EC130 B4 Systems Flashcards
Main rotor hub
Starflex semi-rigid, bearingless hub without a drag damper.
Laminated glass resin star.
Modular fail safe design
Main rotor blades
Fiberglass roving spar, glass fabric skin, foam core
Main Rotor Mast
Tilted 2 degrees forward. Mast casing attached by 4 suspension bars. Includes servo actuators.
Main Gearbox
Modular design attached by flexible bidirectional suspension.
2 reduction gear stages (bevel gear drive, epicycles gear train)
EBCAU
Engine Back Up Control Ancillary Unit
Controls backup fuel metering valve in case of FADEC or stepper motor failure
Fuel Capacity
144 US gal
Fuel system
Fuel level and separate low fuel sensor in fuel tank.
Primer pump in fuel tank — through Fuel cutoff — Low pressure pump — Filter including bypass and FUEL FILT clogging detector — FUEL P detector <0.5 bar — High pressure pump — Engine
Fuel flow control
Dual channel FADEC powered helicopter 28V system and by N1 driven FADEC alternator. (Even momentary loss of normal DC power causes GOV light and disables idle mode)
Duel stepper motor fuel control with separate “Resolver” that senses position.
EBCAU separate fuel control for back up automatically set to neutral position during normal operation.
Electrical system
15ah battery in tail boom.
28V electrical system
Electrical Master Box in aft cargo
Systems control unit in lower console.
ASU under floor
3 modules of the main rotor gearbox
Top to bottom:
Epicyclic module
Bevel module
Oil module
Engine Modules
5 modules
1: Driveshaft/Power Shaft
2: Axial compressor and accesory gearbox.
3: Centrifugal compressor and N1 turbine.
4. Nf turbine
5: Reduction gearbox
