The Cd varied between approximately 2.1 and 3.2. As weather conditions and the possible presence of ascendants or descents could modify the Cd values, we could make an average which would give something like a Cd of 2.65.
On the video on a previous comment one can see that Cd is improved when the parachute center is pulled (reefed parachute to increase drag at 0:45).
The following parachute is in a good place for high Cd tested by Fruity Chutes:
We can see that there is a big central hole and this hole is pulled.
It is not impossible that this has the effect of reducing the projected surface, which would initially require more fabric for the same projected surface in order to benefit of a higher Cd, which remains to be verified.
Perhaps I could increase the Cd of this cheap parachute game by pulling the central hole (perhaps it would be better with a larger central hole). Actually I obtained a Cd above 1, but not far more.
