Does boeing also have the "ground logic", as airbus has (so that the plane knows that it has landed)?

Question

Does boeing also have the "ground logic", as airbus has (so that the plane knows that it has landed)?

Answer 1

Jason is right.  Aircraft that employ systems to be operated on the ground only must incorporate this device.  Light production aircraft such as a Cessna 150 have no such requirement and therefore are certified without it.

Answer 2

Nope, Boeing figures the pilots are smart enough to figure out if the plane is on the ground!

Answer 3

I'd once worked on a product for Boeing that used the "In Air" boolean expression for the aircraft state logic. This variable was available from the 429 bus and is computed from some other subsystem. I am not aware of the exact inputs that sets the "In Air" to (In Air = TRUE means A/c is airborne and FALSE means on ground). Weight on Wheels, IAS or Groundspeed exceeding preset vaules were a few of the inputs for the In Air/On Ground logic.

It doesnt matter who the manufacturer is, the ground logic is very important for aerospace applications.

Answer 4

Yes.

This "ground logic" lets the aircraft know when it is on the ground for many things such as spoiler deploying, auto-land/auto-brakes, anti-skid, electrical bus load-shedding, ADG deployment, and a whole host of other things.

The aircraft magnets located throughout the airframe in various places to sense whether or not the weight of the aircraft is compressed onto the landing gear.  This is referred to as Weight-on-Wheels or WoW logic.  Let the fanbois rejoice.

Answer 5

Every plane should have that, it wouldn't be certified air worthy by the FAA/ EASA if it didn't.

Answer 6

Most airplanes have some system of electronic or mechanical circuits and switches that activate or lock out specific functions when the airplane is on the ground...  For example, airplanes with retractable landing gear have "squat" switches that won't allow the gear to be retracted while the airplane is on the ground;  Some have speed brakes that automatically deploy on landing to help slow the airplane down on the runway;  Some airplanes have nosewheel steering systems that only function when the weight of the airplane is resting on the nose gear.