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Old 06-04-2011 | 07:14 AM
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DarZeelon
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From: Rosh-HaAyin, ISRAEL
Default RE: How important is the break in procedure?

ORIGINAL: Broken Wings

ORIGINAL: DarZeelon


ORIGINAL: PlaneKrazee

I always thought a heat cycle type break-in would stress relief parts and do a final microscopic polish of mating surfaces.
PK,


As I wrote earlier, the first part of your post; heat treating does not take place at the temperatures the parts of the engine attain during break-in. So it would not be wise to expect them to be stress-releaved to any degree.

The muutal polishing of the moving parts does happen; so sealing is optimized and friction minimized.
http://www.pmpco.com/annealing/annealing.html

http://www.riheattreating.com/heat-t...ecialties.html

http://www.tristateflame.com/annealing.htm

Do the temperatures in our engines not reach 300 degrees as you posted?

Here.. http://www.rcuniverse.com/forum/fb.asp?m=10551179
BW,


Let me first ask you one question... Is it or isn't it the objective of the break-in, to soften the high-silicon aluminium piston, or the chromium plated sleeve?

Since we both know the answer to this question, could you please stop wasting my time, by bringing up the issue of heat treating/annealing over and over again???


And yes; as I wrote, the temperatures of the metals in glow engines, do not often exceed 300°F, so no type of non-ferrous metal annealing takes place; not that it should.
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