Comments by "E R" (@er...) on "Veritasium"
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@johnborton4522 I would greatly appreciate it if you could. I get that sailboats do it, but that's different and they do not even need gears. Sailboats can accept wind power from multiple directions simultaneously and are on water so need power lost to turning wheels. The vehicle built for this experiment is supposed to go faster than wind with only wind power, but the gears change the output. I know this is a terrible example, but take two vehicles with identical weight and horsepower but different gear ratio, the gears change output. So the experiment is not what it seems to me because gears are allowing it to top wind speed. I'm sure I am overlooking something glaring and obvious, but at the same time the gears taken out of the equation would cause a different result, not? Wind cannot produce this result on its own if gears are required. Depending on the gear ratio, this experiment could have produced 100mph, but it would be the gears responsibility for changing output of wind power, not? Hope that made sense, thanks.
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@johnborton4522 To recap my previous posts:
As explained, and agreed to by Derek, in an Engineering with Rosie video, "the wheel diameter [is] 0.7m and a gear ratio of 2:1 [means] the wheels are turning twice as fast as the propeller."
Furthermore, it is confirmed in the video made by the woman who built the toy model for the treadmill, wheel to propeller ratio must by 0.7 for it to go forward, otherwise it will not work.
The vehicle built for this experiment is supposed to go faster than wind with only wind power, but the gears change the output. I know this is a terrible example, but take two vehicles with identical weight and horsepower but different gear ratio, the gears change output. So the experiment is not what it seems to me because gears are allowing it to top wind speed. I'm sure I am overlooking something glaring and obvious, but at the same time the gears taken out of the equation would cause a different result, not? Wind cannot produce this result on its own if gears are required. Depending on the gear ratio, this experiment could have produced 100mph, but it would be the gears responsibility for changing output of wind power, not? Gearing changes output. Is it going faster than wind speed because of gearing? It seems so to me. Could it go faster than wind speed without it? It seems not so in this scenario.
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