SWRFI '03: A Wingtip Is a Wingtip Is a Wingtip, Right? | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date






Airborne On ANN

Airborne 10.24.16

Airborne 10.25.16

Airborne 10.19.16

Airborne 10.20.16

Airborne 10.21.16

Airborne Hi-Def On YouTube

Airborne 10.24.16

Airborne 10.25.16

Airborne 10.19.16

Airborne 10.20.16

Airborne 10.21.16

Thu, May 22, 2003

SWRFI '03: A Wingtip Is a Wingtip Is a Wingtip, Right?

Not When It Is A Vorten Tip!

By ANN Correspondent Juan Jimenez

One of the things we like about the regional fly-ins is that there is always some cool product that doesn't make it to the larger shows. The SWRFI show was no exception, and this time we got a look at the Vorten Tip.

The Vorten Tip is a patented wingtip vortex attenuating device developed from a concept tested in the Purdue University wind tunnel. It was designed by Ed Johnstone of Johnstone Aero out of San Antonio, TX. We all know that a lifting surface always has an associated induced drag which produces a vortex that trails behind it. Student pilots are taught about wingtip vortices, and those of us who fly in and out of airports servicing larger aircraft hear about them from ATC all the time.

The Vorten Tip takes air into an inlet located at the highest pressure point  on the airfoil, forces that high energy air through an aerodynamically designed plenum chamber and extrudes it through a reduced-area opening at the trailing edge. If you are familiar with the design of the P-51 Mustang cooling air scoop, you know what happens at the exit point - the air leaves at a much higher velocity than when it came in. With the Vorten Tip, this effect modifies the "helix angle" associated with the vortex by stretching it out. This has the effect of reducing induced drag, which is of course "a good thing."

So what does this all mean? The way Mr. Johnstone explains it, the Vorten Tip, which can be adapted to just about any "Hershey Bar" style wing, improves climb and short field performance. It also improves cruise speed at higher altitudes. Flight testing has been performed so far on a modified Piper Cherokee PA28-140. The testing has documented a 100 FT/MIN increase in rate of climb. Continued testing is being performed in order to optimize the inlet and outlet configurations.

An application for an STC has already been filed with the FAA to install the Vorten Tip on Piper Cherokees, and STC's for other aircraft are planned once the first one is completed.

FMI: Ed Johnstone, (210) 496-3847, ehjjaco@aol.com


More News

Airborne 10.21.16: NIMBYs Out Of Control, SMO Evictions On Hold, New Race Class

Also: CVR/FDR Expansion, Focusing On Santa Monica, NASAO Boss, GE9X Engine, 1000th H-60M, Verizon Drones, New LAS ATC A Transportation Safety Board of Canada team is currently inve>[...]

Aero-News: Quote of the Day (10.24.16)

“We want to promote EAA, our passion for flight, and our mission of growing participation in aviation in way that’s fun and engaging. The Spirit of Aviation mobile mark>[...]

Aero-News: Quote of the Day (10.23.16)

Aero-News Quote of the Day "Think of this transition as changing an engine on a plane when it's inflight. Rolling out STARS in our nation's busiest airspaces, without disrupting ai>[...]

ANN's Daily Aero-Linx (10.24.16)

Aero Linx: The Canadian Aerospace Medicine and Aeromedical Transport Association CAMATA is the acronym for the Canadian Aerospace Medicine and Aeromedical Transport Association. It>[...]

ANN's Daily Aero-Linx (10.23.16)

Aero Linx: The Society of United States Air Force Flight Surgeons (SoUSAFFS) SoUSAFFS was established in 1960 to more specifically support the USAF FS than AsMA at large could. Sin>[...]

blog comments powered by Disqus





© 2007 - 2016 Web Development & Design by Pauli Systems, LC