Pe partea centrala este la nivel, dar pe laterale este mai joasa cu cativa cm decat carenajele. Poza nu este destul de edificatoare. In #529 se vede ceva, desi acolo are rotile suspendate.

Renault Alpine A110-50 & Carlos Tavares @ Monaco F1GP

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Si unde este aerodinamica la masina asta? Ca in afara de design nu este nimic de ea.

30 May 2012, 13:35:
Toyota GT 86

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Carenaj ("difuzor") sub portbagaj cu patru aripioare.

Cadillac_ATS_2013

Aerodinamica la masini:

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http://media.daimler.com/dcmedia/0-921-145...-0-0-0-0-0.html

With a drag coefficient (Cd) value of 0.27, the aerodynamic experts at Mercedes-Benz succeeded in creating another masterpiece with the A-Class. And the A 180 BlueEFFICIENCY Edition due to follow later is even able to exceed this record for hatchback vehicles: thanks to a number of aerodynamic enhancements, this beacon of efficiency achieves a Cd value of 0.26.

Countless flow simulation studies on the computer and a great deal of fine tuning in the wind tunnel resulted in a clear goal: to enhance the basic shape of the A-Class design further, with a view to achieving an exceptional drag coefficient. This is no easy task, particularly for a hatchback model with a short rear overhang. But an improvement in the Cd value of just one hundredth will reduce fuel consumption by one tenth of a litre per 100 km when driving on the motorway at approx. 120 km/h. Based on NEDC figures, this corresponds to a CO2 reduction of one gram per kilometre. With a Cd value of 0.27 and a frontal area of 2.20 m2, the drag area (CdA) is less than 0.6 m2 – a benchmark figure for hatchback vehicles in this segment.

The detailed work behind this development is highlighted by the following examples:

- The distinctive side spoilers next to the rear window ("finlets") help to create a run-on design which significantly reduces the disruptive longitudinal vortices generated at the D-pillars.

- Flow losses at the front wheel arches have been reduced substantially with the aid of patented serrated wheel spoilers at front and rear, slots in the wheel arches and optimised hub caps. These measures result in improved wind flow around the wheel arches.

- The A-Class has an adjustable radiator shutter, already familiar in larger model series. The louvres behind the radiator grille are for the most part closed when there is no specific need for cooling air.

- The underbody has also been aerodynamically enhanced: the main floor panel features extensive cladding up to the rear wheel arch, followed by additional cladding of the rear axle. The rear silencer has also undergone aerodynamic optimisation.

- The new A-Class features exterior mirrors which have been optimised in terms of a number of details and already proven their excellent aerodynamic properties in large model series such as the S, E and C-Class, and also the B-Class. The position of the exterior mirror is adjusted in respect of the A-pillar in such a way that the airflow is directed along the side window without any significant interference or disruption.

The exterior mirrors and the low stepped height of the A-pillars reflect the fact that the work conducted in the wind tunnel was not just about optimising the flow conditions, but also about minimising wind noise. And in addition to aerodynamics and aeroacoustics, there is often another discipline to consider: in terms of water management too, the flow around the exterior mirrors and the A-pillars also has to be optimised in the wind tunnel in order to guarantee good visibility is maintained towards the rear and at the sides during wet weather.

More than with previous model series, in the case of the A-Class the aerodynamics experts at Mercedes-Benz made particular use of flow simulation (CFD, Computational Fluid Dynamics): each component was first improved over several cycles using flow simulation before having its aerodynamic properties put to the test in the wind tunnel.

Digital flow simulation is based on so-called finite volumes as a mathematical model. A volume net is formed from around 60 million hexahedrons, or cubes, and is based around the CAD data of the new A-Class. This enables the driving cycle to be simulated over a free area in a large virtual wind tunnel. The Mercedes engineers generate the airflow using a predetermined turbulence level.

Setting new standards in terms of Cd value and consumption: BlueEFFICIENCY Edition
Due to follow later is the A 180 CDI BlueEFFICIENCY Edition boasting even better consumption levels. It is among the most efficient vehicles of its class: thanks to a series of additional aerodynamic optimisation measures, it has been possible to reduce its Cd value from 0.27 (standard model) to 0.26.

These measures include:

- partially covering the upper part of the radiator grille

- aerodynamically shaped spring link coverings to improve the underbody airflow at the rear axle

- lowering of the suspension by 15 mm

CFD analysis of a Saab 9-3

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Buburuza are un Cx mult mai mic (0,35 faþã de 0,42 la Duster) la o formã oarecum similarã…Nu iau în calcul suprafaþa (2,0 m² faþã de 2,42 m²).

Sursa

Dar liftul negativ nu il iei in calcul?

