jduffy77
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kmarinas86 said:It would provide thrust in the other direction.
It would not do so using an identical transmission.
kmarinas86 said:This invalidates the argument that all you need for the craft to work is for angled sails to revolve around a "cylindrical earth" (so to speak). Counter-thrusting the props (matched-angled sails ("matched-angled" due to the 180-degree rotation) moving in opposite directions around this "cylindrical earth" (so to speak)) would eliminate the very thing that the Blackbird requires to operate DDTWFTTW: the propeller thrust as advantaged by the interaction between the ground, wheels, transmission, frame, propellers, and the wind.
Note: The notion of a "cylindrical earth" is found in Scenario 2 of the video that has been referenced in this thread several times.
It is not an "argument" to say that angled sails are revolving around a "cylindrical earth". It is a fact. It is called the prop. I do not see how your second prop scenario would invalidate anything even if it were true. You have yet to say exactly what is wrong with the scenario in the video. Do you not believe it could be built?
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