Quote:
Originally Posted by Bicycle Bob
Reynolds does not predict flight performance per se, but yes, you can lighten a human-powered aircraft enough to support its own weight and hang together at 3MPH. Models do it. Wings are often tested at 3,6 , and 9 million Re, and the data curves are quite similar. The forces scale strongly with speed, but the details just change enough to make it worth checking. It is mostly about how much the shape is getting padded out with sticky air.
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Just wanted to say thanks, Bob. I searched a bit. I can find 110V fans for several hundred bux that push well over 10k cfm. I could test well below 60 mph. Scale models don't have to be 1/12-th or less. Combined, a practical sweet spot seems possible. This is a good project to keep inching forward.
