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Old 12-22-2009, 06:05 PM   #151
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Why is everyone surprised? This is what roar does. They stand back for so long, let everyone (companies/racers) stretch the rules to the max then change the rules. Then they change their mind on how they enforce it. Remember the carpet nats in Conn. Orr won with brushless and they had no clue what to do. So they let it run. He won. Then years later they finally put guidlines up. This rule is a joke. Now after coming back into onroad and getting the right chargers with the right update, they are changing the rules. wasted racers money. Im not surprised. ROAR is a joke. The only reason i go to the nationals is because the track thats hosting it. not the roar crew or their rules. supporting the tracks not the problem
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Old 12-22-2009, 06:05 PM   #152
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Old 12-22-2009, 06:22 PM   #153
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Old 12-22-2009, 06:30 PM   #154
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Like it or not, there are tolerances on everything electronic, computer controlled or not. A lot of electronic components are spec'ed with either 5% or 10% tolerance. For example, the second meter we used at the Halloween Classic, a Fluke 77, has an published accuracy of +/- 0.3%. There isn't a specification for repeatability, so even if the battery is exactly 8.400 volts, the meter could read 8.425 volts. Or an illegal 8.425 v battery could read 8.400 v. Adam claims that this would result in the racer being DQ'd for that round, when in fact it is the measuring device that is wrong. Also, note that Fluke specifies this as the "Best Accuracy", whatever that means. And the values also vary with temperature.


To the best of my knowledge, my ICE and Checkpoint chargers aren't upgradable, and are pre-programmed to stop the charging process at a non-configurable voltage (and mine read back the voltage as between 8.401 and 8.405 when charging is complete). So if the tolerances line up such that the charger's built-in meter reads low, and the ROAR meter reads high, what should the racer do? (Don't forget the repeatability factor). If you say that they should come and check the voltage after every charging cycle during the Nats on the ROAR meter before coming through tech, you're not being realistic.

Why not use some common sense and allow the racer to run the car to drop the voltage into the "legal" range before being allowed through tech? The last thing that this hobby needs is to alienate paying customers in the current economy.
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Old 12-22-2009, 06:43 PM   #155
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I think we have more important issues than arguing over 0.04 or 0.02 volts.

Here is a summary.

ROAR removed the .04 and .02 tolerance for Lipo Batteries for their events.

The tech team is there to help you match your battery charger voltage reading with their meter. You figure out through simple math calculations where your charger needs to stop charging, either manually or automatic.

If everyone is being measured by the same meter from when the doors open to when the doors close does it really matter if it is 100% accurate or not? Probably not.

You move forward from that point on.

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