A good scale can be a
very useful tool. Maximum weightis
an important factor in the construction
of a winning car. The closer you can
get to the maximum weight limit, the
more potential energy you will have
"Cars with more mass can
store more Potential Energy to be converted
to Kinetic Energy".
It's the release of that energy that
carries you to the finish line. .
keep all this weight stuff in perspective. Kinetic energy is 1/2
Mv2, so the
car with more mass M must also have a slower velocity v for energy to stay constant. A fraction
of a gram doesn't make a huge difference
at the finish line but one gram can
easily mean the difference between winning
and losing because of the high accuracy
of race timing devices. If you do the
math, 1 gram (0.03 oz) can still makes
about 1/8" difference at the finish
line and some race timers measure 10
times closer than this. So,
if you are really sloppy with your weight
management and go in with a 4 oz car,
you can be behind over ½ car
length or 4" at the finish line.
So, what is the actual
importance of optimizing weight?
a) It is about the same importance as friction
b) It is about the
same importance as air drag control
c) The person inspecting
your car (weighing) thinks it is a lot
more important (like
Aristotle-Lecture 1) and he is the
d) Its a lot easier
to get maximum weight, compared to optimizing a) or b).
Keep in mind -
the weight of your car is just
1 more piece of a puzzle that has many
object with mass
that can be affected by gravity has
= mgh. If your
derby car is in a position to be affected
by gravity (resting at the start pin),
it has gravitational potential energy.
Once the car is in motion it has velocity
and the Potential
is converted to Kinetic
which is the energy of motion. There
is a direct relation between gravitational
potential energy and the height
of an object; the higher that an object
raised above the the ground, the greater
the gravitational potential energy.
We offer a precision Mechanical Counter Balance Scale
to help you to maximize your cars weight for the best
performance possible. I've tested these scales myself
so that I can assure your satisfaction with quality and
performance at an affordable price.
The COUNTER BALANCE CB500 is a unique
precision scale of laboratory-type accuracy that is ideal
for home, group or laboratory use. A
Accuracy is 1 gram or 1/32
of an ounce.
Maximum capacity is 17 ounces
or 500 grams
Weighs ounces, grams, troy
and postal rates
Comes with interchangeable
Adjustable zero set
No springs - this is a counter
Made from tough polymer
with beryllium-copper bearings
Folds compactly for storage
Usual retail - $30.95TOP
OUT OF STOCK
SCALE PRO / 200g x 0.01g
Batteries and 100g Calibration Weight INCLUDED
Capacity: 200gm /7.1oz
Display Resolution: 0.01g
Stainless Steel Weighing Platform
Units: g, oz, ozt, dwt, ct, gn
Auto calibration with 100gm weight (included)
Low battery indicator
Size: 3" W x 4.7" D x 0.75" H ( when closed)
Weighing Platform Size: 2.5" x 2.5"
2 AAA batteries (included)
Need even more accuracy? The WinDerby Pocket
Scale Pro is perfect for very precise weight measurements.
This unit displays accurate weight right down to .0005 ounces
or 0.01 grams.
The new SC200 has a crisp L.C.D. display with a sharp blue backlight. The buttons are also
accessible with the car in place. The folding case design
fully protects the buttons, display and weighing surface
for storage ensuring year after year of perfect performance.
The scale is powered by 2 AAA batteries (included).
0.01 GRAMS or 0.0005 OUNCES!
5 OUNCE CALIBRATED
Check the accuracy of your scale. This
high quality weight is calibrated to +/- 0002 ounces. You
can use this to verify the accuracy of the check in scale
to eliminate questions of accuracy.
Please note that this weight
can not be used to calibrate the WinDerby Digital scales.
You will need a 100 gram weight that is included with the
scale. You can order a replacement calibration weight below.
The design of the weight may vary as suppliers change
Accuracy: 5 oz, +/- 0.0002
SORRY... TEMPORARILY OUT OF STOCK
GRAM CALIBRATION WEIGHT
The WinDerby Pocket Scales require a 100 gram calibration
weight to re calibrate the scale This is an exact replacement
for the weight that comes with the WinDerby Pocket scales.
The design of the weight may vary as suppliers change.
Accuracy: 100 gm, +/- 0.002
"Compare and Save"
January 13, 2014
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