Provides structural weight correlations for aircraft components applicable to all aircraft configurations.
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Provides structural weight correlations for aircraft components applicable to all aircraft configurations.
◆ landing_gear()
| def SUAVE.Methods.Weights.Correlations.Common.landing_gear.landing_gear |
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vehicle, |
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landing_gear_wt_factor = 0.04 |
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) |
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Calculate the weight of the landing gear assuming that the gear
weight is 4 percent of the takeoff weight
Assumptions:
calculating the landing gear weight based on the takeoff weight
Source:
N/A
Inputs:
TOW - takeoff weight of the aircraft [kilograms]
landing_gear_wt_factor - landing gear weight as percentage of TOW [dimensionless]
Outputs:
weight - weight of the landing gear [kilograms]
Properties Used:
N/A
◆ payload()
| def SUAVE.Methods.Weights.Correlations.Common.payload.payload |
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vehicle, |
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wt_passenger = 195 * Units.lbs, |
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wt_baggage = 30 * Units.lbs |
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) |
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Calculate the weight of the payload and the resulting fuel mass
Assumptions:
based on FAA guidelines for weight of passengers
Source:
N/A
Inputs:
TOW - [kilograms]
wt_empty - Operating empty weight of the aircraft [kilograms]
num_pax - number of passengers on the aircraft [dimensionless]
wt_cargo - weight of cargo being carried on the aircraft [kilogram]
wt_passenger - weight of each passenger on the aircraft [kilogram]
wt_baggage - weight of the baggage for each passenger [kilogram]
Outputs:
output - a data dictionary with fields:
payload - weight of the passengers plus baggage and paid cargo [kilograms]
pax - weight of all the passengers [kilogram]
bag - weight of all the baggage [kilogram]
fuel - weight of the fuel carried [kilogram]
empty - operating empty weight of the aircraft [kilograms]
Properties Used:
N/A
◆ systems()
| def SUAVE.Methods.Weights.Correlations.Common.systems.systems |
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vehicle | ) |
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Calculate the weight of the different engine systems on the aircraft
Assumptions:
numbers based on FAA regulations and correlations from previous aircraft
Source:
http://aerodesign.stanford.edu/aircraftdesign/structures/componentweight.html
Inputs:
vehicle.passengers - total number of seats on the aircraft [dimensionless]
vehicle.systems.control - specifies if the control system is fully power,
partially powered, or not powered [dimensionless]
wing.areas.reference - area of the horizontal tail [meters**2]
wing.areas.reference - area of the vertical tail [meters**2]
vehicle.reference_area - area of the wing [meters**2]
vehicle.systems.accessories - determines type of instruments, electronics,
and operating items based on type of vehicle [dimensionless]
Outputs:
output - a data dictionary with fields:
wt_flt_ctrl - weight of the flight control system [kilograms]
wt_apu - weight of the apu [kilograms]
wt_hyd_pnu - weight of the hydraulics and pneumatics [kilograms]
wt_instruments - weight of the instruments and navigational equipment [kilograms]
wt_avionics - weight of the avionics [kilograms]
wt_opitems - weight of the optional items based on the type of aircraft [kilograms]
wt_elec - weight of the electrical items [kilograms]
wt_ac - weight of the air conditioning and anti-ice system [kilograms]
wt_furnish - weight of the furnishings in the fuselage [kilograms]
Properties Used:
N/A
◆ wing_main()
| def SUAVE.Methods.Weights.Correlations.Common.wing_main.wing_main |
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vehicle, |
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wing, |
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rho, |
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sigma, |
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computation_type = 'segmented' |
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) |
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Calculate the wing weight of the aircraft based on the fully-stressed
bending weight of the wing box
Assumptions:
calculated total wing weight based on a bending index and actual data
from 15 transport aircraft
Source:
http://aerodesign.stanford.edu/aircraftdesign/AircraftDesign.html
search for: Derivation of the Wing Weight Index
Inputs:
vehicle - data dictionary with vehicle properties [dimensionless]
-.mass_properties.max_takeoff: MTOW [kilograms]
-.mass_properties.max_zero_fuel: zero fuel weight aircraft [kilograms]
-.envelope.ultimate_load: ultimate load factor
wing - data dictionary with specific wing properties [dimensionless]
-.areas.reference: wing reference surface area [m^2]
-.sweeps.quarter_chord: quarter chord sweep angle [deg]
-.spans.projected: wing span [m]
-.thickness_to_chord: thickness to chord of wing
-.taper: taper ratio of wing
-.chords.root: root chord [m]
Outputs:
weight - weight of the wing [kilograms]
Properties Used:
N/A
1.8.15