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I feel confident enough in understanding how it works that I can do predictions of what happens if you change things.
If you'd run the Blackbird backwards it would still run downwind faster than the wind.
Likewise, if you put the model backwards on the treadmill it would still run faster than the tread.
If you change the gearing on Blackbird so that the propeller moves air faster than the wheels run over the ground (instead of slower), then it would run straight against the wind instead of with it. It would do so even backwards.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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