X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 18 Jun 2008 09:36:40 -0400 Message-ID: X-Original-Return-Path: Received: from web55705.mail.re3.yahoo.com ([216.252.110.36] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with SMTP id 2972602 for lml@lancaironline.net; Tue, 17 Jun 2008 22:04:37 -0400 Received: (qmail 16558 invoked by uid 60001); 18 Jun 2008 02:04:38 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=QcY6uW3066pRbCOaHNo0gEl+NvCWwMdWehIdSvF57gh37mSQ/bcDIarjSXg7CLoaOA60KZn9NnSrGywnejSlWuFwM0b5/v2n+0by+8ACGkk50kkf/A4BmdpUh1hGr7DETbEQvRTH5JjGTjyrwmo2CQ6abaxrd4OJMfIZRfGpvgg=; Received: from [75.33.110.78] by web55705.mail.re3.yahoo.com via HTTP; Tue, 17 Jun 2008 19:04:38 PDT X-Mailer: YahooMailRC/975.45 YahooMailWebService/0.7.199 X-Original-Date: Tue, 17 Jun 2008 19:04:38 -0700 (PDT) From: J H Webb Subject: Re: [LML] Leading Edge Tape X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-569066715-1213754678=:16185" X-Original-Message-ID: <416519.16185.qm@web55705.mail.re3.yahoo.com> --0-569066715-1213754678=:16185 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Art, =0A=A0=0A=A0=A0 Due to leading edge erosion from IFR Operations, I app= lied the 3M tape developed for Helicopters in the Middle east. I was concer= ned about the possibility of two things, one increased stall speed and redu= ced cruise speed. First the tape (expensive but cheaper than paint touchups= ) stopped the erosion, then there was no noticeable change in stall speed o= r stall handling qualities. There appears to be about 1-2 knots loss=A0at a= bout 60% power. =A0=A0=A0 Rain at over 230 knots is like little nasty hamme= rs and even caused a small fuel leak in the leading edge which required rep= air and paint. The tape has stopped that problem. It is clear tape but over= time it=A0clouds slightly=0A=A0=A0=A0 I installed 3" 14 mill tape in 2004 = and have been very happy with the outcome. I purchased the tape from Brown = tape in Indianapolis, In 866 276 9682for $285 3" wide in 36 yard length.=A0= This tape was cut in two (1.5")=A0for the tail surfaces for proper coverage= . The width is excessive for the tail.=A0Prior to this I had tried other ta= pes which were not satisfactory but much less expensive.=0A=0AJ H Webb=0AL3= 60, LIV=0Ayears of low speed aerodynamics flight testing experience=0A=A0= =0A----- Original Message ----=0AFrom: Art Bertolina =0ATo: lml@lancaironline.net=0ASent: Tuesday, June 17, 2008 9:14:47 P= M=0ASubject: [LML] Leading Edge Tape=0A=0A=0AI have conflicting statement f= rom knowledgeable people=0Aregarding leading edge tape. Will leading edge t= ape =0Aincrease the stall speed of a L IV?.=0AArt=0A=0A=0A --0-569066715-1213754678=:16185 Content-Type: text/html; charset=us-ascii

Art,

Due to leading edge erosion from IFR Operations, I applied the 3M tape developed for Helicopters in the Middle east. I was concerned about the possibility of two things, one increased stall speed and reduced cruise speed. First the tape (expensive but cheaper than paint touchups) stopped the erosion, then there was no noticeable change in stall speed or stall handling qualities. There appears to be about 1-2 knots loss at about 60% power. Rain at over 230 knots is like little nasty hammers and even caused a small fuel leak in the leading edge which required repair and paint. The tape has stopped that problem. It is clear tape but over time it clouds slightly

I installed 3" 14 mill tape in 2004 and have been very happy with the outcome. I purchased the tape from Brown tape in Indianapolis, In 866 276 9682for $285 3" wide in 36 yard length. This tape was cut in two (1.5") for the tail surfaces for proper coverage. The width is excessive for the tail. Prior to this I had tried other tapes which were not satisfactory but much less expensive.

J H Webb

L360, LIV

years of low speed aerodynamics flight testing experience

----- Original Message ----
From: Art Bertolina <artbertolina@earthlink.net>
To: lml@lancaironline.net
Sent: Tuesday, June 17, 2008 9:14:47 PM
Subject: [LML] Leading Edge Tape

I have conflicting statement from knowledgeable people

regarding leading edge tape. Will leading edge tape

increase the stall speed of a L IV?.

Art

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