---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Wed 03/15/06: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:59 PM - Re: AGING AIRCRAFT (Bill Bow) 2. 07:13 PM - Re: AGING AIRCRAFT (Chris Schuermann) ________________________________ Message 1 _____________________________________ Time: 06:59:31 PM PST US From: "Bill Bow" Subject: RE: Commander-List: AGING AIRCRAFT --> Commander-List message posted by: "Bill Bow" Well there is always hope, since Ted Smith also worked for Donald Douglas, that it could turn out to be like the DC-8. It turned out to be the only aircraft in the Aging Fleet Program that was found to have "No discernable life span". There is always hope. bilbo -----Original Message----- From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Chris Schuermann Sent: Monday, March 13, 2006 4:48 PM Subject: Re: Commander-List: AGING AIRCRAFT --> Commander-List message posted by: Chris Schuermann W J R HAMILTON wrote: > the 680Es bought by the old > Australian Department of Civil Aviation were all corrosion proofed > during manufacture That's an interesting bit of trivia that I was unaware of. Thanks! > We are also seeing VERY serious corrosion in some strutted Cessna I've seen some pretty serious corrosion here in the midwest lately on Cessnas as well. Cessna did virtually nothing for corrosion-proofing except on the few birds set up for float ops. Amazing how much corrosion I've seen inside the wings of Cessnas that have been hangared in Oklahoma their entire lives. Just condensation will do it. > the bigger Pipers seem to throw up fewer > unexpected horror stories. That's been my observation as well Bill. Piper did a pretty darn good job of slathering zinc chromate all over in many of their models. I havn't found any corossion at all in my '65 Aztruk even after a total tear-down restoration. Pitty that everybody didn't do the same. chris ________________________________ Message 2 _____________________________________ Time: 07:13:36 PM PST US From: Chris Schuermann Subject: Re: Commander-List: AGING AIRCRAFT --> Commander-List message posted by: Chris Schuermann Bill Bow wrote: > Well there is always hope, since Ted Smith also worked for Donald Douglas, > that it could turn out to be like the DC-8. It turned out to be the only > aircraft in the Aging Fleet Program that was found to have "No discernable > life span". I seem to recall being told that there was a fatigue life determination done on the Commander. I don't recall details of the results, but I do remember that no "issues" were found with the wing design. My personal speculation is that the tail surfaces would be one of the first places to show significant fatigue damage. Commanders have a pretty obvious propensity to develope cracks in the tail feathers. I imagine it is mostly due to prop beat since it seems to be far more prevelant on the big-engined models such as the 680F/FL. Maybe Jim or Barry knows more. Chris