contemporary, the Macchi M-67 had 3, but was in 1929 defeated by
engine trouble. The even more impressive Macchi-Castoldi MC-72 had 4
blades, but these were in contra-rotating pairs.4
The Macchi M.67, was an Italian racing seaplane designed by Mario
Castoldi (1888–1968) and built by Macchi for the 1929 Schneider Trophy
race. Macchi M.C.6
Macchi M-67 with a top speed of 440.7mph in 1934.7
This article provides individuals with tools to overcome or at least manage a fear of flying. Flying can be an enjoyable experience if anxiety is not an issue.