[AT] 1949 Case VAC is home.

Wed Aug 20 07:41:29 PDT 2008

Thanks, George!

I must admit that Charlie's mention of Briggs brought to mind
something of about 3-4HP and from there it was short stretch to assume
(yeah, I know) that a fair percentage of the full rated HP would be
needed to move the tractor along, even very very slowly.  Thus it
might not be running at 3600rpm, granted, but still I expect in the
range of 1500-2000rpm.  Less if my first assumption is bad and it's a
larger engine.

Thanks also for the link to Bob Learned's page.  It's been ten
years... yes, time does fly.

Any other mods to that butt-buggy to achieve such low RPM? Intake
restriction or the like?  Seems that accurate carburetion would be a
challenge otherwise at such low flow.

Best regards,
Steve O.

On Wed, Aug 20, 2008 at 10:22 AM, George Willer <gwill at gwill.net> wrote:
> Steve,
>
> Steve,
>
> As you know, most Briggs engines will do a good day's work running much
> slower than rated maximum.  I have one slightly modified to run at very slow
> RPM, I'll guess less than 100 RPM.  More on that later.  Many engines had
> 6:1 gear reductions built in such as one I used for years on my mortar
> mixer.  I imagine what Charlie is talking about is a conversion to make the
> ground speed very low for a special purpose.
>
> Our departed ATIS friend, Bob Learned's Briggs page is still available 10
> years after his death at a permanent location:
> http://www.asecc.com/data/briggs/   It's a wealth of information on the many
> Briggs engine variations built over the years.
>
> The slow engine referenced above is on a two seated butt buggy that's been
> to Portland a few times.  It's just a rear engine mower with a very heavy
> flywheel replacing the mower pulley and larger drive pulley on the vertical
> shaft.  The slow put-put of the Briggs engine turns heads.  With its 3 speed
> transmission it will easily out-run most golf carts.  The most fun is barely
> moving along in 3rd gear.  It has a very unusual sound.
>
> George
>
>> -----Original Message-----
>> From: at-bounces at lists.antique-tractor.com [mailto:at-
>> bounces at lists.antique-tractor.com] On Behalf Of Stephen Offiler
>> Sent: Wednesday, August 20, 2008 7:47 AM
>> To: Antique tractor email discussion group
>> Subject: Re: [AT] 1949 Case VAC is home.
>>
>> Charlie, what was the purpose of the B&S?  Were they going for better
>> fuel economy?  Those small engines usually run at 3600rpm so in
>> itself, it would certainly not slow down the tractor, unless of course
>> a reduction gearset was part of the mix.  Now however it's starting to
>> sound a bit more complicated.  Thus I wonder why...
>>
>> Steve O.
>>
>> On Tue, Aug 19, 2008 at 11:21 PM, charlie hill
>> <charliehill at embarqmail.com> wrote:
>> > George,  years ago there were a fair number of cucumber farmers in this
>> > area.  Many of them used a very low frame with seats on it for folks to
>> ride
>> > and pick the cucs.  Obviously they had to go very slow.  Some of them
>> > accomplished the slow part by pulling it with JD's that had the engine
>> > replaced with a Briggs and Stratton.
>> >
>> > At the time I just saw it as a curiosity and never bothered to go into
>> the
>> > field and look at one of the up close.  I don't have clue how it was
>> hooked
>> > up.  I'm not really up on JD's either but I think they were A's.
>> >
>> > Anyone else seen one rigged up like that?
>> >
>> > charlie
>> > ----- Original Message -----
>> > From: "George Willer" <gwill at gwill.net>
>> > To: "'Antique tractor email discussion group'"
>> > <at at lists.antique-tractor.com>
>> > Sent: Tuesday, August 19, 2008 10:58 PM
>> > Subject: Re: [AT] 1949 Case VAC is home.
>> >
>> >
>> >> Don,
>> >>
>> >> Of all the tractors to re-power with some other engine, the F-12 would
>> be
>> >> among the easiest.  Converting to an in-line 6 cylinder would require
>> >> lengthening the frame, etc. but even that would be fairly easy.
>> >>
>> >> Putting a V-8 in a JD A would require a bit more thought.  Removing the
>> JD
>> >> crank throws and replacing them with a ring gear and pinion... and
>> keeping
>> >> everything in line would be light years more difficult.  I imagine
>> that's
>> >> what you and your friend were planning?
>> >>
>> >> Another interesting conversion... A hit and miss powering a JD by
>> running
>> >> a
>> >> belt from belt pulley to belt pulley.  The power went in through what
>> >> should
>> >> be the output!
>> >>
>> >> Keep in mind that these interesting conversions aren't required to be
>> >> practical.  ;-)
>> >>
>> >> George
>> >>
>> >>> -----Original Message-----
>> >>> From: at-bounces at lists.antique-tractor.com [mailto:at-
>> >>> bounces at lists.antique-tractor.com] On Behalf Of Don Bowen
>> >>> Sent: Tuesday, August 19, 2008 10:29 PM
>> >>> To: 'Antique tractor email discussion group'
>> >>> Subject: Re: [AT] 1949 Case VAC is home.
>> >>>
>> >>> > Have you relocated to MO?
>> >>>
>> >>> At least for the summer months until my wife retires.  I get to play
>> with
>> >>> tractors here.
>> >>>
>> >>> > Some years ago, maybe 10 or so, there was a JD A or G with a V-8
>> Jimmy
>> >>> > diesel that sneaked in among our ATIS tractors at Portland
>> >>>
>> >>> I saw an F12 with a 454 at Vista.  I looked interesting but I do not
>> >>> think
>> >>> you could get very far into it before something broke.
>> >>>
>> >>> Don Bowen  KI6DIU
>> >>> http://www.braingarage.com/Dons/Travels/journal/Journal.html
>> >>>
>> >>>
>> >>> _______________________________________________
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