero.
I see lots of small cars on freeways? Sure it will be less helpful in slow moving city traffic, but the rear spoiler is useful and functional on that car.
What is your take on the gap, some have it other "rollerskate" body types have a solid spoiler? Is it form(style) or function (an aero featcher)? Looks like it acts like slats&flaps .
low cd figures are thrown about but everyone seems to ignore frontal area which makes the cd figure relative, ef crx, delsol, mx5, mr2, mrs, calibra these are the kings ,imo, new cars just got too big still at least with the new transmissions theyve often got awesome ratio for great highway fe. I love these videos btw. My uncle had one of your books i read a lot 20 odd years ago.
I wonder why does he not have a video on the Calibra, it held the record for nearly 10 years after all.
@@StefanKrunic As a Calibra owner my self, it's funny but most of the aerodynamics enchantments are focused on the rear of the car. Sure, you have the small headlights with small grill and radiator openings, but the rear has fuel tank diffusor, rear bumper design for less drag (there is a small kink in the bumper going outwards) and an aerodynamic boot lid with a small ducktail. Also the plastic side skirts play a good part as well.
I've had a strange desire to have one of these Mirages for a while. Guess I'm a sucker for underpowered econo hatch backs.
Too bad it's still too expensive to buy as a "fun" project and not something I would probably want to drive on a day-to-day basis as my main car.
Yes, lightweight good aero. These are fundamentals for a good sports car.
Ji Julian, I work for a mitsubishi dealership, and can tell you there's different spoilers for the Mirage/space star. The white car had the early spoiler, the pink car has a later model, but I think there's yet another type
Thanks. It would be great if you could link to some pics of the different types, or even parts diagrams. It's the pink one I looked at closely.
@@JulianEdgar I will have a look next week, see what we havew in stock yet and if one comes in for maintenance.
We didn't get that model of Mitsubishi here in the states, but its design of the rear spoiler and rear side spats will influence my designs for small RV/Caravan trailers. Thanks for noting the Little Mitsu and posting on it.
My latest book has a major section on trailers and caravans - www.amazon.com/Vehicle-Aerodynamics-Modification-Development-alternative/dp/B0C87VYVL8
Thx! Will check it out. Add it to my library. @@JulianEdgar
tank you for great information
The Proton Iriz has that kind of spoiler, side fins and all. But, sometimes I think they look like they're mounted horizontally instead of following the roofline,. I know mine looks that way. Or they might not have the best fit (not a brand known for the best build quality) so mine might just not have been mounted properly. I'd have to double check.
I have done some cfd on a generic hatchback with/out one of these spoilers, also over a range of inclinations. As it turns out those spoilers do increase downforce but it is predominately under the car, despite the roughness. Reducing lift on the roof tends to be the best you can get out of these directly. However, saying that a poor one/one lift/drag ratio is present for high inclinations.
Do you have a formal technical paper I can reference?
@@JulianEdgar Haha no. Its a hobby. Haven't really collated the data. I plan to do a well structure repeat and present it in a video like the one I just put up on my channel. That may be in a couple of months though.......
In some of the cars I have seen vents / slot in the spoiler like in Lamborghini Urus. It will be great if you can provide some insight to that also . I am big fan of you ,they way you see aerodynamics .
@@TiTotlar See th-cam.com/video/448OZB83Txg/w-d-xo.html
My 2000my 8L Audi S3 had a good spoiler for a hatch
The 2020 Aston Martin DBX suv has a rear spoiler wing (detached from the roof) so I wonder how that does.
See th-cam.com/video/448OZB83Txg/w-d-xo.html
Appreciate you sharing your research and findings. Could you make a video on reducing roof lift of a fastback car. I know a smooth underbody will combat this. But would a roof spoiler help, Vortex generators, or something else. Thanks
th-cam.com/video/QwSHo8UPDsQ/w-d-xo.html Also look at my series 'Developing the air brake, rear fins and a spoiler' that was done on a fastback car
How to remove mirage spoiler to reduce weight
My Lexus CT200h F sport spoiler has two downward angled air passages that I am curious about and would love to hear you opinion on if you ever are looking for an interesting rear roof spoiler on a hatchback to critique. Great video! Much thanks:)
Link to pic?
