---------------------------------------------------------- RV6-List Digest Archive --- Total Messages Posted Thu 12/22/05: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:44 PM - Re: Vortex Generators (Howard Walrath) ________________________________ Message 1 _____________________________________ Time: 12:44:30 PM PST US From: "Howard Walrath" Subject: RV6-List: Re: Vortex Generators Subject: Re: Vortex Generators Jerry, I bought mine from Larry Vetterman (of exhaust system fame) who worked with several RV owners including RV-4's and RV-6's. He holds the rights to these and, as I recall, his price was about $400, including shipping. Installation took me about 3 hours, with die-cut templates and very good instructions. Net result was a 9 to 10 knot drop in my 200 HP RV-6A's power-on-stall speed, a much more docile stall, without the "which way is she going to tuck this time?" excitement attendant to Van's 23-foot wing span at very high angles of attack. My normal landing speed is now about 10-knots slower than pre-VG's. When I went through portions of Rich Stowell's Emergency Maneuvers/Recovery From Unusual Attitudes training in California, he remarked that my RV's stall/spin behavior was the best he'd ever experienced in an RV. If the VG's cost me anything in cruise, it is not discernible and less than 1 Knot -- as I compared before and after detailed cruise speeds at the same power settings on longer trips. I am a real believer in them. Howard > ----- Original Message ----- > From: > To: > Sent: Wednesday, December 21, 2005 12:30 PM > Subject: RV-List: Re: Vortex Generators > > >> --> RV-List message posted by: Jerry2DT@aol.com >> >> >> Hi Bob, >> >> Do you have any test data you could share with us? I've tried to >> find data >> in the past on VG's, but seems to be very little. >> >> Jerry Cochran >> Wilsonville, OR >> >> From: Oldsfolks@aol.com >> Subject: RV-List: >Re: Vortex Generators >> >> --> RV-List message posted by: Oldsfolks@aol.com >> >> The Micro systems Vortex generators is what I have on our RV-4. I >> got >> them >> from Larry Vetterman 605-745-5932 , the exhaust system man. >> Mine are aluminun,curved to wing contour and only 1/2 " tall. I >> love them >> for the lower stall speed and the stable handling at minimun >> speed. I lost >> nothing at top speed. I painted them to match my paint. >> >> >> Bob Olds RV-4 , N1191X >> A&P , EAA Tech. Counselor >> Charleston,Arkansas >> Real Aviators Fly Taildraggers >> >> >> >> >> >> >> >> >> >> >