On August 30, 1995, about 1445 eastern daylight time, an Insua L-21 homebuilt airplane, N2446V, piloted by the registered owner, sustained substantial damage when the right wing struck the ground during the landing roll in Petersburg, Virginia. The private pilot and one passenger, the sole occupants, reported no injuries. Visual meteorological conditions prevailed for the pleasure flight, no flight plan was filed. The flight operated under 14 CFR Part 91, and originated in Florence, South Carolina approximately 1115. The pilot stated that he landed at Petersburg, Virginia to refuel, and intended to continue on to Cambridge, Maryland. He reported that he landed on runway 5, but "...lost control on touchdown...plane ground looped to [the] left... ." The right main landing gear collapsed and the right wing struck the ground. The pilot reported that the winds were calm, and that there was no mechanical malfunction.