Current Events — HabitableZone

Current Events » in reply to Or was vibrating...

Like I wrote yesterday, ...

the early days of almost every airliner crash reveal mysteries and conflicting accounts.

There are two primary types of turbulence generated by a heavy plane. The first type is turbulence from the engines and the other is wingtip vortices. The wake turbulence generated by a 747 is incredibly powerful. Each engine is producing over 40,000 pounds of thrust at takeoff. That's a lot of power.

Wingtip vortices can be very powerful as well, with the strength increasing with aircraft weight and during takeoffs and landings. Essentially, a wingtip vortex is like a horizontal tornado coming off of each wingtip rotating towards the fuselage. Vortices can linger for some time after takeoff. They normally descend below the plane's flight path spread horizontally. I remember an airshow pilot back in the 1980s who did an excellent demonstration of the power of vortices. He had smoke generators mounted on the wingtips of his plane, a WWII Hawker Sea Fury. That's a small plane compared to an airliner but the vortices lingered for a minute or more. Those coming off of a 747 would be much more powerful and could linger for a longer time.

It's possible that the Airbus flew through either the wake turbulence or a vortex. Of the two, I suspect a vortex would be more dangerous. If it did hit a vortex, it's possible that the vertical stabilizer was overstressed and ripped from the plane, rendering the plane uncontrollable and leading to the breakup. It'd be a freak accident for sure but it is possible, especially if there was some corrosion or other problem at the attach points. You're right, it couldn't happen at a worse time for the airline industry.

I'm not trying to say that sabotage or terrorism wasn't responsible for the crash. All I'm trying to do is come up with a rational explaination that fits with the known evidence. To date, no evidence that I've seen indicates something other than "natural" causes.

Log in or register to post.

The whole thread (9 posts)