Quote:
Originally Posted by Nemo
I never even thought of the battery voltage drop. I'll have to find that math. I'll add voltage to the spreadsheet. I might have to come back and ask for help on how to estimate that voltage drop, though. It seems like that should help me get a more realistic estimate of how fast the gearing can be while still being traction limited.
Related to post 2, I did notice how flat that curve is for 10-15 ft sprint times. I don't really understand why anybody would want to be on the fast side of that sweet spot. What is a good reason for gearing it to 17 ft/s when 12 ft/s gets you there just as quickly?
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Battery voltage drop shouldn't be too difficult. I imagine you take your current you're running at and multiply it by your battery's internal resistance, and you end up with the drop in voltage. Say, for example, if you're pulling 150 Amps and your battery's internal resistance is 20 mOhms, you'll have a voltage drop of 3 Volts, so instead of supplying 13V (which seems to be the typical charge at the start of a match), you're really supplying only 10V.
Don't "quote" me on that, but I think that's how the math would work out. Anyone with more authority on the subject care to tear my analysis apart?