On June 15, 2005, at 1650 central daylight time, an amateur-built Quicksilver Sport 2S, N44242, sustained substantial damage when it overran the departure end of runway 35 (2,100 feet by 70 feet, turf) during takeoff at Maize Airport (70K), Maize, Kansas. The certified flight instructor (CFI) and student pilot were not injured. The 14 Code of Federal Regulations Part 91 instructional flight departed 70K on a local flight. Visual meteorological conditions prevailed at the time of the accident. No flight plan was filed. The CFI reported that the south end of runway 35 was "unusable due to excessive standing water on the runway" so the airplane was positioned about midfield for takeoff. The CFI reported that about 1,100 feet of runway remained for takeoff. The CFI reported that during the takeoff roll, it was determined that the airplane was "not going to lift off" and that there was "insufficient runway remaining to stop the aircraft." The CFI reported that the airplane overran the north end of the runway and nosed over about 20-40 feet from the departure end of the runway. The CFI and student pilot exited the airplane without injuries. The CFI reported that a "northerly departure was chosen due to the favorable terrain north of the airport for an emergency landing if needed." The CFI reported that the winds were 180 degrees at 5 knots. The student pilot owned the amateur-built airplane. He was receiving flight instruction for a sport pilot certificate. The airplane had a total of 8.6 total hours of operation.