ENH: added radius and porosity to parachute

Author: ArthurJWH

rocketpy/rocket/parachute.py

@@ -191,6 +191,7 @@ def __init__(
         self.sampling_rate = sampling_rate
         self.lag = lag
         self.noise = noise
+        self.porosity = porosity
         self.noise_signal = [[-1e-6, np.random.normal(noise[0], noise[1])]]
         self.noisy_pressure_signal = []
         self.clean_pressure_signal = []

rocketpy/simulation/flight.py

@@ -2003,7 +2003,6 @@ def u_dot_parachute(self, t, u, post_processing=False):
 
         # Get the mass of the rocket
         mp = self.rocket.dry_mass
-
         # to = 1.2
         # eta = 1
         # Rdot = (6 * R * (1 - eta) / (1.2**6)) * (