It's a recreational 1-seat, 1-engine aircraft that weighs no more than 254 pounds & carries 5 gallons of fuel or less
[DOC] [TLE] Getting Started in Ultralight & Sport Plane Flying [PAR] It's a shame when people put off something they always wanted to do such as ... (
1) An ultralight is a small, very light, single-seat aircraft which is solely for ... of 
less than 254 lbs.