Turbine blade tips.
By cr8zy1van, Section Wind Posted on Wed Jul 27th, 2005 at 05:48:54 PM MST
(not hints) physical tips.

When I was younger my granddad owned a Cessna, and I remember them taking it to a shop at great expense to have a kit installed on the wings that would allow for shorter take off/landings. I remember that the tips were curved slightly downwards, and they explained to me at the time that it helps keep more air under the wing to cause more lift. Every turbine blade tutorial/picture/post/website shows pretty basic tips on ends. Would something like a lip cause more lift/efficiency? I could not find the exact kit they had but did find this interesting picture... Has anyone spent any time looking into this or something similar?

Turbine blade tips. | 7 comments (7 topical, 0 editorial)

Vortex killers (3.00 / 0) (#1) by wdyasq on Wed Jul 27th, 2005 at 12:21:50 PM MST (User Info)

http://www.gregorie.demon.co.uk/freeflight/itdg/turbine_refs.html has been covered many times.... Ron Adventure is just bad planning." -- Roald Amundsen

Re: Vortex killers (3.00 / 0) (#2) by niffa (fillets@clear.net.nz) on Wed Jul 27th, 2005 at 01:41:03 PM MST (User Info)

Excellent link thanks You seem to be the site oracle, has the idea of using a ducted fan arrangement to enable higher tip speeds with less noise and vortex losses been discussed. I got no hits from a site search. Experimentation is the mother of all invention and the father of most cock-ups. [ Parent ]

Re: Vortex killers (3.00 / 0) (#3) by cr8zy1van (salsa117@hotmail.com) on Wed Jul 27th, 2005 at 02:32:03 PM MST (User Info)

Thank you for the link, it helped a lot. It would appear that the right tip can significantly increase performance. Now I just have to figgure out what im going to make it out of, and how to duplicate. [ Parent ]

induced drag (3.00 / 0) (#4) by rotornuts on Wed Jul 27th, 2005 at 11:35:51 PM MST (User Info)

Here's a photo I've always liked that illustrates the tip vortex. The size of the vortex is exagerated because the plane is flying at a very low altitude, well within "ground effect". Also see the link below for more good info http://142.26.194.131/aerodynamics1/drag/Page6.html Mike.

Re: induced drag (3.00 / 0) (#5) by ghurd on Thu Jul 28th, 2005 at 12:50:18 AM MST (User Info)

It is just crazy you would even have a photo like that, let alone always liked it!  :) G- [ Parent ]

Re: induced drag (3.00 / 0) (#6) by Warrior on Thu Jul 28th, 2005 at 05:31:22 AM MST (User Info)

That picture is from Popular Science magazine!!! I have the issue and they were analyzing the posibility of wing tip turbines able to use the energy these vortex create. The turbines were either going to drive hydraulic pumps or electric gennys :) Warrior Warrior__ "Why can't Murphy's Law be used to my advantage??" [ Parent ]

Re: induced drag (3.00 / 0) (#7) by finnsawyer on Fri Jul 29th, 2005 at 09:53:32 AM MST (User Info)

O.K. So where's the similar picture showing the effect of adding winglets.  Why do they always do half the job? GeoM [ Parent ]

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