It was Robert Rupert Turnbull, a Canadian engineer. It was first tested in flight in 1927.
See www.thecanadianencyclopedia.com for more info.
The first ticker tape machine was invented in 1856. -Wikipedia
the Romans
The first credit card, Diners, was invented by Ralph Schneider in 1950.
diner's club
In 1870, Thomas Edison invented the first stock ticker to print letters as well as numbers.
Orville and Wilbur wright invented the first airplane.the wright brothers.
in japan
The Wright Brothers. === ===
1957
He invented the steamboat propeller.
1925 b.C.
Mary Macala in 1947 in Washington :) your welcome
Propeller
Wallace R. Turnbull invented the variable-pitch propeller.
If you mean "the first plane that had a motor and propeller, and could fly" then it was the Wright Brothers. If you're not worried about the thing being able to fly, there were LOTS of guys who made propeller planes that couldn't fly.
Well first, u have to go and get a propeller off of something. Then you should go and glue a couple of pieces of popsicle sticks then get an axel and put wheels on it. Then get rubberbands to put the propeller on.
1) keyed propeller and 2) keyless propeller................... they have further classificaton 1.fixed pitch propeller 2.controllable pitch propeller 3.directional pitch propeller