7 years.
one year.
7 years
The design team of Gossamer Condor, led by Paul MacCready, took about three years to accomplish their goal of creating the first human-powered aircraft capable of sustained flight. The project began in 1975 and culminated in its successful flight in 1977. The achievement marked a significant milestone in aviation history, demonstrating the potential of human-powered flight.
how long did it take to complete the liberty bell monument
How long did it take Juan ponce DE Leon to complete his journey?
Not long at all.
it took about 5 to 6 yrs to complete...
A long time
abot a day
120
Oh not that long, a couple of hours! Thanks for asking!
Not long they haven't got far to go