I always assumed that nitriding gave you a thin hardened outer surface to slow wear, something like case hardening. I did not realize that it could help prevent breaks. Please elaborate on this when you give us your final results. I, and probably most of us, obviously don't know all there is to know about the process and would like to lean more.
Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Mark Langford Sent: Tuesday, June 28, 2005 11:32 PM To: KRnet Subject: Re: KR> Are leader mark L Flymaca wrote: > I hope are leader is not to bummed over his hub problem and all you guys > with covair parts are trying to get him back in the air . Thanks. I'm gettin' there. I haven't posted much to KRnet on this because I figure it's a Corvair problem, not a KR problem, but I can tell you that it's apparently real important to "clock your prop" so that it is vertical when the cylinder that is closest to the prop hub (forward most) is at TDC. It's a pretty big difference in bending stresses that the crank journal sees. We had this discussion a while back and it was mentioned to clock it perpendicular to #1, but that's apparently only if #1 is the cylinder closest to the prop. The jury is still out, to some extent, but I've had some expert help on this, and am sending the crank to the "ultimate" aircraft crank failure expert tomorrow for an even more in-depth analysis. I'm not sure I've posted this to KRnet before, but the usual excruciating details are at http://home.hiwaay.net/~langford/corvair/flexplate/problem.html . What passes for an answer is very close at hand. Just don't start a bunch of crazy speculation like what started on the CorvAircraft list. I couldn't take that all over again! I'm learning other things too (such as the importance of nitriding your crank) but I'll report on that shortly. Mine is going to the nitrider tomorrow. I'm up for some $150 insurance any time. Whatever it takes to keep from soloing a glider again. So far it looks as though the rear starter is not really the problem, but a "perfect storm" of other little problems that most people never think of, along with pushing the envelope a little, that all add up to be a "big" problem. More later, but right now I'm knee deep in building a new engine. I'll fly the plane to the Gathering for sure... Thanks for the kind words... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -------------------------------------------------------------- _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