La cum aratã pe dedesubt, câteodatã mã mir cum am trecut iarna ca neb1'…

LE: A fost plimbat prin nãmeþi peste garda la sol, ceea ce nu fãceam cu berlina…Poate cã spoiler-ul faþã ºi scutul motor mai preseazã zãpada, însã jumãtatea spate are destule „puncte de ancorare”…

Chiar ma mir cum a reusit lumea sa se descurce iarna pana a aparut Dusterul.

"A aparut SUV-ul Duster de la Dacia si in Germania.
…Intr-un showroom doi nemti priveau jeep-ul.
Unul ii spune celuilalt…
- Romanii astia ….ar face ORICE doar sa nu-si repare drumurile…!!!! "

Iarna trecuta oamenii nici nu au iesit din casa ... au dat si al TV.

Bancu' asta e aparut inainte sa iasa prafsteru...

Apropo de aerodinamica:

Oare unde am mai vãzut inserþiile de crom pe nervurile de la masca faþã ?
A se remarca forma braþelor ºtergãtoarelor de parbriz !

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Clio 4

Mazda 6 Sedan

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9 Oct 2012, 10:45:
aero la mcv

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9 Oct 2012, 10:50:

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Modificãri Eco la noile generaþii Logan, respectiv Sandero ?
Oare s-o fi îmbunãtãþit Cx-ul ?

Am citit tot topicul si vad ca nu a gasit nimeni o metoda buna si sigura de a monta deflectoarele originale dacia. Eu am ph2 din 2009 si as vrea sa imi montez deflectoarele de la rotile din spate. Oare merg lipite doua tije filetate cu bison epoxy metal sau ceva asemanator pe interiorul aripii? Prelungirea aceea pentru bara se monteaza usor dar deflectoarele de la rezervor si roti trebuiesc prinse cumva si nu m-as apuca sa sudez, cu toate ca asta ar fi ce-a mai buna solutie.

a zis ironick cum se face

Pai s-au specificat niste nituri filetate, doar ca sunt foarte scumpe la reprezentanta si nu se gasesc decat pe la ei.

Atunci alege solutia 2, cea pe care am adoptat-o si eu.

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super calumea inchisa , ce brand este

honda insight
a fost un fel de demo car in care au imbunatatit aeordinamica, au schimbat diverse componente cu unele facute din CFRP

http://green.autoblog.com/2012/08/06/2013-...e-review-video/



The aero tweaks give the RAV4 EV a cD of .30, which Toyota points out is more like a sedan than your average CUV.

All of the exterior's zero-emission chrome doesn't hide the fact that this is still a RAV4, it's just that this is a significantly more aerodynamic RAV4. Those mirrors, for example, are styled after the Camry that's sold in Korea and reduce the coefficient of drag by 1.1 percent. The rear spoiler? A 2.5-percent improvement. The smoother underbody, which is possible thanks to there being a battery there instead of a lot of mufflers and whatnot? An 8.2-percent improvement. All together, the aero tweaks give the RAV4 EV a cD of .30, which Toyota points out is more like a sedan than your average CUV. When asked why these sorts of little improvements were not added to the gas-burning RAV4, Toyota's Sheldon Brown, the executive program manager in the TTC's PDO department, said that it's not so simple. The underbody panels, for example, didn't need to be designed to deal with a hot exhaust pipe and so you can't just use the same plastic and shape on the ICE RAV4. The mirrors and rear spoilers, though? Those seem easy enough to use no matter what the powertrain, so we'll keep our eyes open when the new model appears.

IRONICK....dormi?

n-am vazut poze cu deflectoarele rotilor fata care le-ai bricolat...te duci sa le pozezi?
ma gandeam sa bricolez si eu dar vreau o forma, o dimensiune...
ca sa nu mai zic ca vreau si ce e in #337...

"With a Cd figure of 0.23, the CLA sets a new benchmark among not only Mercedes models, but also all series-production vehicles. The frontal surface area, Cd x A - which is crucial to aerodynamic resistance – also leads the field at 5.49 sq. ft.

The good air flow characteristics, which have a major impact on fuel consumption under everyday driving conditions, are the result of extensive aerodynamic optimization. These include
a low A-pillar shoulder with adapted A-pillar geometry,
aerodynamically optimized exterior mirrors,
low-drag wheel trims
and serrated wheel spoilers on the front and rear wheel arches.
Extensive underbody cladding,
additional cladding at the center of the rear axle,
an aerodynamically optimized muffler
and a diffuser improve the flow of air beneath the underbody."

da

cum ai facut deflectoarele de aer pentru rotile din fata?

ce dreaq ma nene Ironick, are omu' nevoie de ajutor, sari din plapuma, ia-ti papucii si mergi cu schitele la el.


