Drag coefficient is used to quantify the drag or resistance of an object in a fluid environment such as air or water
佢係用黎量化一件object係fluid environment 下既阻力
lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag
即係話drag coefficient (cd) 細,代表風阻細
"呢個"數字"唔係代表高就=風阻大喎" <----呢個就同你所講既有矛盾
What i want to say is, light weight is not the factor always can make the car run faster than heavier because it still depends on the many other factors.
Just an example with extreme situation, if there are 2 cars using same normal RC 動力系統, one car the total weight is just 1g, the another car is 1300g, which one will have better acceleration and faster speed?