[AT] How can they farm like that

[Ken Knierim]

My machinist is a mechanic on a sand dragster that holds the 2013 1/8 mile
top speed record on sand at Yuma (under 2.4 seconds to 160+ MPH). This year
they seem to be going for more slippage than ever as it's basically a sand
jet for forward thrust.

I guess it kinda depends on what you're trying to do. Acceleration of the
vehicle is one thing. Dragging a load is different. :)

Ken in AZ

On Sun, Nov 22, 2015 at 4:30 PM, Cecil R Bearden <crbearden at copper.net>
wrote:

> The way I understood the slippage was explained by an Ag engineering
> professor of mine.  He said the 15% slippage was needed to stack up the
> soil behind the lugs to support the thrust of the tire lug.
>
> Cecil in OKla
>
>
> On 11/22/2015 4:05 PM, charlie hill wrote:
> > Certainly an interesting subject Dean.
> > I'm sure the pullers study it long and hard.
> >
> > Charlie
> >
> > -----Original Message-----
> > From: Dean VP
> > Sent: Sunday, November 22, 2015 3:55 PM
> > To: 'Antique tractor email discussion group'
> > Subject: Re: [AT] How can they farm like that
> >
> > Charlie,
> >
> > It wasn't too long ago that I read an article about the required optimum
> > slippage to get the most HP
> > to the ground. That was really interesting as that was something that was
> > not discussed on the farm
> > that I recall.  I suspect pullers use that to the maximum.
> >
> >
> > Dean VP
> > Snohomish, WA
> >
> > If we can employ guards with guns to protect money, we can and should
> employ
> > guards with guns to
> > protect people. Bernard Goldberg.
> >
> >
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com
> > [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of
> > charlie hill
> > Sent: Sunday, November 22, 2015 5:15 AM
> > To: Antique tractor email discussion group
> > Subject: Re: [AT] How can they farm like that
> >
> > I remember reading one Progressive Farmer article about tire slippage
> where
> > it explained
> > that a tire could not roll without slipping (I guess unless it had an
> > infinitely small contact patch).
> > It continued to discuss the optimum % of slippage for applying HP to the
> > ground.  If I remember
> > right it was between 12 and 15%.  It occurs to me that that percentage
> range
> > turns up a lot in
> > agriculture and construction.  Everything from wheel slippage to moisture
> > content in grain
> > and also in the wood in a building.
> >
> > Charlie
> >
> >
> > -----Original Message-----
> > From: rlgoss at twc.com
> > Sent: Saturday, November 21, 2015 11:33 AM
> > To: Antique tractor email discussion group
> > Subject: Re: [AT] How can they farm like that
> >
> > We only had one jack and inadequate cribbing on the farm, so we never
> > bothered making sure the treads headed the right direction.  Besides, the
> > rear tires had closed ends on the rubber cleats and we were never able to
> > detect any difference in traction regardless of the direction of
> rotation.
> > I used to read the tire ads in Successful Farming and wish WE had those
> > new-style treads that cleared themselves of mud, etc.
> >
> >
> > Larry
> > ---- Don <don.bowen at earthlink.net> wrote:
> >> On 11/21/2015 7:39 AM, Indiana Robinson wrote:
> >>> On dished wheel tractors like this I always sat the wheels out for
> >>> cultivating row crops by switching sides but some guys just flipped
> them
> >>> around one side at a time. I knew several that said that they didn't
> >>> have a
> >>> jack big enough to lift the whole back of the tractor at once.
> >> We switched side to side on the Ferguson for spraying and cultivating.
> >> My father also put fluid in the tires.  He would take one wheel off and
> >> lean it against the tree then take the other wheel and put it in the
> >> other side.  One year while trying to set the first wheel up to roll it
> >> he slipped and the tire pinned him against the tree.  He was stuck until
> >> my mother called someone to come help.  Luckily no serious injuries.
> >>
> >> --
> >> Don Bowen       --AD0NB--
> >>
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