Time since introduction of the first mass-produced helicopter (Sikorsky R-4)

Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (80 y)

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If Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (80 y) was a standard unit ...

Time since earliest wheeled vehicles (4,000 y)...more would be 50 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the start of the Iron Age (3,200 y)...more would be 40 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the birth of Hero of Alexandria (2,014 y)...more would be 25 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the death of Shakespeare (406 y)...more would be 5 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the birth of Euler (316 y)...more would be 4 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the first iron steamship crossed the English Channel (202 y)...more would be 2.5 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the first passenger steam railway service (199 y)...more would be 2.5 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the publication of Volume 1 of Marx's Das Kapital (157 y)...more would be 2 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since the birth of physicist Marie Curie (157 y)...more would be 2 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Lifespan of human being (80 y)...more would be about as big as Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Time since first Apple Macintosh Computer launched (40 y)...more would be 1/2 of Time since introduction of the first mass-produced helicopter (Sikorsky R-4)
Lifespan of rat (2 y)...more would be 1/40 of Time since introduction of the first mass-produced helicopter (Sikorsky R-4)