wileydog3,
Just read your link about the Philips "Multiplane". Nice one, thanks!
Somehow, in a very roundabout way, his ideas seem to still be alive in todays jet engines....

You're welcome. What is interesting is the idea was proven before the Wright brothers took to the air. It took one of those 'eureka' moments decades later for the concepts to be actually put to use.

The first general aviation use for winglets was on the Lear Longhorns, the -27 and 28. They were designed as testbeds but demand for them caused Learjet to rethink their position and they did sell a few. Problem was they were short legged when it came to range.

There are many ways to treat the vortex and the raked wingtip is one. It is generally accepted that it is NOT the best treatment but it is one.

In the works now is a 'spiroid' It is a winglet that spirals up and is enclosed.

But for the real adventurer.. we have the Lockheed Ring Wing, a concept Lockheed looked at in the 80s. Of course, never built but you can see the -1011 lines in the artists concept. And no, this is not a photoshop creation. http://i9.photobucket.com/albums/a94...scan0003-1.jpg

Lockheed "Ring-Wing"
 

As a former L1011 F/E I am afraid WileyDog3's imagination is too good for me. Am unable to see any aspect of the "Ring-Wing" which bears any resemblance to the TriStar. :ugh:

Winglets?

These are winglets......:rolleyes:


http://i84.photobucket.com/albums/k3...viate/y5_1.jpg


Chinese Y-5 version of AN-2 [Saving my pennies to buy a Y-5]

http://www.mrprophead.com/Comercial/L1011_ViewL.jpg

I was referring to the cockpit windows, the nose section and forward fuselage. But no, not the engine mounting or the wings.

Winglets seem a good idear.

But do have some draw backs the older NG73's and 75's with winglets have noticed a reduction in life of the wing spar due to the extra flexing. Been told the problem has been addressed with the newer 73's but to what degree I am unsure,

Winglets saves money on fuel burn in the short turm but does it shrorten the life of the airframe?

Can now see what some airlines have not gone for this option.