can i fly a very light aircraft with a small lawn mower engine?
I am trying to build an enclosed ultralight aircraft similar to the Cri-Cri made by michael colomban. I think i can make it around 100 or 150 pounds. I have an engine that is somewhere between five and ten horse power. i could possibly get another one of relatively the same amount of power. i have read about the DA-11 made by leeon davis that ran on an 18 hp engine, but is there a way to calculate weight vs. hp so i can be sure it will fly? (;