This forum has gotten really quiet lately. Anyway, here is a link on
how to build your own propellers.
http://www.aerodyndesign.com/PROP_10/PROP_10.htm
I like the idea of making your own propellers because I am always
searching for a new design that is more efficient and quieter than
anything currently available. If anyone has any ideas on how to
achieve this, I'm listening. I always start by studying computer fans
as they seem to be getting quieter.
Another thought that crossed my mind today, was if the propeller had
not been invented yet, can you think of another method of moving large
quantities of air to propel a vehicle such as a hovercraft or
aircraft. I thought of maybe the pulse jet but these things are
really noisy, so I gave up on that idea. I am looking for a method of
propelling a hovercraft in stealth mode. This might not be possible
but without a dream, reality becomes just a concept.