X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 09 Jan 2013 06:56:50 -0500 Message-ID: X-Original-Return-Path: Received: from mail-pb0-f50.google.com ([209.85.160.50] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6001813 for lml@lancaironline.net; Tue, 08 Jan 2013 19:26:16 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.160.50; envelope-from=billhogarty@gmail.com Received: by mail-pb0-f50.google.com with SMTP id wz7so568173pbc.23 for ; Tue, 08 Jan 2013 16:25:40 -0800 (PST) X-Received: by 10.66.72.198 with SMTP id f6mr183574576pav.42.1357691140567; Tue, 08 Jan 2013 16:25:40 -0800 (PST) X-Original-Return-Path: Received: from [192.168.5.210] (ip-64-134-236-248.public.wayport.net. [64.134.236.248]) by mx.google.com with ESMTPS id o5sm41626638pay.5.2013.01.08.16.25.37 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 08 Jan 2013 16:25:39 -0800 (PST) Subject: Re: [LML] static discharge References: From: Bill Hogarty Content-Type: multipart/alternative; boundary=Apple-Mail-2C2EF1F2-F6E9-4994-B2D5-6DEB6DA8A858 X-Mailer: iPad Mail (9B206) In-Reply-To: X-Original-Message-Id: X-Original-Date: Tue, 8 Jan 2013 16:25:36 -0800 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-2C2EF1F2-F6E9-4994-B2D5-6DEB6DA8A858 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Ralf If I'm not mistaken Lancair calls for six static wicks on the IV, each attac= hed with the special=20 conductive cement directly to the prepared carbon. Also, each separate (mov= able) surface should be positively bonded to the plane. I use the gear box,= the engine, neg battery post, and also one additional ground bus for all th= e stuff aft of the pressure bulkhead. BTW, remember that the special conduc= tive cement from Lancair has a VERY short shelf life (don't ask) I also added the 4 inch wide protective clear tape to the leading edges (win= gs, vertical, horizontal and winglets). My point is that the leading edges look great after 10 years= . Disclaimer: I only have 200 hours on the plane. That might affect the r= esults.....maybe. One last point....On several occasions I have found the wick loose in its ho= lder where it was not making positive contact with the metal of the holder, t= herefore not affording any protection. Good item for the preflight. Good luck with your problem Bill H. On Jan 7, 2013, at 10:26 AM, wrote: > Dear subscribers, > =20 > In 2011 I saw some static discharge with missing paint nicks on the leadin= g edge of my wings when flying in the clouds. I added the Lancair static wic= ks (2 on each aileron and 2 on each side of the horizontal stab). When I ins= talled them I used the metal bands to connect everything together and get a g= ood electrical connection back to the engine/ground. I thought the problem w= as resolved. > =20 > On Dec 25th I flew the plane from cold Ohio to Orlando. There was a lot of= weather coming up from the south-west and I had to go out to the east coast= to get around the worst part. The usual under 3 hrs flight took me 3.5 hrs o= n this day. At least 2.5 hrs during the flight I was IMC (in the clouds, som= ewhat between unidentified layers, light rain etc.) I started out at 17.000 a= nd had to decent half way into the flight to 11.000 because of too much ice o= n the wings. There were airplanes at FL250 this day still IMC. > =20 > Below the freezing level in IMC I saw again some sparks off my leading edg= e. Down in Orlando the wing did not feel charged when I touched it. I had so= me minor paint damage on the leading edges again. On the way home I was agai= n for about 45 min IMC below the freezing level =E2=80=93 I did not see any s= parks but the wing felt charged after landing. I found some more paint damag= e. > =20 > When I checked the electrical connection first I did not get a signal from= the wicks to the engine. After I cleaned up the aluminum of the wick on the= outside I had the signal back to the engine. On one little paint damage hol= e where I was able to see the carbon I tried to get a signal back to the eng= ine and I did not get a signal ( I did not want to dig deeper or grind of pa= int so I left it alone). > =20 > I have some safety wire corkscrewed around my wicks and they are covered w= ith heat shrink tubing (to keep them from vibrating in flight) > =20 > I got silver metallic paint with clear coat on top. I did not use conducti= ve primer. To fix the little holes I put clear coat in the little holes and w= et sanded the leading edge again (I can still see the little holes but at le= ast I cannot feel them any more =E2=80=93 assuming the air flowing over it i= s blind anyway=E2=80=A6.) =20 > =20 > Question: did I miss something? Is there maintenance required on the wicks= ? Or are there just situations where you can=E2=80=99t help it and you get s= tatic discharge? =20 > =20 > Thanks for your help > =20 > =20 > Ralf > =20 > =20 --Apple-Mail-2C2EF1F2-F6E9-4994-B2D5-6DEB6DA8A858 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Ralf

