An interesting simple page with illustrations of the rival "Steam
Screw Propeller" patents, by Smith in Great Britain, and Ericsson in
the US, is at:

http://www.history.rochester.edu/steam/stevens/screw.htm

On land there are two propellers that I know of on exhibit in the New
York City vicinity. One is from a "P2" WWII class troop carrier, a
brass propeller, almost two stories high at the Kings Point Merchant
Marine Academy at the end of Steamboat Road in Kings Point, NY outside
the museum there. My grand-dad served on one, the USS Buckner. He said
they had been previously one size, cut in half made and made larger to
accompany a complete infantry unit. On exhibit also, anonymously
stolen and returned after several decades over war veterans treatment,
is the plain white samurai sword surrendered by the Emperor of Japan
at the end of World War II.

Another large brass propeller is on exhibit across the Long Island
Sound from Kings Point, outside of historic Fort Schuyler, home of the
New York State University Maritime College. It is one of four off "The
SS United States (also known as "The Big U") is an ocean liner built
in 1952 for the United States Lines. She is the largest ocean liner
built to date in the United States and is still the fastest liner ever
built." - Wikipedia