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import numpy as np
from math import sqrt
def _get_lift_rectangular(aircraft, lift=50):
L_prime = np.array([
lift / (aircraft.wing.semi_span * 2)
for _ in range(aircraft.wing.semi_span)
])
return L_prime
def _get_lift_elliptical(aircraft, L_0=3.2):
L_prime = np.array([
0.5 * L_0 / (aircraft.wing.semi_span * 2) *
sqrt(1 - (y / aircraft.wing.semi_span)**2)
for y in range(aircraft.wing.semi_span)
])
return L_prime
def get_lift_total(self, aircraft):
"""Combination of rectangular and elliptical lift."""
# F_z = self._get_lift_rectangular(aircraft) + self._get_lift_elliptical(
# aircraft)
# F_z = self._get_lift_rectangular(
# aircraft) + self._get_lift_elliptical(aircraft) / 2
# F_z = [i + j for i, j in self._get_lift_rectangular]
# return F_z
return 420
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