On May 22, 2005, about 0830 central daylight time, an amateur-built Young Zodiac 601XL, N601AY, piloted by a private pilot, was substantially damaged when it impacted runway 29 (6,501 feet by 150 feet, concrete) while attempting to land at Coles County Memorial Airport (MTO), Mattoon, Illinois. The flight was conducted under 14 CFR Part 91 without a flight plan. Visual meteorological conditions prevailed. The pilot reported no injuries. In his written statement, the pilot reported that the accident occurred during the third flight of the experimental airplane. He remained in the traffic pattern after take off with the intention of performing several stop-and-goes. He stated that as he turned final he decided to approach at 90 miles-per-hour (mph) instead of the normal 80 mph approach speed. He noted that he planned to evaluate the airplane's handling characteristics at the higher speed while in ground effect and during the landing flare. The pilot stated: "As I reached the [runway] numbers I reduced power slightly to begin my descent to the runway. The next thing I knew I had hit the runway." The pilot reported no mechanical malfunctions of the aircraft. He noted that there were no issues with elevator control and that the airplane was within published weight and balance limits. The pilot reported winds from 290 degrees at 10 knots at the time of the accident. The MTO Automated Surface Observing System at 0753 recorded winds from 180 degrees at 6 knots. At 0853, the recorded winds were from 180 degrees at 7 knots.