@marian, nu-i nimeni obligat sa iti ofere info la o pocnitura de deget, de parca am fi sclavii tai. Nu stiu in ce relatii de (ne)prietenie te afli cu colegul nostru, insa nu asta este modalitate prin care il rogi sa te ajute...

Colegul Ironick nu spune decat o singura data ceea ce are de spus, cine prinde, bine, cine nu... Sa fie sanatos.

de unde atata frustrare si suparare pe forumul asta...zau...prea multa ranchiua si negativism din partea voastra...(Dsign, AR-18-MOS, IRONICK); fiti mãi oameni buni mai deschisi...
cumva am cerut sa se deconteze costul lucrarilor de montare/executare a deflectoarelor? nu! am cerut cateva poze, daca are, daca vrea, daca nu, nu!, SA FIE SANATOS, SA FIM SANATOSI, SI LA PUNGA GROSI!...
tot din postarile lui IRONICK am inteles ca e bine sa fie si deflectoare in fata si tot din postarile lui am aflat ca este importanta pozitionarea si dimensiunile deflectorului fata....pe paginile 3-4-5 a mai cerut cineva poze cu deflectoarele fata si a primit un raspuns asemanator...care mai e rostul topicului? d-asta n-a fost mutat la "imbunatatiri Logan"?

Imi cer scuze daca am deranjat, promit sa nu o mai fac, va doresc o zi placuta!
mi-ar face placere sa te cunosc personal Dsign...cred ca si in realitate tot la fel de egoist esti...

PS. in cazul in care nu ai inteles(de unde, limba romana e greu - du-te vere pe la scoala, ti-a placut sa bati besica pe maidan), postarea #580 era "sub spirit de gluma".

Am evidentiat unde trebuie facuta gaura pentru frane, de adaptarea pe modelul Ford la partea de interior (la Logan trece peste scut ~5cm din cauza formei de trapez pe care o are cadrul motor), de latimea asemanatoare cu a celor mai multe masini (degeaba am pus studiul pe forum ...).

un crz tunat

Din seria filmelor si pentru ca automobile ... Dacia a scos in sfarsit carenaj pentru spate. Unii ii zic difuzor de aer, altii carenaj ...

CARENAJ SPATE - 748A09735R

Ai si vreo poza, schita, ceva?
Am gasit un pret pe la 25 de euro, n-ar fi mult daca e ce trebuie.

Aerodinamica lu' peste ... not.

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IRONICK la cat costa tu mai vrei sa fie si aerodinamic

Daca acoperea tot fundul, era o treaba. Ajuta la aerodinamica. Doar ca in cazul de fata ideea montarii lui a plecat de la altceva.

si asa costa prea mult loganu,la ce stie sa faca si ce dotari are,daca mai punea Gica de la caroserie si 3 plastice sub masina crezi ca le punea gratis
astea se pun de proprietaru masinii pe banii/munca/nervii lui pentru a mai castiga CE ?asta-i intrebarea?
da ajuta la ceva acele plastice,sa-si faca culcus soareci care misuna pe la blocuri si sa intre kilograme de noroi cand mergem ce cararile patriei,sa tina umezeala sa aibe si rugina de lucru,ca am vazut ca nici nu le prea mai da cu teroson sau mai stiu eu ce vopsele minune pe sub caroserie

Vad ca acopera lateralele, dar nici pe alea prea bine.
Asta este Loganul nou? Ciudata bara spate, la alea vechi nu se vedea traversa aia de la portbagaj.

Este ala break, mcv ....



4 Feb 2014, 15:58:


Pentru ca este facut cu fundul, pentru fund ...
Nici macar nu este unit cu carenajul rotii, ce sa mai vb. de aerodinamica. daca te uiti mai atent in poze o sa observi pentru ce a fost montat.

ca sa ascunda portiunea de rugina? ca altceva nu vad si m-am uitat atent

Daca mai faceam o poza si din fata era si mai evident. Plasticul urca pana la lonjeron si se inchide inclusiv in dreptul carenajului rotii. De ce? Pentru ca esapamentul genereaza fum si caldura. Si se acumuleaza in spoiler ...

Mcv-ul 1.5 dci ECO2 chiar consuma sub 4% , l-am testat pe al meu de multe ori, insa doar la mers constant cu 80-85 km/ora in a 5-a, vara pe autostrada cu masina goala.
In rest cam 4,3%

crede-ma ca poate sa nu consume deloc, daca nu o pornesti.
pacat, mare pacat ca este creier sa inteleaga unele fenomene, dar de la atata informatie - pica in extrema cealalta....