Re: Quiet Airliners of the Future?

>"Larry Dighera" wrote in message > In the event of an in flight electrical
failure disabling the
> electronic control augmentation, it could get "interesting." What
> does Airbus use to overcome that issue?

Airbus's first answer is that it has never happened.

If an engine generator drops offline, the other generator picks up the load.
The APU generator can pick-up the load if the second engine generator drops
offline. The ram air turbine powers a back-up generator if all 3 main
generators crap out. Even if the RAT doesn't deploy, the batteries provide
at least 25 minutes of electricity. The engines' FADEC units have their own
independent generators.

Augmentation may be the wrong word. It refers to the levels of protection
afforded to the flight envelope. As long as you have a generator or a
battery, you will have control. 'Complete electrical failure' is the wording
I believe you wanted.

Try flying a light twin without touching the yoke. You have throttles,
rudder, and elevator trim, but no elevator, ailerons, flaps, or instruments.
And the gear probably won't extend. The A-320 stalls like a C-172, lots of
buffet and drops straight ahead. With calm winds and a long runway, you can
make your dinner reservations at Nanno's.

The real danger is if you lose all 3 hydraulic systems.

D.


.

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