Mailing List flyrotary@lancaironline.net Message #49209
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Re: No start
Date: Wed, 25 Nov 2009 10:05:16 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Dave wrote:

Or the pan bolts that run through and are coated with paint, sealant, contacting an anodized plate, etc...

An anodized plate is probably a bad idea.  Anodizing oxidizes the surface layer of the aluminum, converting it to a brittle ceramic.  The unavoidable vibrations in the base material will create microscopic cracks that creates stress risers that can then propagate.  I was skeptical when I first heard this, but then was presented with evidence that demonstrated a 20% decrease in reliability with anodized aluminum components.

I had my bed plate, PSRU mount plate and several other components nickel plated.  As a bonus, the bright nickel finish looks like chrome. 8*)
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster