Let's have a measurement discussion
So, as some of you know, I do calibration for a living.
Well, while surfing the daeth star (amazon) I found something pretty cool
A mass set for $11, very similar to our everyday mass sets
100 grams to 10 mg
so, for measurement purposes, I bought 2
So, we shot numbers on them as a Class F
a little adjusting would dial them in nicely
I plan to do another panel on cal'g you scale, and how to get an extra digit of resolution on a scale later
the main masses you would use for scaling cars are only a few mg from passing
also, we always take as found data without cleaning, so these masses are truly open the box and run them (EMI is basicly the uncertainty of the value recorded about 50 micro grams)
Both mass sets lined up pretty well
not a bad deal for $11. I'll use my scale at home to dial these in.
I may try to make some tuned ones available later this year
dr
Discussion
for easy math, let imagine I build a car
100 gram car, 102 limit for race so safe there
100 g (resolution) scale
lets try to figure out balance
f/r% 51/49 is the best you can see
you are always ± 1 lowest count
so, I could be 50/50 perfect or 52/48
(called d count, aka d=100, in the scale above, below is a d=1000)
anyways in this case ±1g as best as you can tell
same car, measured on a 100.0 resolution scale
50.6g/49.4% f/r or 51.4/49.6%
or 50.006/49.994
big difference in balance
scale lets you resolve better, with more d counts
(and repeatability, another story...)
the masses are where we get the accuracy,
and help us tune the scale
dr
- You ARE the DR.! I got lost early on in your post. I think it was the 3rd word into it........math. — Dutch_Clutch_Racing
Good info Mate!
Guys are just shooting in the dark if you don't have a good scale test weight to verify your scale. Luckily it isn't that expensive to get a set. Also luckily, we have a 1 gram margin, usually. But good racers looking for every advantage can get that advantage on you by using that 1 gram extra to burn you down when everything else is equal...
Alas, I am not yet at that level when I am 10th's off the fastest speed, but others are not and a good quality scale set may make the difference for you.