"Mxsmanic" wrote in message
...
Gig 601XL Builder writes:

That's going to be damn hard to do there aren't to many prop planes with
the
same thrust and max speed as your average jet.

NASA has done it, but as I've said, the noise level is so high that it
isn't practical (passengers and crew might well suffer hearing damage
from the noise).

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Yes NASA has made plenty of very loud things. Did you ever wonder why NASA
was trying to build high speed propeller driven aircraft?