What plane is this? Maybe Azul airlines? [Atlas Air 747]

Ian Simpson

New Member
I missed this. What is this about then? That is certainly an Atlas Air flight. Are we referring to the MA370 debacle by any chance?
 

M Bornong

Senior Member.

WeedWhacker

Senior Member
Are we referring to the MA370 debacle by any chance?

Not a chance. The Opening Post was in reference to an obvious four-engine airliner...in this case, a B747.

The B777 (MH370) only has two engines.

Another (two) current production airliners that have 4 engines are the Airbus A340 and A380. A new Airbus design is about to be introduced, the A350, but it is another twin engine jet.


The ([...]) reference to "four canisters under the plane" appears to be a simple misconception about the engine nacelles....OR perhaps the fact that at least four prominent fairings on the underside of the wings (not symmetrically illuminated, BTW) are highlighted by the Sun's angle of illumination at the time the photo was taken.

Those are termed often Flap Track Fairings, or "canoes" (based on their shape). These are to smooth airflow over the mechanisms responsible for extending the Trailing Edge Flaps.

This shows the TE Flaps on a typical B747 extended, for a landing:

BA747.jpg


The fairings ("canoes") are clearly visible.

(**) [...]
 
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Scrappy_D

New Member
Those are termed often Flap Track Fairings, or "canoes" (based on their shape). These are to smooth airflow over the mechanisms responsible for extending the Trailing Edge Flaps.
They are also often sized to provide transonic area ruling, reducing wave drag.

http://en.wikipedia.org/wiki/Anti-shock_body

Most jet airliners have a cruising speed between Mach 0.8 and 0.85. For aircraft operating in the transonic regime (Mach 0.8-1.0), wave drag can be minimized by having a cross-sectional area which changes smoothly along the length of the aircraft. This is known as the area rule, and is the operating principle behind the design of anti-shock bodies. Reducing wave drag improves fuel economy.
Content from External Source
http://www.aerospaceweb.org/question/aerodynamics/q0240.shtml
 
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