For $128,000 you can buy a Jetson ONE, take off from your backyard, and never need a pilot's license. Every spec on it is reverse-engineered from a single FAA regulation. Part 103 caps ultralight empty weight at 254 pounds. Jetson built theirs at 189. Part 103 caps level flight at 55 knots. Jetson tops out at 63 mph, exactly that. Part 103 allows one occupant. Jetson built one seat. Stay inside those lines and the FAA does not classify what you are flying as an aircraft. No pilot's license.…