What means ADG deployment?

Question

and what means bus load-shedding?

Answer 1

Give the points to Charles M.

Any way, to clarify his answers... ADG deployment on an airliner is almost unheard of, but not completely. When that Boeing 767 ran out of fuel in Canada (i.e. the Gimli Glider), ADG deployed to generate electricity in order to power the hydraulics and the basic instruments in case of engine or generator failure.

(http://en.wikipedia.org/wiki/Gimli_Glide...

Bus load shedding is basically trying to turn off stuff that use power to reduce the load on the circuit bus. Circuitbreakers are designed to trip if it detects an overload of power, i.e. too many things happening on the same circuit. So you have to "shed" (remove, like shedding skin) the load (usage) on the bus itself in order to get the circuit working again. If you just reset the breakers, it'll just trip again. So you have to shed the load, then try the breakers again.

This sounds like you're reading one of Stephen Coont's Intruder novels. ;)

Answer 2

Its an Air Driven Generator and its deployed when engines (aircraft) fail and provides some power to the planes systems

Answer 3

ADG= Air Driven Generator.  Basically as the plane flies along, it sticks out into the wind and air turns it producing electrical power for the bare minimum of electrical systems and also powers a hydraulic pump to move the flight controls.

Most of the logic behind them is based on losing electrical power only with weight off wheels (in flight), so they don't typically deploy on the ground when you turn the airplane off.

Answer 4

An ADG is an Air Driven Generator or also refered to as RAT or Ram Air Turbine. In an all engine out scenario, the ADG deploys usually from the wing fairing or belly of the plane to provide limited Electrical and Hydraulic power. It's basically a fan that spins in the Air. Blades are most commonly made out of titanium. Some crop dusters also have an ADG to keep the pressure in there tanks up.

Shedding is when you are managing your electric loads after you have lost a generator. You turn off non essential items such as Galley power switches.

EDIT: Here's a picture. http://www.airliners.net/open.file/13154...