RCAIDE.Library.Methods.Mass_Properties.Weight_Buildups.Conventional.Transport.Raymer.compute_systems_weight

compute_systems_weight

compute_systems_weight(vehicle)

Calculates the system weight based on the Raymer method

Assumptions:

Number of flight control systems = 4 Max APU weight = 70 lbs Assuming not a reciprocating engine and not a turboprop System Electrical Rating: 60 kv · A (typically 40-60 for transports, 110-160 for fighters & bombers) Uninstalled Avionics weight: 1400 lb (typically= 800-1400 lb)

Source:

Aircraft Design: A Conceptual Approach (3rd edition) Sforza, P. (2014). Commercial airplane design principles. Butterworth-Heinemann. https://doi.org/10.1016/B978-0-12-419953-8

Inputs:

vehicle - data dictionary with vehicle properties [dimensionless]

-.networks: data dictionary containing all propulsion properties -.number_of_engines: number of engines -.fuselages[‘fuselage’].lengths.total: fuselage total length [meters] -.fuselages[‘fuselage’].width: fuselage width [meters] -.fuselages[‘fuselage’].heights.maximum: fuselage maximum height[meters] -.mass_properties.max_takeoff: MTOW [kilograms] -.design_mach_number: design mach number for cruise flight -.design_range: design range of aircraft [nmi] -.passengers: number of passengers in aircraft -.wings[‘main_wing’]: data dictionary with main wing properties

-.sweeps.quarter_chord: quarter chord sweep [deg] -.areas.reference: wing surface area [m^2] -.spans.projected: projected span of wing [m] -.flap_ratio: flap surface area over wing surface area

-.payload: payload weight of aircraft [kg]

Outputs:

output - a data dictionary with fields:

W_flight_controls - weight of the flight control system [kilograms] W_apu - weight of the apu [kilograms] W_hyd_pnu - weight of the hydraulics and pneumatics [kilograms] W_instruments - weight of the instruments and navigational equipment [kilograms] W_avionics - weight of the avionics [kilograms] W_electrical - weight of the electrical items [kilograms] W_ac - weight of the air conditioning and anti-ice system [kilograms] W_furnish - weight of the furnishings in the fuselage [kilograms] W_anti_ice - weight of anti-ice system [kilograms]

Properties Used:

N/A