I wasn’t sure how to attach images of my car so I attached links to images I found.
@@fdj6429 Links often get removed by TH-cam. Like this? www.ct200hforum.com/threads/2014-f-sport-roof-spoiler-mounted-on-my-2013-ct-f-sport.129993/#lg=attachment_xfUid-2-1636609629&slide=0 The openings are just to keep the rear window cleaner, I think.
Im sure that wasn’t the most efficient way to share images…sorry about that.
@@JulianEdgar ah! I wouldn’t have thought about that. Well thanks again
Would you be able to explain why some spoilers have two vents or holes? What are they used for?
Keep the rear window cleaner.
Can you make a video on the 2012/2013 Kia Optima SX Turbo
Not unless you provide a car or a very detailed technical paper!
Good morning from London, I've been watching your videos as a novice, as I have a vauxhall/opel corsa D hatchback (limited edition), and was about to install a rear wing upward facing spoiler with canards on it to make the air flow upwards for more downforce however now I'm having second thoughts, I would like to make the car faster, what would you recommend interms of the spoiler and front side splitters, (given that you already taught us how important and undertray is to get more air under the car as possible,
An upward facing spoiler spoiler increases the wake size right? Wake increase means more drag and stability yet a slower car from what I understand,
Would it be better to have a downwards inclined spoiler for more lift/speed?
All in all my car isnt the fastest so I want to make it as aerodynamic as possible, would you be able to shed some advice?
Kind regards
Joshua Mbelolo
Buy my big book. Read it and you'll save more than the purchase price in your first modification. www.veloce.co.uk/store/Modifying-the-Aerodynamics-of-Your-Road-Car-p135968914
@@JulianEdgar haha ahh well played mate, that's a fair point indeed, thanks for the link 👍🏽
i didnt know that the flat surface on the rear bumper is for the wake
It's a separation edge.
Could you review the Tesla model Y? The performance model has a very small hatch spoiler added, does it do anything? The rear of my Y gets unbelievably dirty, which I feel is because the aerodynamics.
Yes it is likely that the performance model's rear spoiler reduces lift. The rear of the car getting dirty is indeed aero, but there's no easy way of improving that without increasing drag. If someone wants to lend me a Model Y, I am happy to do some testing.
@@JulianEdgar I am in NY, close?
About 10,000 miles...
after seeing this, I'm very curious about what the spoilers are doing on the dodge challenger 392 and the vipers from the 90s. they have a duck tail type spoiler that sways upward...they might be creating drag😕
Very likely increasing drag. But reducing rear lift.
What's the deal with the centre section of the spoiler being raised? Is that to increase the pressure between that central bump and the side fons?
I don't know if it has any special significance.
very interesting and educational. its a shame Mitsubishi put it on the car that totally does not need it lol
Why do you say that? It would work to reduce drag, and that will help in the car's fuel economy / mileage.
@@JulianEdgar well its a city car and its normal place of existence is in the city around 20-30mph where aero doesn't really matter. Its hardly going to be doing 70MPH on a motorway everyday for miles and miles where you would see a benefit to the good aero.
I see lots of small cars on freeways? Sure it will be less helpful in slow moving city traffic, but the rear spoiler is useful and functional on that car.
What is your take on the gap, some have it other "rollerskate" body types have a solid spoiler?
Is it form(style) or function (an aero featcher)?
Looks like it acts like slats&flaps .
I will need to see some pics to comment.
@@JulianEdgar the thumbnail just left of the green arrow , and mirrored on the other side.
@@daviddroescher There's no gap there