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There are birds on Earth with long takeoff ratios. Examples include the bufflehead and the coot, who paddle and then run on the water to assist their wings. On land, turkeys run a few steps; many large predators jump from a treetop or a cliff to get going. Remember - regardless of size, if a bird can fly it will have very low body density.


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That jet takeoff is going to be difficult to sustain. I think somebody else mentioned it can't be nitrogen. Maybe digestive gasses including hydrogen and methane? I'm not sure how efficient such a jet can be made. There will be refinements in the "nozzle" as it were. Jet engines are far more complicated than just burning stuff through a small hole. You ...


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Long, long ago, there was a creature now known as quetzalcoatlis Northropii. It wasn't the largest of the pterosaurs, but it's the most complete large pterosaur (at least as of the last time I checked in detail). It was primarily a soaring creature, as are all very large birds, but paleontologists believe it could launch itself from level ground by using a ...


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Design: The bigger and heavier the roc is, the larger the ratio of wings to body will be. If you want it to be huge, it might look like a small body suspended in between two massive sail-like wings made of an extremely thin, likely translucent membrane of flesh. Takeoff: For take-off purposes, these giant wings could be collapsible, folding in multiple ...


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The Roc would be able to fly at high altitudes, up to 15,000 feet Many birds do this already. I remember reading that a flock of I think geese was seen by the crew of a commercial flight at cruise height, and they go 24000 feet and above. The Roc would be able to maintain altitude for long periods of time, rarely returning to the Earth to land. ...


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I don't think that enough crows will be able to cooperate enough to figure out what they need to do to design the tools they'll need to make a machine that can make a machine to fly to the moon. Their only useful appendage for manipulating things are their bills. And, assuming that there were round door knobs left on the planet, and they could operate ...


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