X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 6.0.4) with ESMTP id 6185661 for lml@lancaironline.net; Sun, 07 Apr 2013 19:20:58 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=Qza2VR5qByLRuMIln+zM7M6pwlR5IMXP5MVpFRiLAvdSa1oY0IAF0gRddsYqN4EJ; 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 [72.92.131.242] (helo=[192.168.1.24]) by elasmtp-mealy.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1UOysr-0003At-5S for lml@lancaironline.net; Sun, 07 Apr 2013 19:20:25 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-268-522568802 Subject: Re: [LML] Re: Static Wicks Date: Sun, 7 Apr 2013 19:20:25 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: <76B08712-070B-4FA1-9B64-C90BCF05C808@earthlink.net> X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940c091def95242a65a0c93289e16c3fcec350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 72.92.131.242 --Apple-Mail-268-522568802 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Forgot to say - but hopefully it's obvious: the anti-static primer has = to get the charge all the way from the front facing part of the surface = to where you potted the bond wire, e.g. back edge of vstab. (If you = have an archer comm antenna in the vstab, I'm not sure how much worse = this will make it. I'm not a fan of that antenna anyway. the paint = works great on radomes....) On Apr 7, 2013, at 2:00 PM, Colyn Case wrote: I have limited to no knowledge but I'll tell you what I did: - anti-static paint primer (in other words conductive enough to move = charge) on any forward facing fiberglass surface - highly conductive epoxy used to attach a bond wire between any control = surface and the thing its hinged to. - static wicks on trailing edge of control surfaces electrically = connected to that bondwire (if glass surface) or the carbon itself. The charge accumulates near the front of the surface in question. So in = the case of your vstab, you need the anti-static paint to get it to = migrate back. and then you have to conduct it to the wick. If you search the archives you'll find the part number on the paint. = Desoto/PPG On Apr 7, 2013, at 11:02 AM, John Barrett wrote: This question has to do with the rudder in the IVP. It=92s written that = because the rudder is fiberglass, wicks aren=92t effective due to non = conductivity.=20 =20 A build shop installed wicks on my rudder and they ran ground wires to = those wicks from a/c ground. It seemed logical that this would make = them useful, but last night I had a discussion with Dan Newland who got = involved in static discharge problems on a satellite project in his = working days and he scratched his head at the notion. Said he wasn=92t = sure but would guess that the wicks are not going to be useful in that = configuration.=20 =20 Anyone on the LML have knowledge that bears on the subject? I would = like to learn more. =20 Thanks =20 John Barrett, CEO Leading Edge Composites PO Box 428 Port Hadlock, WA 98339 =20 www.carbinge.com =20 --Apple-Mail-268-522568802 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
I have limited to no knowledge = but I'll tell you what I did:

- anti-static = paint primer (in other words conductive enough to = move charge) on any forward facing fiberglass surface
- highly = conductive epoxy used to attach a bond wire between any control surface = and the thing its hinged to.
- static wicks on trailing edge = of control surfaces electrically connected to that bondwire (if glass = surface) or the carbon itself.

The charge = accumulates near the front of the surface in question. So in the case of = your vstab, you need the anti-static paint to get it to migrate back. =   and then you have to conduct it to the = wick.

If you search the archives you'll find = the part number on the paint.   = Desoto/PPG


On Apr 7, 2013, at = 11:02 AM, John Barrett wrote:

This question has to do with = the rudder in the IVP.  It=92s written that because the rudder is = fiberglass, wicks aren=92t effective due to non = conductivity. 
 
A build shop installed wicks on my rudder and they ran = ground wires to those wicks from a/c ground.  It seemed logical = that this would make them useful, but last night I had a discussion with = Dan Newland who got involved in static discharge problems on a satellite = project in his working days and he scratched his head at the = notion.  Said he wasn=92t sure but would guess that the wicks are = not going to be useful in that configuration. 
 
Anyone on the LML have = knowledge that bears on the subject?  I would like to learn = more.
 
 
John Barrett, CEO
Leading Edge = Composites
PO Box 428
Port Hadlock, WA 98339
 
 

= --Apple-Mail-268-522568802--