lml@lancaironline.net Mailing List Archive

hi there

i would love to learn more about the stall strips. are there photos? is there any design data? drawings?

i asked Len Fox about stall strips and i did not get a clear answer such as you are giving. Well he is a test pilot and does write a concise report of conditions.

thanks for any leads or information that you might have

peter

To: lml@lancaironline.net
Date: Tue, 4 Jun 2013 16:05:46 -0400
From: 2thman1@gmail.com
Subject: [LML] Re: VORTEX GENERATORS ask the vender

Peter,

One additional thought. Mark Kirchner of Mercer Island, a Boeing engineer, designed stall strips years ago. He gave me my first lesson in composite work while he was building his Lancair. These strips have been thoroughly tested by Len Fox and others. They don't lower any of the critical speeds, but they do provide aileron control and more docile departures during a stall in this unforgiving beast. Mark passed away a few years ago but his idea was a good one and lots of IV's have safer performance because of it.

John

Sent from my iPad

On Jun 4, 2013, at 11:08 AM, John Barrett <2thman1@gmail.com> wrote:

Peter,

The web site does say all you are reporting except the fact that Len Fox has done some testing, I assume for you? Was that on a IVP?

They also don't identify themselves by name or credentials and I had not heard of them.

Thanks,
John

Sent from my iPad

On Jun 4, 2013, at 9:08 AM, PETER WILLIAMS <peterpawaviation@hotmail.com> wrote:

JOHN

len in his analytical way reported the reduction of stall speed (he did a before and after)

i was hoping that when we put the VG at 8% of chord we could improve aerolon authority at or near the stall. no such luck.

len had no negative thoughts, as far as i know, about the VGs

from my conversations with the supplier, they had done VG for certified airplanes prior to developing VGs for Lancairs.

call them, they are very forthcoming

peter

To: lml@lancaironline.net
Date: Tue, 4 Jun 2013 09:55:19 -0400
From: 2thman1@gmail.com
Subject: [LML] Re: VORTEX GENERATORS

Who are these people? Anybody know? Just curious. What do Len Fox and Dave Morss think of these things?

Seems like test pilot reports would be useful.

John Barrett

Sent from my iPad

On Jun 4, 2013, at 5:14 AM, Bruce Whitaker <brucewhitaker67877@yahoo.com> wrote:

Thanks,
Just ordered a set for my 235.
Great info.
Bruce

From: PETER WILLIAMS <peterpawaviation@hotmail.com>
To: lml@lancaironline.net
Sent: Tuesday, June 4, 2013 6:42 AM
Subject: [LML] VORTEX GENERATORS

HI THERE

here is the link for vortex generator kits for Lancair aircraft

http://www.pnwaero.com/Lancair.htm

i was very happy with the company and with the results

peter williams