By Xah Lee. Date:
The propeller of a anti-submarine warfare airplane the
. Note the blade's attack angles are variable, and in this case turned flat.
The propellers of a cargo aircraft
Note the blade's attack angle are variable, and in this case turned very sharp.
A contra-rotating propellers of a modified P-51 Mustang fitted with a Rolls-Royce Griffon. Photo by Eric Gideon.