28 lines
584 B
Python
28 lines
584 B
Python
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import numpy as np
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def u_nandasena(b, c, C_d, C_l, rho_s, rho_w=1e3, theta=0, g=9.81, **_):
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return np.sqrt(
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(2 * (rho_s/rho_w - 1) * g * c * np.cos(np.radians(theta)))
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/ C_l
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)
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const = {
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"a": 4,
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"b": 2.5,
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"c": 2,
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"C_d": 1.95,
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"C_l": 0.178,
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"theta": 0,
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"rho_s": 2.7e3,
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}
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u = u_nandasena(**const)
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u_ola = 14.5
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print(f"Nandasena: u={u:5.2f}m/s")
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print(f"Olaflow: u={u_ola:5.2f}m/s")
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print(f"Gap: du={abs(u_ola - u):5.2f}m/s")
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print(f"Gap: du={abs(u_ola - u)/u:5.2%}")
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print(f"Gap: du={abs(u_ola - u)/u_ola:5.2%}")
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