Hi Moose,
I referred to Wikipedia for typical blade lengths and rotational
speeds. From what I see, the maximum tip speed would be around 300
ft/sec, well below any supersonic effects. There are probably other
limits at play here, of which I have no knowledge.
Jim Nichols
Tullahoma, TN USA
On 3/23/2014 9:53 PM, Moose wrote:
> Then it occurred to me that it might by the same thing as airplane
> propellers run into, tips going supersonic? Those long blades are
> longer than a semi trailer. Destabilize them, and they could fly off
> wipe out a farm. Mach ? Moose
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