Trivia | 21 March 2022
Helicopter powered by humanPeople are trying to catch up with the birds from the beginning. We have airplanes, jets, gliders and sailplanes. Now it’s time for a helicopter powered by a man! Imagine […]
Trivia | 21 March 2022
Helicopter powered by humanPeople are trying to catch up with the birds from the beginning. We have airplanes, jets, gliders and sailplanes. Now it’s time for a helicopter powered by a man! Imagine […]