Marussia struggles to improve performance, targeting to beat Caterham team again this season. First fruits of hard labour arrived at second Barcelona test where a new front wing made debut. The new piece has four flaps in total, instead of three (no 1) to increase car pace in fast turns, the main flap has a redesigned upward step before it joins the endplates (no 2), the small flow conditioner (no 3) is discarded and new endplates (no 4) to suit better the higher tier wing .
Caterham tried a modified diffuser at first Barcelona test, featuring a new perforated tab fence demarcated between the rear wing’s endplates . The new design improves diffuser’s suction ability, thus improving downforce production . The perforated diffuser concept is not new in Formula 1 but present since few years ago.
A C spec rear wing was tested on Sauber C32 at Barcelona test on February . The new one had a gurney tab-less second flap bearing a distinctive V shaped cut in the middle zone of its trailing edge, three flap fasteners instead of two and a revised DRS activator. Finally a minor and hard to notice change is the slightly extension downwards of the middle section of the second airfoil profile. Sauber with the new spec targeted to a wing offering similar amounts of downforce with a reduced drag level .
It is very usual for F1 teams to immediately launch new wings right on the first pre season test after the launch of new car. Sauber honored partially this trend, because the rear wing tested at Jerez on February was actually the A spec with an additional black colored gurney tab across the trailing edge of the second flap to increase the grip of the rear end . Furthermore a color difference, from white to black, occurred on the centre zone of the main flap. To be more accurate the white color is now absent, thus the black carbon fibres beneath the paint layer are revealed .
Sauber’s rear wing consists of two upper flaps and one lower, often called beam wing, which supports the whole wing on the car’s rear crash structure . Parallel endplates enclose all flaps to enhance downforce production . Many others characteristics, listed below, aid to make a design successful or not .
1.single profiled extra winglet on the beam wing , helps to raise downforce
2. a series of four gills on the endplate surface to bleed air to the outside , hence reduce drag
3. main flap with slightly raised upwards central zone
4. second flap with a smaller chord, this is the movable flap when DRS (Drag reduction System) is activated
5. two flap fasteners to secure inflexibility of flaps
6. the L shaped husk encapsulates the DRS activator mechanism
7. endplate’s upper sector features a deep cut, again to reduce drag
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Mc Laren discarded the wavy front wing in second Barcelona test, adopting a simpler new one in an attempt to decrease front end pitch sensitivity and help mechanics to understand and overcome the by birth stubbornness of MP4/28 to set up ideally .
- Mc Laren MP4/28 – winter testing (pre season) tech summary (formula1techandart.wordpress.com)