Yes Zac,
I will try to stay lucid against my 0,2 liters / 100. But if it works, it will be the party! and many will then reduce the energy bill and pollution on their cars.
And aerodynamics?
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vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
-
vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
Hello everybody
Here are the first pictures
This is the rear underbody where will be my plate to smooth the flow on the back of the car. Note the presence of the exhaust that limits the surface of the plate (too hot ...).
Test the pattern of the backplate in the basket of the spare wheel. Checking the proximity of the exhaust line. A piece protrudes slightly from under the rear bumper to bring the air as far as possible.
The boss for the left rear wheel arch. Be careful not to forget to note on the pattern where is the front and the back.
The bosses made for the moment. Streaks are made in the back plate to be kept in the basket of the spare wheel.
Phase realization on the plate. the front face of the plate (spare wheel side) is made with drops of fiberglass that I had in stock. The face that will be exposed against the road will be made with a single piece of fiber. It will be noticed in fact that I fiberboard directly and that I plasticize and that I waterproof with polyester resin.
For the moment, my biggest disappointment is not being able to make a larger backplate surface.
Here are the first pictures
This is the rear underbody where will be my plate to smooth the flow on the back of the car. Note the presence of the exhaust that limits the surface of the plate (too hot ...).
Test the pattern of the backplate in the basket of the spare wheel. Checking the proximity of the exhaust line. A piece protrudes slightly from under the rear bumper to bring the air as far as possible.
The boss for the left rear wheel arch. Be careful not to forget to note on the pattern where is the front and the back.
The bosses made for the moment. Streaks are made in the back plate to be kept in the basket of the spare wheel.
Phase realization on the plate. the front face of the plate (spare wheel side) is made with drops of fiberglass that I had in stock. The face that will be exposed against the road will be made with a single piece of fiber. It will be noticed in fact that I fiberboard directly and that I plasticize and that I waterproof with polyester resin.
For the moment, my biggest disappointment is not being able to make a larger backplate surface.
0 x
Marty
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vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
Good the back plate is mounted.
I closed half of the grille (small test this morning in town to check that it does not heat).
No time for the moment to finish the wheeling.
I go on a weekend and I already check if it fits on the road (and the highway). I will see how to evolve the conso then.
I closed half of the grille (small test this morning in town to check that it does not heat).
No time for the moment to finish the wheeling.
I go on a weekend and I already check if it fits on the road (and the highway). I will see how to evolve the conso then.
0 x
Marty
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vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
Hello everybody
Ben it's not top all this will be necessary that I improve a little the side realization.
While going down in Ardèche, I fell on Saturday morning on a good big wet depression with wind and fleet jumps.
My radiator clogging did not resist the stunts and torrents of water.
Before entering the highway, I glanced at the plate and there I saw that it was bending a few inches around the edges. In short, from there, no need to leave it in place and I fired (back in the trunk with the sweet smell of polyester yum yum ...
). Obviously, I should have put a second layer of fiber!
But hey, I'm not going to ruin my pleasure! I have already seen that the dimensions were good because nothing comes to type in a suspension arm for example. There is also no whistling or other inconvenience (this is sometimes the case with aero modifications on some cars: fins for example show dirty aerodynamic noise at certain speeds).
The goal now is to equip the whole with something really insensitive to water (yes I know I should have thought about it but I thought it was already the case).
As luck would have it, old billboards have just been stored in my office: good surface, very rigid, rather thin ...
There's more to work now!
@+
Ben it's not top all this will be necessary that I improve a little the side realization.
While going down in Ardèche, I fell on Saturday morning on a good big wet depression with wind and fleet jumps.
My radiator clogging did not resist the stunts and torrents of water.
Before entering the highway, I glanced at the plate and there I saw that it was bending a few inches around the edges. In short, from there, no need to leave it in place and I fired (back in the trunk with the sweet smell of polyester yum yum ...
). Obviously, I should have put a second layer of fiber!
But hey, I'm not going to ruin my pleasure! I have already seen that the dimensions were good because nothing comes to type in a suspension arm for example. There is also no whistling or other inconvenience (this is sometimes the case with aero modifications on some cars: fins for example show dirty aerodynamic noise at certain speeds).
The goal now is to equip the whole with something really insensitive to water (yes I know I should have thought about it but I thought it was already the case).
As luck would have it, old billboards have just been stored in my office: good surface, very rigid, rather thin ...
There's more to work now!
