On Apr 7, 2008, at 4:51 PM, Mark Roberts wrote: > As I understand it, my friend's problem *was* with the side loads. I > don't know the details but he's a very experienced and talented engine > builder (4 national championships, two with the Ducati) and I trust > his > word on it.
I'll take your word for it. But in my experience with these engines and several engine builders, the usual cause of primary drive failure was fatiguing of the gears due to materials failure (the hard-face of the gears wore through, exposing the soft material underneath or the gears cracked), nothing to do with side loads (which would typically be demonstrated through failures of the main bearings due to side load stresses, not the primary gears). Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
