Sauber C32 – D spec rear wing and DRD debut
Sauber brought another new rear wing at Barcelona test on February, The revised wing had less gills on the endplates ( three instead of four), a distinctive downwards bending main flap and finally the second flap regained the gurney tab but lost at the same time the V cut in the middle . Modifications also took place on DRS activator.
The team accompanied the new wing with a DRD ( Drag Reduction Devise ). Such a device was also tested last season on C31 but was first invented by Lotus last season and later also seen on Mercedes. It is passive, activated only by a fluid dynamic switch and involves additional twin inlets on both airbox sides, possibly the main airbox inlet, a sytem of channels housed inside the engine cover and a terminal L shaped flow air effusion. The twin inlets feed the system with air, which in low and average speeds exits normally through the large oval hot air outlet in front of the beam winglet . On the contrary at high speeds the flow switch forces air to exit through the effusion terminal just below the undersurface of the rear wing;s main flap, causing it to stall, hence reducing drag.
Mc Laren’s innovative F duct device a few years ago, probably carved the path to all recent drag reduction devices, including the Mercedes and Red Bull double DRS ( DDRS) and Lotus DRD .
- Sauber C32 – C spec rear wing at 1st Barcelona test (formula1techandart.wordpress.com)
- Sauber C32 – B spec rear wing at Jerez test (formula1techandart.wordpress.com)
- Sauber C32 Rear wing – launch spec details (formula1techandart.wordpress.com)