X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-spurfowl.atl.sa.earthlink.net ([209.86.89.66] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6545652 for lml@lancaironline.net; Fri, 18 Oct 2013 08:47:11 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.66; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=Gi4vwexbCs+gIW39AcFrtRePfq0e6Sc11Ev9qkMLwVremrTd1o24eW4O00BROlAE; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [70.105.248.126] (helo=[192.168.1.24]) by elasmtp-spurfowl.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1VX9Rs-0002Au-Td for lml@lancaironline.net; Fri, 18 Oct 2013 08:46:37 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-346-66270201 Subject: Re: [LML] Yaw Date: Fri, 18 Oct 2013 08:46:35 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da94068debf37dbebd1fa27c24311a49636f7350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 70.105.248.126 --Apple-Mail-346-66270201 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii How do you execute the "oil drops" method? FWIW I ended up with a single strake on my IVP . (What I really wished for was a longer rudder but I didn't have the = engineering/flight test budget for that....) On Oct 18, 2013, at 7:56 AM, Gary Casey wrote: I certainly concur with the comments below. I installed them on my ES = after doing an A/B test. They increased the "feet-off-the-rudder-pedal" = stability by about 30%. I measured a drop in cruise speed of about 2 = knots. Painful, but I'm still glad I did it. There seemed to be no = difference in low speed pitch trim. And I agree that the alignment of = the strakes with the local airflow could be better. If I were doing it = again I would carefully evaluate the local airflow, probably with oil = drops, and take a wedge-shaped slice out between the strakes, most = likely toeing them out by maybe 5 degrees. That said, I have evaluated = the airflow with oil (eventually the engine blowby oil will reach the = strakes) and I don't see any real problem. Maybe I'm imagining a = problem when there isn't one. I was told by someone (professional test = pilot) who has flown all types of Lancairs that on a IVPT they are = "absolutely required," on a IV they are "essential" and on an ES they = are "nice." FWIW Gary Casey Bill, did you have the opportunity to do a before/after speed test relative to = =3D those strakes? I can vouch that they are very effective at improving yaw stability. =3D However if you look at them on the airplane one wonders if they are =3D lined up with the airflow at that point on the fuselage. Colyn On Oct 16, 2013, at 10:16 PM, William A. Hogarty wrote: Hello Dico: =3D20 As I recall, I ordered the strakes directly from Mike Custard about 10 =3D= years ago. They were the cheapest option I had ever purchased for my =3D plane (less than $ 300) and also the easiest to install. =3D20 I had just started the painting process on my plane, when I heard about = =3D the strakes, so I stopped painting and waited for the strakes to arrive. = =3D As I recall, it took about 2 days to install, start to paint. =3D20 I have some photos of the installation process, if you would like to see = =3D them. I don't have Mikes address or contact info, but Im sure the folks at lancair might. As you = =3D can tell, I am a real advocate of his product. =3D20 Keep up the photography. =3D20 Regards, Bill Hogarty --Apple-Mail-346-66270201 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii How = do you execute the "oil drops" method?

FWIW I ended = up with a single strake on my IVP .
(What I really wished for = was a longer rudder but I didn't have the engineering/flight test budget = for that....)

On Oct 18, 2013, at 7:56 AM, Gary = Casey wrote:

I certainly concur with the comments = below.  I installed them on my ES after doing an A/B test. =  They increased the "feet-off-the-rudder-pedal" stability by about = 30%.  I measured a drop in cruise speed of about 2 knots. =  Painful, but I'm still glad I did it.  There seemed to be no = difference in low speed pitch trim.  And I agree that the alignment = of the strakes with the local airflow could be better.  If I were = doing it again I would carefully evaluate the local airflow, probably = with oil drops, and take a wedge-shaped slice out between the strakes, = most likely toeing them out by maybe 5 degrees.  That said, I have = evaluated the airflow with oil (eventually the engine blowby oil will = reach the strakes) and I don't see any real problem.  Maybe I'm imagining a problem when there isn't one.  I was told by = someone (professional test pilot) who has flown all types of Lancairs = that on a IVPT they are "absolutely required," on a IV they are = "essential" and on an ES they are "nice."  FWIW
Gary = Casey

Bill,

did you have the opportunity to do a before/after speed test = relative to =3D
those = strakes?
I can vouch that they are = very effective at improving yaw stability.  =3D
However if you look at them on the airplane one = wonders if they are =3D
lined up with the airflow at that point on the = fuselage.

Colyn

On Oct 16, 2013, at 10:16 PM, William A. = Hogarty wrote:

Hello Dico:
=3D20
As I = recall, I ordered the strakes directly from Mike Custard about 10 = =3D
years ago.  They = were the cheapest option I had ever purchased for my =3D
plane (less than $ 300) and also the = easiest to install.
=3D20
I had = just started the painting process on my plane, when I heard about = =3D
the strakes, so I stopped = painting and waited for the strakes to arrive. =3D
As I recall, it took about 2 days to = install, start to paint.
=3D20
I have = some photos of the installation process, if you would like to see = =3D
them.  I don't have Mikes
address or contact info, but Im sure the folks at = lancair might.  As you =3D
can tell, I am a real advocate
of his product.
=3D20
Keep up the photography.
=3D20
Regards, Bill = Hogarty

= --Apple-Mail-346-66270201--