GlassyClass on wed 14 nov 01
Thanks Everyone,
The winner of the math wizard award has to go to Don Goodrich, I got so many
answers, and all of them worked, only Don also included a Excel spreadsheet
that calculates the speed at .5 mph increments, (from 1 MPH to 17 MPH) from
looking at it so far, I think he set it up so that I can plug in different
wheel sizes, and get new values for RPM and RPS (which I think means rev's
per second).
I think he has some pretty cool candle votive also, bet they would be a good
seller for those of you who make stuff for shops. Uses melted glass as a
reflector, bet he might give you some pointers if you ask him, (that odd
science of COE's of clay and glass) check out his site.
http://members.aol.com/goodrichdn/
On a side note, I think I broke my meter, I took the back off to see if it
was adjustable for the wheel size, (nothing to adjust) it is not working
right now, won't stay running, blinks on and off. Although if I can find the
model that someone suggested at the bike shop, the new Argos would be a
better deal (not sure what 7 pounds equals in US dollars), since it reads
out in RPM directly.
Before I broke it, did figure out that the 1.5 inch drive roller will give
me 97.8 RPM, the 2 inch roller will give me 128 RPM, the 2.5 inch roller
will give me 152.8 RPM. Got the two inch on it now, seems to be plenty fast
enough.
Think I got a pretty darn good kickwheel for about 200 dollars now. About
the price of the Brent kit, without the frame.
Thank You Everyone,
Bud
----- Original Message -----
From: "Jim Bob Salazar"
Sent: Wednesday, November 14, 2001 2:34 PM
Subject: Re: MPH to RPM for the Math Wizards.
> man, i wish i were smart like that!!!
>
> jim bob
>
> Michael Wendt wrote:
>
> > Bud,
> > Figure it this way : 1 mile = 5280 feet so 1 mph = 5280 ft/ hr / 60
> > minutes per hour = 88 ft/ minute. 27.5" / 12"/ ft gives 2.29 ft X PI
(
> > 3.14) gives the circuference of the wheel = 7.2 ft so... divide 88 ft
by
> > 7.2 ft to get 12.2 rpm per mile per hour on the speedometer IF it is
hooked
> > up correctly.
> > Regards,
> > Michael Wendt wendtpot@lewiston.com
> > You wrote:
> > The bike meter is calibrated for a 27.5 inch bike wheel, it reads out in
> > MPH, the motor spins the flywheel up to a top speed of 8 MPH.
> >
> >
____________________________________________________________________________
__
> > Send postings to clayart@lsv.ceramics.org
> >
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> >
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melpots@pclink.com.
>
GlassyClass on thu 15 nov 01
Well actually I do take a lot of stuff apart to see how it works.
Built my slab roller by studying the one at the store for hours, and drawing
pictures on scraps of paper, figured that the meter was not that much, and
it was a very old one, at least I think so, and if I can get one that will
read actual RPM, that would be much better. If not, at least before I broke
it, was able to figure out what MPH the different rollers got the flywheel
speed up to, and with Don's excel spreadsheet, now know what those numbers
equal to in actual RPM.
So not really worried that I broke the little bike meter, since they tend to
be for folks that ride their bikes and worry about how far they have gone,
or how fast, or how long have they been pumping their little legs off. :-)
(which I must have been, since I had one of the little thingy's)
Next project is going to be a screw drive extruder, figure that I can use my
half inch drill as a power source, and got some acme British thread rod
(strong thread stuff) as the drive rod, basing it on a cookie press that I
found, and have been using to extrude little decorative handles and foot
rings for large slab bowls that I have been making. Did some marbling today,
turned out pretty good, I think they are going to look great.
Sincerely,
Bud Britt
----- Original Message -----
From: "Earl Brunner"
Sent: Thursday, November 15, 2001 7:15 AM
Subject: Re: Thank You Everyone Re: MPH to RPM for the Math Wizards.
> RPM of the motor, diameter of the rubber sander thingy, diameter of the
> flywheel on your kick wheel, you didn't give all the information one
> would need to figure it out, (at least in the message I read) so I just
> trashed it.
>
> LOL, I about died laughing, I have this picture in my head of you
> opening up everything to "see how it works".
>
> --
> Earl Brunner
> http://coyote.accessnv.com/bruec/
> bruec@anv.net
>
Earl Brunner on thu 15 nov 01
RPM of the motor, diameter of the rubber sander thingy, diameter of the
flywheel on your kick wheel, you didn't give all the information one
would need to figure it out, (at least in the message I read) so I just
trashed it.
LOL, I about died laughing, I have this picture in my head of you
opening up everything to "see how it works".
GlassyClass wrote:
> Thanks Everyone,
>
> The winner of the math wizard award has to go to Don Goodrich, I got so many
> answers, and all of them worked, only Don also included a Excel spreadsheet
> On a side note, I think I broke my meter, I took the back off to see if it
> was adjustable for the wheel size, (nothing to adjust) it is not working
> right now, won't stay running, blinks on and off. Although if I can find the
> model that someone suggested at the bike shop, the new Argos would be a
> better deal (not sure what 7 pounds equals in US dollars), since it reads
> out in RPM directly.
>
> Before I broke it, did figure out that the 1.5 inch drive roller will give
> me 97.8 RPM, the 2 inch roller will give me 128 RPM, the 2.5 inch roller
> will give me 152.8 RPM. Got the two inch on it now, seems to be plenty fast
> enough.
>
> Think I got a pretty darn good kickwheel for about 200 dollars now. About
> the price of the Brent kit, without the frame.
>
> Thank You Everyone,
> Bud
>
--
Earl Brunner
http://coyote.accessnv.com/bruec/
bruec@anv.net
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