26.04.2015, 17:54
Ich hatte mich die Tage gefragt, welchen cW Wert die verschiedenen C7 Z06 Modelle wohl haben 
Leider gibt es seitens GM darüber keine näheren Informationen
Das habe ich im Internet dazu gefunden :
Calculating more realistic drag coefficients for 2015 Chevrolet Corvette Z06 coupe and convertible
The official story regarding the 2015 Corvette C7 Z06 aerodynamics as told by +General Motors marketing and +Tadge Juechter throws just a single figure, 0.37 as the drag coefficient apparently applicable to all body styles and levels of ground effects. How is this possible and is even the starting point a valid figure?
Unfortunately, in spite of Tadge Juechter hoping everyone just takes his word on it, not even the starting point is truthful. Even more unfortunately for Juechter, there are ways these days to run aerodynamic emulations to derive a fairly precise drag coefficient for a given body shape.
A quick set of simulations and calculations, using the scanned shape of Z06 coupe and convertible yield some interesting findings. Specifically, even in its most basic form, 1LZ coupe with level one ground effects, the drag coefficient comes in at 0.41, quite a bit of difference from the official story but certainly in full agreement with those few performance figures, especially mid line acceleration, available to the general public.
With level 3 aero, the coupe manages 0.43 Cd, with top on the car and 0.44, with the roof panel off.
Things get considerably worse for the convertible version of the newest Z06, with the starting figure at 0.46, while the highest level aero delivers a whooping 0.47, with top up and eyebrow raising 0.49, with the top down. Now, this raises some serious questions about the claimed top speed limit, advertised as 195 mph for the coupe with the lowest level of aero and 186 mph for the highest level. Given these figures, it is actually next to impossible for the newest Z06 to achieve these figures and for convertible, these figures should be lowered by additional 8 mph, making this one of the slowest Corvettes since C5 came about.
Posted 6th January by Peter MJ
Wenn ich es richtig verstehe, hat der Herr Juechter zwar 0.37 proklamiert, allerdings sind die wahren Werte wohl erheblich schlechter. Für mein Cabrio scheint es offensichtlich dann erst recht schlecht auszusehen.
Bin dann mal auf die Windkanalmessung im Supertest gespannt. Womöglich sind die ja obige Werte zu pessimistisch ?
Gruß
Marzadro
Leider gibt es seitens GM darüber keine näheren Informationen
Das habe ich im Internet dazu gefunden :
Calculating more realistic drag coefficients for 2015 Chevrolet Corvette Z06 coupe and convertible
The official story regarding the 2015 Corvette C7 Z06 aerodynamics as told by +General Motors marketing and +Tadge Juechter throws just a single figure, 0.37 as the drag coefficient apparently applicable to all body styles and levels of ground effects. How is this possible and is even the starting point a valid figure?
Unfortunately, in spite of Tadge Juechter hoping everyone just takes his word on it, not even the starting point is truthful. Even more unfortunately for Juechter, there are ways these days to run aerodynamic emulations to derive a fairly precise drag coefficient for a given body shape.
A quick set of simulations and calculations, using the scanned shape of Z06 coupe and convertible yield some interesting findings. Specifically, even in its most basic form, 1LZ coupe with level one ground effects, the drag coefficient comes in at 0.41, quite a bit of difference from the official story but certainly in full agreement with those few performance figures, especially mid line acceleration, available to the general public.
With level 3 aero, the coupe manages 0.43 Cd, with top on the car and 0.44, with the roof panel off.
Things get considerably worse for the convertible version of the newest Z06, with the starting figure at 0.46, while the highest level aero delivers a whooping 0.47, with top up and eyebrow raising 0.49, with the top down. Now, this raises some serious questions about the claimed top speed limit, advertised as 195 mph for the coupe with the lowest level of aero and 186 mph for the highest level. Given these figures, it is actually next to impossible for the newest Z06 to achieve these figures and for convertible, these figures should be lowered by additional 8 mph, making this one of the slowest Corvettes since C5 came about.
Posted 6th January by Peter MJ
Wenn ich es richtig verstehe, hat der Herr Juechter zwar 0.37 proklamiert, allerdings sind die wahren Werte wohl erheblich schlechter. Für mein Cabrio scheint es offensichtlich dann erst recht schlecht auszusehen.
Bin dann mal auf die Windkanalmessung im Supertest gespannt. Womöglich sind die ja obige Werte zu pessimistisch ?
Gruß
Marzadro
