> Here are some ideas about modeling electrical systems that are general
> enough to handle most airplanes.

Nice list, but the only item that is relevant for light aircraft is the bus.

> 2) Battery, nominally 28 Volt, which will last about 30 minutes if it is the
> only power source available.  It is normally supplied by the battery
> charger, so if the charger is powered the battery is transparent.

Light aircraft batteries are different; they use a contactor relay and
also operate the field coil of the alternator (not generator) without
going through a bus.  The battery charger is (in this case) a regulator
that has its own circuit breakers and has permission to damage the
interior of avionics when the alternator output increases from zero
to normal operating voltage.  From memory, the battery is 24 volts,
but the electrical bus is 28 volts when alternator is running.

> 3) Ground Power, supplies 115 Volt, 400 cycle AC power to a "Ground Power
> Bus".  This is plugged into the side of the airplane, and is either there or
> it isn't.  A light in the cockpit advises if its there.

Ground power on a light aircraft is the same as alternator power.

> 9) Bus, a simple component which only keeps a list of suppliers and a list
> of users. AC or DC.

The biggest problem with a bus is managing the list of circuit breakers,
knowing how to trip them automatically and whether the pilot can manually
trip them.  Some cannot be tripped manually (inconvenient).


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