Utilities module usage

from rocketpy.utilities import *

%matplotlib widget

1. Estimations for your cd_s

compute_cd_s_from_drop_test(
    terminal_velocity=10,  # The desired terminal velocity (m/s)
    rocket_mass=20,  # kg
    air_density=1.225,
    g=9.80665,
)

2. Altitude of Terminal Velocity being reached

a, b, c = calculate_equilibrium_altitude(
    rocket_mass=20,
    cd_s=5,
    z0=1000,
    v0=-20,
    env=None,
    eps=1e-3,
    max_step=0.1,
    see_graphs=True,
    g=9.80665,
    estimated_final_time=10,
)

altitude_function, velocity_function, final_sol = a, b, c

final_sol

print(
    f"The terminal velocity of {final_sol['velocity']:.3} m/s is reached after {final_sol['time']:.3} seconds at altitude of {final_sol['altitude']:.6} meters."
)