CCR question

#1

All the banter back and forth on the horsepower rule has me thinking about rules. Here’s a couple I’ve been thinking about.

[i]SE30 rule 9.3.9.3. Wheels shall … weigh a minimum of thirteen (13) pounds.

CCR 28.1.11. Tolerances. All published measurements infer a tolerance of +/- one-half of the last specified decimal place. All rounding will be done to the nearest decimal place that is specified by the manufacture (sic) or these rules. In a case where a measurement falls exactly on the halfway mark, it shall be rounded up or down in favor of the competitor. This section does not apply whenever the manufacturer, or these rules, specifies a tolerance.[/i]

Technically, there is no “last specified decimal place” for wheels since a decimal place is to the right of the decimal. But clearly the intention is for there to be a tolerance. Here, the value of the last decimal place is 3. So one half of the last specified decimal place is 1.5 lbs. Then again, the last decimal place can be 0 through 9, so is the variance 4.5?

I think the standard interpretation is “one half of a unit in the last decimal place,” or 0.5 lb.

So 12.5 lb wheels are legal, right?

I love it when the rules are clear. :blink: :laugh:

Steve D.

#2

Steve D wrote:

[quote]All the banter back and forth on the horsepower rule has me thinking about rules. Here’s a couple I’ve been thinking about.

[i]SE30 rule 9.3.9.3. Wheels shall … weigh a minimum of thirteen (13) pounds.

CCR 28.1.11. Tolerances. All published measurements infer a tolerance of +/- one-half of the last specified decimal place. All rounding will be done to the nearest decimal place that is specified by the manufacture (sic) or these rules. In a case where a measurement falls exactly on the halfway mark, it shall be rounded up or down in favor of the competitor. This section does not apply whenever the manufacturer, or these rules, specifies a tolerance.[/i]

Technically, there is no “last specified decimal place” for wheels since a decimal place is to the right of the decimal. But clearly the intention is for there to be a tolerance. Here, the value of the last decimal place is 3. So one half of the last specified decimal place is 1.5 lbs. Then again, the last decimal place can be 0 through 9, so is the variance 4.5?

I think the standard interpretation is “one half of a unit in the last decimal place,” or 0.5 lb.

So 12.5 lb wheels are legal, right?

I love it when the rules are clear. :blink: :laugh:

Steve D.[/quote]

It is hard to interpret. I agree that a half pound seems to be what it’s trying to say.

#3

Mathmatically, 13 and 13.0 are identical. In the absence of an explicit weight precision I’d argue that 13 and 13.0 are the intent of the rules and thus +/-.5 lb is within the rules. Dammit, my wheels won’t fit on my lathe.

I like the way you think.