Owner's Manual

Original Version
The blades
of
the propeller have an oblong shape
The tips
of
the blades come
to
a flattened point
The edges
of
the blades are rounded
Updated Version (Version You Have)
The blades
of
the propeller have a rectangular
shape
The tips
of
the blades
come
to
a rounded,
90-degree angle
The edges
of
the blades are flat