#wingmanadventures

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With the help of donations to the important work of Save The Children around the globe, more kids every day will get the love and care that is ours to give.

Q:  Flight Attendants are sometimes asked by our Pilots to relocate passengers in the aircraft cabin for weight and balance.  Not surprisingly, our passengers are often perplexed by the need to do so on large aircraft. Could you please explain what this is about and why it’s required?  Thanks!

A:  WingmanAdventrs: The request to re-position a passenger is borne of the need to have the plane in balance. Balance refers to the location of the center of gravity (CG) along the longitudinal axis of the aircraft (nose to tail). The CG is the point about which an aircraft would balance if it were possible to suspend it from that point. There are forward and aft limits established during certification flight testing; they are the extreme CG positions at which the longitudinal stability requirements can be met. Operation outside these limits means you would be flying in an area where the aircraft’s handling has not been investigated, or is unsatisfactory.

Great demo on how volcanic ash can damage a jet engine. 

Volcanic ash is very abrasive and can:

-Cause rapid erosion and damage to the internal components of the engine with a resultant loss of thrust.

-Cause excessive EGT (exhaust gas temperature--a common way of measuring engine performance) It may become necessary to shut down and then restart engines to prevent exceeding EGT limits. If an engine fails to start, repeated attempts should be made immediately. A successful engine start may not be possible until the aircraft is out of the volcanic ash and the airspeed and altitude are within the airstart envelope.

-Block the pitot system resulting in unreliable airspeed indications. 

-Cause all the windshields to become translucent, obstructing vision. On aircraft with autoland capability, a diversion to an airport where autolanding can be made should be considered.

Airlines watching volcanic activity in Iceland closely. You can track here: 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/

THE BAD NEWS

IS THAT TIME FLIES.

THE GOOD NEWS