[AT] O.T. Woodruff vs straight keys

[Mogrits]

Cecil I remember that story. Also another one that he plumbed the fuel
intake through the roll cage for the same reason.

Got protested after winning a fuel mileage battle. Dropped the tank and
removed from car for NASCAR inspection. Passed the inspection. Threw the
tank on the trunk lid and drove the car back to the pits with the tank
removed. So much fokelore vanishing and lost from that sport.

Warren

On Thu, Aug 17, 2017 at 1:01 PM, Phil M. Vorwerk <pvorwerk at newulmtel.net>
wrote:

> Sounds like he was the Smokey Yunick of snowmobile racing...
>
>
> Phil
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Ken Knierim
> Sent: Tuesday, August 15, 2017 2:26 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] O.T. Woodruff vs straight keys
>
> Charlie,
>
> You might find this if they were trying to get more timing advance as well.
>
> Lots of different parts have been used in racing. I know of one (former)
> snowmobile racer that used one smaller cylinder out of the 3 on his sled.
> When they had to get a tech inspection after the race, he pulled the
> (smaller) cylinder down for the inspection and it magically met the specs
> for the engine. Interestingly enough, the other two were larger
> displacement
> cylinders from a bigger engine variant but they had the same exterior. The
> rules for the tech inspection only required one cylinder get measured.
>
> Ken in AZ
>
> On Tue, Aug 15, 2017 at 11:33 AM, charlie hill <charliehill at embarqmail.com
> >
> wrote:
>
> > Larry, you reminded me of something.  Years ago I had buddies who
> > raced go carts.
> > They often ran souped up 5hp B&S engines.  One of the tricks was to
> > run a 3HP flywheel on the 5HP engine to reduce weight.  In order to do
> > that they had a special crank key with a slight offset in it to get
> > the timing back to the correct setting.
> >
> > Have you ever run into that?
> >
> > Charlie
> >
> > -----Original Message-----
> > From: Rena Glover Goss
> > Sent: Saturday, August 12, 2017 11:42 AM
> > To: Antique tractor email discussion group
> > Subject: Re: [AT] O.T. Woodruff vs straight keys
> >
> > A key can be used as a safety limiter on torque so that it shears
> > instead of breaking gear teeth, etc.  In that case, the length of the
> > key can be used to adjust the break-away torque load.  Some small
> > engines (like Briggs) use a particular metal for the key to get this
> > type of safety.  In the lawnmower repair shop business, I often ran
> > into engines where the owners had replaced the OEM key with a steel
> > one.  I presume they thought that "any ol' key"
> > would do the job.  Never mind that when they hit a gas pipe with their
> > lawnmower, they twisted off the crank shaft!
> >
> >
> > Larry
> > ---- Dennis Johnson <moscowengnr at outlook.com> wrote:
> > > I think there are 2 main reasons for woodruff keys
> > > 1 - these keys are contained from side to side so they cannot slip.
> > > You can also use other types of key ways that enclose the keys, but
> > > the most common is to cut keyway to the end of the shaft.
> > > 2 - the woodruff keys may take less material out of the shaft. This
> > > might weaken the shaft slightly less.
> > >
> > > Dennis
> > >
> > > Sent from my iPad
> > >
> > > > On Aug 11, 2017, at 8:13 PM, "joehardy at epix.net"
> > > > <joehardy at epix.net>
> > > > wrote:
> > > >
> > > > My brother is rebuilding a corn chopper and having difficulty
> > > > replacing bearings on the pick up head. Couldn't get to slide the
> > > > bevel gears off drive shaft. He asked me why woodruff keys were
> > > > used instead of
> > straight
> > > > keys. Thought I'd throw his question out to our group. Ref: Read
> > > > discussion on Practical Machinist. Joe Hardisky, Ryman Farm,
> > > > Dallas, PA _______________________________________________
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