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#1
October 6th 05, 05:25 AM
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"Nick" wrote I would believe most owners (including myself) are more concerning with proper leaning, cold shock, and sloppy pilot landings & takeoffs. Those factors will bite into an owners & FBO's pocketbook. How does cooling shock show up, in a diagnostic/ overhaul/ shortening of engine life, if you know what I mean? What parts suffer, and how do you know other than tearing down the engine? (short of having it seize on you) I have my guesses, but am probably at least partially wrong, and possibly totally wrong. g -- Jim in NC 
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#2
October 7th 05, 02:44 PM
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Cooling shock is, IMHO, an overblown issue in normally aspirated airplanes.
Coming east over the mountains, I regularly descend from 13,000 to land at 5300 -- and my cylinders are still tight 500 hours over TBO. It's a plain vanilla O-540, severely understressed, and I baby it by running lower rpm most of the time. Seth Comanche N8100R "Morgans" wrote in message ... "Nick" wrote I would believe most owners (including myself) are more concerning with proper leaning, cold shock, and sloppy pilot landings & takeoffs. Those factors will bite into an owners & FBO's pocketbook. How does cooling shock show up, in a diagnostic/ overhaul/ shortening of engine life, if you know what I mean? What parts suffer, and how do you know other than tearing down the engine? (short of having it seize on you) I have my guesses, but am probably at least partially wrong, and possibly totally wrong. g -- Jim in NC
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#3
October 9th 05, 11:59 PM
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On Fri, 07 Oct 2005 06:44:27 -0700, Seth Masia wrote:
Cooling shock is, IMHO, an overblown issue in normally aspirated airplanes. Coming east over the mountains, I regularly descend from 13,000 to land at 5300 -- and my cylinders are still tight 500 hours over TBO. It's a plain vanilla O-540, severely understressed, and I baby it by running lower rpm most of the time. IIRC, Rod Machado also has the same sentiment about the subject. His take is if shock cooling was a major factor, twins used for training should constantly have a problem with once engine dying before the other....but as he sees it, most training twins see TBO or better for both engines. Greg
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