[Flightgear-devel] electrical systems

2005-10-10 Thread syd
Hi ...thanks for the tip , I hadn't  noticed the nasal electrical system 
before. After playing around with it for an hour or two ,I had a system 
for the B1900D working great !
I never did get a good grip on classes , etc with my c++ programming 
, but I still find nasal much more flexible and easier to understand 
than xml.Thanks again ... I can get at the B1900D again .Cheers

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[Flightgear-devel] electrical systems

2005-10-07 Thread syd

Hi all 
I noticed recently that electrical outputs still show a voltage (frozen) 
when a switch is shut off.Is there a reason for this ... or is it a work 
in progress?
The reason I ask is that I want to animate lights by the voltage rather 
than switch position ... (dimming lights as the battery voltage drops , 
etc...).I just want to know if  this is the way it is going to operate , 
and I can change my animations (I'm currently working on the 
overhead light switch panel in the B1900D).Thanks in advance, I know how 
busy everyone is .Cheers

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Re: [Flightgear-devel] Electrical systems

2002-09-24 Thread Alex Perry

 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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