@+
0 x
Marty
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babache8
- I learn econologic
- posts: 38
- Registration: 03/01/06, 00:41
- Location: Vendres beaches, herault
- x 1
Hello hello. I was wondering, since you are an aero specialist, if you could tell me or even show me cars that have an efficient blade. I admit it is to copy. What is the basic principle of a blade? To chase the air under the car? Create a depression under the body by chasing the air on the sides? Being a mechanic, I know the aerodynamic problems of 2 wheels, but not cars. I'm not against a little help to enlighten me. Thank you.
0 x
If there is no solution, there is no problem!
-
vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
babache8 wrote:Hello hello. I was wondering, since you are an aero specialist, if you could tell me or even show me cars that have an efficient blade. I admit it is to copy. What is the basic principle of a blade? To chase the air under the car? Create a depression under the body by chasing the air on the sides? Being a mechanic, I know the aerodynamic problems of 2 wheels, but not cars. I'm not against a little help to enlighten me. Thank you.
Hello,
I am not a specialist but I am interested.
The blade (or splitter) has several function. The first is to create support on the front of the car. Indeed, the air is "trapped" on the front of the car and support on the blade: it creates a support (deportation) before. In cars this is precisely what we are looking for because we can easily find support at the back (aileron and extractor) but the front is not obvious.
The second thing is that it actually smooths some of the air flows under the car and that the air is diverted to the sides (normally smoother) of the car.
The third is related to the cooling: the overpressure thanks to the splitter makes it possible to have a more "easy" air intake in the engine compartment (if the cooling is at this place!) And that appreciably improves the possibilities of cooling.
Most blades look alike. The length is free but I read that the gain beyond 15 cm is really minimal. The best, in my opinion and for a real improvement and aero efficiency, is to look at what is done in supertourism.
John,
That's almost it
: the color is the good but the wheel arch is less closed in my opinion ... as for the angle of the windshield ... ahhh .. would still stall my 1.87m in the car 
!
0 x
Marty
.The blade (or splitter) has several function. The first is to create support on the front of the car
Apart from rallying, I do not see the point of putting more support in front. More support = more drag, = more power ...
Most blades look alike. The length is free but I read that the gain beyond 15 cm is really minimal. The best, in my opinion and for a real improvement and aero efficiency, is to look at what is done in supertourism.
It's almost that: the color is good but the wheel arch is less closed in my opinion ... as to the angle of the windshield ... ahhh .. would still stall my 1.87m in the car !
Do like kakous, remove the seat and put a cap ...
Otherwise to consume less is the solution to sell the sax and buy a used Smart ... According to ADEME comparisons it is by far the most economical cars ... to use .
0 x
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vttdechaine
- I understand econologic
- posts: 162
- Registration: 23/03/06, 16:01
- Location: Eastern France near Switzerland
Apart from rallying, I do not see the point of putting more support in front. More support = more drag, = more power ...
Precisely the interest is to avoid passing air below the box. If the aerodynamic modifications are made properly, the lowering of the drag can go hand in hand with a reduction of lift (for a series car it is not very interesting it's true).
On the other hand, it is true that the essence of drag reduction is always to profile the entire car and to make it get closer to a wing profile (or drop of water) which remains a problem. very strong form.
Conversely, of course, a reduction in lift does not have to go hand in hand with an increase in drag. Thus, most 'wide' shields (as seen on Super5 Vs GT Turbo sport versions) help to reduce drag and lift.
The interest of the support (inverse of the lift) or of the deportance is to be able to pass more quickly in turn. As such, all categories of compet 'cars are concerned: from karting to NASCAR!
Do like kakous, remove the seat and put a cap ...
Uh ... It's not going to improve the roofing (especially with the cap
)!Otherwise to consume less is the solution to sell the sax and buy a used Smart ... According to ADEME comparisons it is by far the most economical cars ... to use .
Yeah, but when you tasted the Saxo Mazout ... you can not say no! And besides, I still need to put my bikes and my girlfriend (or the opposite) in the cockpit
!
0 x
Marty
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laurent_caen
- I understand econologic
- posts: 113
- Registration: 07/05/06, 12:41
aerodynamisme
hello all the world
I find your subject very interesting I am interested myself bcp aerodynamics
on the other hand, I am super frustrated, although member, I do not have access to doc, how is it?
thanks in advance
I find your subject very interesting I am interested myself bcp aerodynamics
on the other hand, I am super frustrated, although member, I do not have access to doc, how is it?
thanks in advance
0 x
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