On 04/16/2013 12:09 PM, Onno Meyer wrote:
If you were forced to use only two rotors, are there materials in existence
>that will be strong enough to make the blades? Could you reach a point
>where there is reduced effectiveness because you are pulling air out of our
>source area faster than it can replenish?
That's why I went for ducted fans.
You also hit a serious problem when the ends of your blades exceed the
speed of sound. Although I wonder if you could start to treat the air as
more of a solid as propeller speed begins to greatly exceed flow speed.
Supersonic physics is pretty weird.
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