What is the most efficient design for an aircraft limited to a maximum velocity of 30mph at a maximum altitude of 100ft?
The objective is to minimize drag and weight. The payload would be 1 human, and my budget is approximately 100,000 dollars (more can be done) for materials I was thinking airloys (because they are light and strong). The end goal is to go more than 74 miles on flat train using human power.
My guesses are aircrafts shaped like a sail plane or a Ground Effect Vehicles (GEVs).