From: krnet-bounces@mylist.net To: John Bouyea Subject: KRnet Digest, Vol 347, Issue 194 Date: 5/13/2005 9:00:21 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. RE: Sanding and painting the WAFs (Brian Kraut) 2. RE: engines/Bendix Mag (Brian Kraut) 3. RE: engines/Bendix Mag (Steve Bray) ---------------------------------------------------------------------- Message: 1 Date: Fri, 13 May 2005 23:00:02 -0400 From: "Brian Kraut" Subject: RE: KR> Sanding and painting the WAFs To: "KRnet" Message-ID: Content-Type: text/plain; charset="windows-1250" I did a lot of research a while back on cadmium plating 4130. A very knowledegable mil spec plater told me that weather you need to bake them to relieve hydrogen embrittlement or not depends on the hardness of the steel. At the standard hardness of 4130 normalized steel he said it most definitely did need to be baked after plating. He told me how much and I believe it was somewhere around 400 degrees for six hours(don't take this as accurate). Anyway, the point of this is do not have your local Harley chrome plater that knows nothing about plating high stress aircraft parts plate your attach fittings. You can find a good mil spec plating shop that can do it correctly for probably the same price. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-bounces@mylist.net [mailto:krnet-bounces@mylist.net]On Behalf Of Mark Langford Sent: Friday, May 13, 2005 3:37 PM To: KRnet Subject: Re: KR> Sanding and painting the WAFs I can tell you for sure that zinc chromate will flake right off the first time the wings are installed. Mine used to be zinc chromated, but it's hard to tell that now! Best thing is to have them plated somehow, like RR does. Hydrogen embrittlement may be a concern though, so check for compatibilty with 4130 first. Here's something I found in a quick search of the web: "One comment is by a guy who overdrilled a spar bolt hole, and then did a D-I-Y plating job on the bolt to bring it back up to size: >Here's what worked for me: I contacted Caswell Plating (www.caswellplating.com) and bought an 8oz. bottle of their CopyChrome nickel plating solution. Following their directions, I plated the bolt up to 0.377" then baked it at 400° F for 4 hours to take care of any hydrogen embrittlement. It worked great. I also plated some 4130 scraps and was pleased with their appearance. The plating looked like it should be pretty durable. I even soaked a 4130 piece in saltwater overnight and saw no effect. It's not quite chrome, but it looks pretty good. " Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -------------------------------------------------------------- ------------------------------ Message: 2 Date: Fri, 13 May 2005 23:12:47 -0400 From: "Brian Kraut" Subject: RE: KR> engines/Bendix Mag To: "KRnet" Message-ID: Content-Type: text/plain; charset="us-ascii" Right here: http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/MainFrame ?OpenFrameSet&CFID=1889851&CFTOKEN=20037921 If that link does not work go to www.faa.gov and on the pulldown bar near the top right that says quick find click on Airworthiness Directives. It is a funny thing, on certified parts we have A.D.s that come out that we have to comply with to be legal. On non-certified parts we have no idea when there is a problem found that would have required an A.D. so we can not comply and we are legal. I do recommend that everyone checks the A.D.s for their mags and other certified parts weather you care about being legal or not. Better to know and decide if you want to comply than just keep your eyes shut. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-bounces@mylist.net [mailto:krnet-bounces@mylist.net]On Behalf Of Steve Bray Sent: Friday, May 13, 2005 9:57 PM To: krnet@mylist.net Subject: RE: KR> engines/Bendix Mag Hello I have a new/ twenty year old Bendix on a same age Revmaster. Where do I find out about the AD? > > >Here's where it gets into some of the nits that people will > >undoubtedly want to pick. If you are using a certified part, the ADs > >apply. For instance, many of the dual ignition revmaster engines use > >the Bendix single drive dual magneto. If that magneto is the same > >part number as >the > >ones on a certified engine, or the serial number falls into the range > >of serial numbers for that type for which an AD has been issued, that > >AD >also > >applies to that magneto on the Revmaster engine. > > Steve Bray Jackson, Tennessee _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net please see other KRnet info at http://www.krnet.org/info.html ------------------------------ Message: 3 Date: Fri, 13 May 2005 22:28:36 -0500 From: "Steve Bray" Subject: RE: KR> engines/Bendix Mag To: krnet@mylist.net Message-ID: Content-Type: text/plain; format=flowed Thanks Brian Steve Bray Jackson, Tennessee >From: "Brian Kraut" >Reply-To: KRnet >To: "KRnet" >Subject: RE: KR> engines/Bendix Mag >Date: Fri, 13 May 2005 23:12:47 -0400 > >Right here: >http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/Main >Frame >?OpenFrameSet&CFID=1889851&CFTOKEN=20037921 > >If that link does not work go to www.faa.gov and on the pulldown bar >near the top right that says quick find click on Airworthiness >Directives. > >It is a funny thing, on certified parts we have A.D.s that come out >that we have to comply with to be legal. On non-certified parts we >have no idea when there is a problem found that would have required an >A.D. so we can not comply and we are legal. > >I do recommend that everyone checks the A.D.s for their mags and other >certified parts weather you care about being legal or not. Better to >know and decide if you want to comply than just keep your eyes shut. > >Brian Kraut >Engineering Alternatives, Inc. >www.engalt.com > >-----Original Message----- >From: krnet-bounces@mylist.net [mailto:krnet-bounces@mylist.net]On >Behalf Of Steve Bray >Sent: Friday, May 13, 2005 9:57 PM >To: krnet@mylist.net >Subject: RE: KR> engines/Bendix Mag > > >Hello >I have a new/ twenty year old Bendix on a same age Revmaster. Where do >I find out about the AD? > > > > >Here's where it gets into some of the nits that people will > > >undoubtedly want to pick. If you are using a certified part, the > > >ADs apply. For instance, many of the dual ignition revmaster > > >engines use the Bendix single drive dual magneto. If that magneto > > >is the same part number as > >the > > >ones on a certified engine, or the serial number falls into the > > >range >of > > >serial numbers for that type for which an AD has been issued, that > > >AD > >also > > >applies to that magneto on the Revmaster engine. > > > >Steve Bray >Jackson, Tennessee > > > >_______________________________________ >Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net >please see other KRnet info at http://www.krnet.org/info.html > > > >_______________________________________ >Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net >please see other KRnet info at http://www.krnet.org/info.html ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 347, Issue 194 *************************************** ================================== ABC Amber Outlook Converter v4.20 Trial version ==================================