Source code for aerosandbox.library.landing_gear
import aerosandbox as asb
import aerosandbox.numpy as np
import aerosandbox.tools.units as u
[docs]def tire_size(
mass_supported_by_each_tire: float,
aircraft_type="general_aviation"
) -> float:
"""
Computes the required diameter and width of a tire for an airplane, from statistical regression to historical data.
Methodology and constants from Raymer: Aircraft Design: A Conceptual Approach, 5th Edition, Table 11.1, pg. 358.
Args:
mass_supported_by_each_tire: The mass supported by each tire, in kg.
aircraft_type: The type of aircraft. Options are:
- "general_aviation"
- "business_twin"
- "transport/bomber"
- "fighter/trainer"
Returns:
The required diameter and width of the tire, in meters.
"""
mass_supported_by_tire_lbm = mass_supported_by_each_tire / u.lbm
if aircraft_type == "general_aviation":
A = 1.51
B = 0.349
elif aircraft_type == "business_twin":
A = 2.69
B = 0.251
elif aircraft_type == "transport/bomber":
A = 1.63
B = 0.315
elif aircraft_type == "fighter/trainer":
A = 1.59
B = 0.302
else:
raise ValueError("Invalid `aircraft_type`.")
tire_diameter_in = A * mass_supported_by_tire_lbm ** B
if aircraft_type == "general_aviation":
A = 0.7150
B = 0.312
elif aircraft_type == "business_twin":
A = 1.170
B = 0.216
elif aircraft_type == "transport/bomber":
A = 0.1043
B = 0.480
elif aircraft_type == "fighter/trainer":
A = 0.0980
B = 0.467
tire_width_in = A * mass_supported_by_tire_lbm ** B
tire_diameter = tire_diameter_in * u.inch
tire_width = tire_width_in * u.inch
return tire_diameter, tire_width