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The other kind of airfoil

'01/02/2010 - Valencia (ESP) - 33rd America’s Cup - BMW ORACLE Racing - Training in Valencia***01-02/2010 - Valencia (ESP) - 33rd America’s Cup - BMW ORACLE Racing - Training in Valencia'    BMW Oracle Racing © Photo Gilles Martin-Raget    Click Here to view large photo

Given the lovely weather that we’ve been 'enjoying' in Seattle as of late (read: liquid sunshine, and lots of it), my family and I spent the morning checking-out a different kind of wing than the America’s Cup variety, namely the ones that Boeing manufactures and assembles at their Everett, Washington facility. Here, we saw wing sections for 747s, 787s and 777s being assembled and attached to their fuselages in the world’s biggest building. I couldn’t help but smile when the tour guide referred to the supporting members that run internally down length of each wing as 'spars.'

01/10/2012, San Francisco (USA,CA), 34th America's Cup, ORACLE Team USA AC72 training  Gilles Martin-Raget: AmericasCup©   Click Here to view large photo

I also couldn't help but consider that the scale of an AC72’s wingsail won’t be too far afield from what I was seeing on the massive assembly floor. Even mightier was the thought that BMW Oracle 90 used a wing section that dwarfed that of any commercial airliner ever built.

Boeing 787 Dreamliner carbon fiber wings are similar in scale to the AC72 -    

In another parallel to Grand Prix sailing, the new 787 is built using substantial amount of carbon fiber and composite materials. Also according to our tour guide, the 787’s wings (which use a lot of carbon) are designed to flex more than 20 feet, purportedly to act as 'shock absorbers' (his parlance, not mine) to make flying through rough air a smoother experience. Yet talk to any skipper in the alone-and-around-the-world-nonstop Vendee Globe Race, and I strongly suspect that they wouldn’t think of their carbon-fiber racing shells as having much in the way of shock absorption, especially now as they skim and skip along the often storm-tossed Southern Ocean.

Francois Gabart, Macif - 2012 Vendee Globe -  Jean-Marie Liot - DPPI_- Vendée Globe ©  


by David Schmidt, Sail-World USA Editor

  

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12:05 AM Mon 17 Dec 2012GMT


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