[AJD] Antique-johndeere Digest, Vol 46, Issue 5

[John Wilkens]

Too tired to do all the math on this but wondering if your 
calculations take into account that the pistons fire only every 
second rpm?   Interesting.  John W.


At 07:19 PM 02/06/2008, you wrote:
>Did a little math (not my strong suit, but bear with me) concerning 
>the intervals of firing impulses on a two-cylinder tractor.
>
>   Let's assume that it's a Model "A", running at it's full rated 
> load of 975 rpm.  That meant that the crankshaft is revolving 16.25 
> revolutions per second. Let's assume that we're starting at the 
> precise moment No. 1 cylinder has fired. No. 2 cylinder will then 
> fire .03076 seconds later, then there will be an intereval of .0923 
> seconds before No. 1 cylinder fires again. I'm sorry, but I cannot 
> see where such minute intervals in power impluses, especially 
> smoothed by a heavy flywheel, could possibly be harmful to a 
> belt-driven machine, especially with the belt itself acting as an 
> additional shock absorber.
>
>   I've just seen too much film of JD tractors smoothly running 
> threshing machines and other belt-driven machines to buy into that 
> nonsense that a two-cylinder tractor will damage them. Again, a 
> story perpetrated by the Binderoids, I think.
>
>Mitchell Daly <md31043 at msn.com> wrote:
>   You know Duane, I've got pictures of that D up on the 4 coke 
> bottles at Expo
>III. It was an amazing sight and there were a lot of nay sayers there.
>Seeing is believing!!
>
>Mitch Daly
>md31043 at msn.com
>
>
>
>
>
> >From: Duane Ledford
> >Reply-To: Antique John Deere mailing
> >list
> >To: Antique John Deere mailing
> >list
> >Subject: Re: [AJD] Antique-johndeere Digest, Vol 46, Issue 5
> >Date: Wed, 06 Feb 2008 18:47:11 -0500
> >
> >Have seen this demonstration done with a U/S D perched on four bottles.
> >Really
> >does draw a crowd. Have mentioned this to the naysayers and their answer
> >was that
> >sure, it is smooth at idle, but when it is under load is when the problems
> >begin.
> >Kind of "Don't confuse me with the facts, my mind is already made up." That
> >being
> >said, I don't think you could balance my great grandfather's U/S A on those
> >bottles
> >when it was belted to his hammermill. I barely remember him chopping feed
> >for his
> >chickens when I was there. The front on the tractor would bounce so hard
> >that the
> >radiator cap would come off. Doesn't matter anyway. If I get a chance to
> >work my
> >JD's, I'm going to do it, bearings be darned!
> >
> >On Wed Feb 6 17:01 , 'Frank' sent:
> >
> > >and some of you guys actually thought that because it was of two cylinder
> > >design it would mess up bearings? HA!
> > >
> > >
> > >Frank
> > >gremaux at midrivers.com
> > >----- Original Message -----
> > >From: Oldmillmac at aol.com>
> > >To: antique-johndeere at lists.antique-tractor.com>
> > >Sent: Wednesday, February 06, 2008 3:16 PM
> > >Subject: Re: [AJD] Antique-johndeere Digest, Vol 46, Issue 5
> > >
> > >
> > >>
> > >> _Click here: This Tractor Runs on Pepsi_
> > >> (http://members.tripod.com/mellidee/Pepsi.html)
> > >>
> > >> Dave
> > >>
> > >>
> > >>
> > >>
> > >> **************Biggest Grammy Award surprises of all time on AOL Music.
> > >> (http://music.aol.com/grammys/pictures/never-won-a-grammy\?
> >NCID=aolcmp003000000025
> > >> 48)
> > >>
> > >> _______________________________________________
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> > >>
> > >
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                    In the wide-open spaces of NE Oregon