Well you do recall correctly that the question was on the exam. I dont know what the <<correct>> answer was. But the question was removed largely because of the kinds of pros and cons you and I just ping ponged back and forth. There seems to be valid enough reasoning in either direction. Grin... our buisnessin a nutshell eh ?? RicB David Love wrote: >I do recall that when I took the written exam for the RPT this question was >asked and the correct answer was that the nap should run in the direction >of the jack return. Perhaps this question should be reviewed (though I >believe I did give the correct answer, at least according to the test--can >I say that?) > >David Love >davidlovepianos@earthlink.net > > > > >>[Original Message] >>From: Richard Brekne <Richard.Brekne@grieg.uib.no> >>To: <davidlovepianos@earthlink.net>; Pianotech <pianotech@ptg.org> >>Date: 3/26/2004 1:57:40 AM >>Subject: Re: knuckle orientation >> >>David Love wrote: >> >> >> >>>On the contrary, the nap is traditionally put in the opposite direction >>> >>> >so > > >>>that the jack will not encounter resistance when trying to return to the >>>"ready" position. >>> >>>David Love >>>davidlovepianos@earthlink.net >>> >>> >>> >>> >>> >>> >>Ah... :)... but there is no point to that as the weight of the hammer is >>not bearing down on the jack during the return. Indeed with proper >>regulated rep spring and jack there should be so nearly no contact >>between the jack and roller that the direction of the nap should be a >>moot question in that regard. Derimot, when the key is pressed and the >>whippen bears upwards on the knuckle, the degree of contact between the >>jack top and knuckle is at its greatest, and the jack scraping against >>the nap is not only uncomfortable but contributes to unnecessary noise >>and sluggishness as well. >> >>Nap Forward ! :) >> >>Course there is always the matter of the whip rep lever top and knuckle >>contact..... >> >>RicB >> >>just for the record... last time this came up I took the other >>position. Just for the sake of argument yer understands. >> >> >> >> >>>>[Original Message] >>>>From: Richard Brekne <Richard.Brekne@grieg.uib.no> >>>>To: Pianotech <pianotech@ptg.org> >>>>Date: 3/25/2004 12:11:38 PM >>>>Subject: Re: knuckle orientation >>>> >>>>Roger Jolly wrote: >>>> >>>> >>>> >>>> >>>> >>>>>Hi Dave, >>>>> I am chuckling out loud. The debate will start and >>>>>some will get passionate about it. >>>>>Global manufacturing will favor the nap as you have described, but try >>>>>and get a rational reason out of the action makers. <G> >>>>> >>>>>Regards Roger >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>Come on guys... EVERYBODY KNOWS that the grain should yeild least >>>>resistance under most stress... ergo the nap goes in the same direction >>>>as the properly regulated jack during the downstroke. >>>> >>>>Shesssh.... :) >>>> >>>>RicB >>>> >>>> >>>> >>>> >>>> >>>>> >>>>> >>>>> >>>>> >>>>>> I personally don't think it makes a dang bit of difference >>>>>>because the >>>>>>"grain" on most knuckles isn't all that pronounced. Even when trying >>>>>>to rub >>>>>>it both ways to see which way it lies, it's sometimes difficult to >>>>>> >>>>>> >>>>>> >>>>>> >>>tell. >>> >>> >>> >>> >>>>>> However, for consistency, you should install them all the same way >>>>>>(sometimes holding in the light just right and rubbing the leather >>>>>>this way >>>>>>and that will show you which way the nap lies). >>>>>> I just now went out to the shop and checked different makes of >>>>>> >>>>>> >>>>>> >>>>>> >>>grand >>> >>> >>> >>> >>>>>>shanks and two upright butts. They all favored let-off, i.e., the >>>>>>nap lies >>>>>>in the direction the jack travels when letting off. >>>>>> --David Nereson, RPT >>>>>> >>>>>> >>>>>>_______________________________________________ >>>>>>pianotech list info: https://www.moypiano.com/resources/#archives >>>>>> >>>>>> >>>>>> >>>>>> >>>>_______________________________________________ >>>>pianotech list info: https://www.moypiano.com/resources/#archives >>>> >>>> >>>> >>>> >>> >>>_______________________________________________ >>>pianotech list info: https://www.moypiano.com/resources/#archives >>> >>> >>> >>> >>> > > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >
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