All around us

I think about it a lot, but probably most people don’t.  It is all around us, it permeates our existence, it frustrates us, injures us, and kills us.  It is an invisible something that is almost absolutely inescapable, relentless, and uncaring.  It’s in the back of every engineer’s mind and always part of his equations, but it is so ubiquitous that it is rarely noticed or given its fair due.

Myself, and a few others—a small percentage of all the engineers out there—think about it all the time.

Gravity.

Not that we delve into the cause of it—Higg’s boson, dark energy, dark matter, or what have you—but rather the everyday impact of gravity, weight, and mass on engineering projects.  And what constantly amazes me is why it is always an afterthought for many engineers in many fields.  Every building, car, boat, plane, satellite, rocket, kite, chair, train, bus, elevator, and etcetera must be designed for weight or mass limitations, and managing the weight or mass properties properly helps ensure a successful design while managing it poorly, or not at all, often leads to complete failure.  The most common examples are with aircraft which are so sensitive to weight and centers of gravity, though there are many others in other areas:

  • The hovercraft that was too heavy to lift off the ground.
  • The plane that crashed because of too much aft weight.
  • The balcony that collapses from overcrowding.
  • The ferry that capsizes when passengers crowd to one side.
  • The building that collapses while under construction from insufficient temporary braces for the weight.
  • The airliner that can’t take the design load because it was built too heavy.
  • The car that can’t meet its mileage goal because it is too heavy.

The list goes on and on, with weight management, or lack of same, at the center of the problem.  Yet if I introduce myself as a weights engineer I usually get a, “what’s that?”.  You’re probably saying that right now.  And yet, just like gravity, a weights engineer touches every part of an engineering project, from start to finish.  Hers may be the ultimate  systems engineering discipline, and certainly the least known.  And, in many cases, it can be one of the most important.  Both to life and limb, and to cost.

And we still don’t get no respect.  I can live with that, but when there is no recognition at all is when I get frustrated.  With most of the Western world obsessed with their personal weight, how many times do they ask about the weight of the car they are buying, or if their overloaded suitcase will affect the plane they are boarding, or if the snow load on that building is anything to be concerned with, or if that ladder can support them?  Does anybody ever think that if they unloaded their trunk they would get better gas mileage?   Or does the engineer ever think that optimizing their design for weight would save money and increase safety?  Rarely, I think.

What’s my point?  Well, I guess just this:  Weight is worth thinking about.  Or maybe it is better said that not thinking about weight can be dangerous and costly.

What do you think?  Drop a comment below.  And if you’re interested in this topic, visit www.sawe.org for more information.

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Published in: on January 19, 2010 at 5:00 pm  Leave a Comment  

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