What if you put a giant propeller on a bicycle?

I dive into my old collection of Popular Mechanics magazines and get inspired to build something! I found Ernest Winter's air screw bike, so I tried to build it. He claims it can hit 20 mph, can I match his speed? How will I build the propeller? How can I power it with my feet? Will it be fast enough to fly? How does that compare to a huge fan? I continue the journey to check it out and more! Stabila Protractor New Welding Hex Lock Kit Professional cyclists helped us on our journey More fun stuff