<= div>If I'm not mistaken Lancair calls for six static wicks on the IV, each a= ttached with the special 
conductive cement directly to the p= repared carbon.  Also, each separate (movable) surface should be positi= vely bonded to the plane.  I use the gear box, the engine, neg battery p= ost, and also one additional ground bus for all the stuff aft of the pressur= e bulkhead.  BTW, remember that the special conductive cement from Lanc= air has a VERY short shelf life (don't ask)

I also a= dded the 4 inch wide protective clear tape to the leading edges (wings, &nbs= p;vertical, horizontal
and winglets).  My point is that the leading e= dges look great after 10 years.  Disclaimer:  I only have 200 hour= s on the plane.  That might affect the results.....maybe.
One last point....On several occasions I have found the wick loose in i= ts holder where it was not making positive contact with the metal of the hol= der, therefore not affording any protection.  Good item for the preflig= ht.

Good luck with your problem
Bill H.



<= br>

On Jan 7, 2013, at 10:26 AM, <bronnenmeier@GROBSYSTEMS.COM> wrote:

Dear subscribers,

 <= /o:p>

In 2011 I saw some static discharge with mis= sing paint nicks on the leading edge of my wings when flying in the clouds. I= added the Lancair static wicks (2 on each aileron and 2 on each side of the= horizontal stab). When I installed them I used the metal bands to connect e= verything together and get a good electrical connection back to the engine/g= round. I thought the problem was resolved.

 

On Dec 25th I f= lew the plane from cold Ohio to Orlando. There was a lot of weather coming u= p from the south-west and I had to go out to the east coast to get around th= e worst part. The usual under 3 hrs flight took me 3.5 hrs on this day. At l= east 2.5 hrs during the flight I was IMC (in the clouds, somewhat between un= identified layers, light rain etc.) I started out at 17.000 and had to decen= t half way into the flight to 11.000 because of too much ice on the wings. T= here were airplanes at FL250 this day still IMC.

 

Below the freezing lev= el in IMC I saw again some sparks off my leading edge. Down in Orlando the w= ing did not feel charged when I touched it. I had some minor paint damage on= the leading edges again. On the way home I was again for about 45 min IMC b= elow the freezing level =E2=80=93 I did not see any sparks but the wing felt= charged after landing. I found some more paint damage.

 

When I checked t= he electrical connection first I did not get a signal from the wicks to the e= ngine. After I cleaned up the aluminum of the wick on the outside I had the s= ignal back to the engine. On one little paint damage hole where I was able t= o see the carbon I tried to get a signal back to the engine and I did not ge= t a signal ( I did not want to dig deeper or grind of paint so I left it alo= ne).

 

I have some safety wire corkscrewed around my wicks and they are c= overed with heat shrink tubing (to keep them from vibrating in flight)<= /o:p>

 

= I got silver metallic paint with clear coat on top. I did not use conductive= primer. To fix the little holes I put clear coat in the little holes and we= t sanded the leading edge again (I can still see the little holes but at lea= st I cannot feel them any more =E2=80=93 assuming the air flowing over it is= blind anyway=E2=80=A6.)  

&n= bsp;

Question: did I miss something? Is ther= e maintenance required on the wicks? Or are there just situations where you c= an=E2=80=99t help it and you get static discharge?  

 

Thanks for yo= ur help

 

 

<= span style=3D"font-size:10.0pt;font-family:"Verdana","sans-se= rif"">Ralf

 

 

= --Apple-Mail-2C2EF1F2-F6E9-4994-B2D5-6DEB6DA8A858--