RCU Forums - View Single Post - How important is the break in procedure?

06-05-2011 | 08:19 AM

#137

Sport_Pilot

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From: Acworth, GA

RE: How important is the break in procedure?

Quote:

ORIGINAL: Broken Wings

Quote:

ORIGINAL: DarZeelon

Quote:

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

It's a shame when facts get in the way of a good argument...

I apologize if I've upset you.

The lower temp for annealing is the temp that the process must cool through. The higher temp is the temperature the product must be at or near before the annealing procceswill begin. The slow annealing process for most brass is over 600 degrees and brass will not lose any hardness unless above 500 degrees.

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