That's where the problem is...
When you have reductions cascaded like that, the gear ratio is
multiplied and not added. This is because the shaft serves as an intermediary and induces a torque on the middle of the sprocket/gear instead of the edge. Your actual gear ratio is 16:1 to the output shaft of the wheels and your top speed would be 12FPS.
If you have three gears in a line and all the teeth are engaged to eachother, that's when the gear ratios are added. This is equivalent to skipping the intermediary gear and taking the gear ratio of the first gear to the last gear.
Quote:
Originally posted by Matt Krass
That's for feet/sec, without the division by 12 it's in/sec I think.
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It all depends on what units you want to use. I was including as little conversions as possible, and therefore was assuming the wheel diameter would be expressed in feet. Obviously you have to divide by 60 to convert from minutes to seconds, an easier value to interpret. Other than that, it's up to personal preference.
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