OSHKOSH, Wis. (AP) - A 58-year-old North Dakota man known for rebuilding old war planes was identified as the pilot killed Friday in a collision with another plane at an experimental air show.

Gerald S. Beck, of Wahpeton, N.D., was killed in the crash of the two single-engine war planes, said Dick Knapinski, a spokesman for the Experimental Aircraft Association, which puts on the weeklong air show called AirVenture.

The other pilot involved in the crash, 24-year-old Casey Odegaard, of Kindred, N.D., received minor injuries.

The two P-51 Mustangs collided while they were landing following a performance at the annual show. P-51 Mustangs are single-seat fighters that were used in World War II.

Witnesses said one plane was behind the other, and when its propeller hit the tail of the other plane, it flipped up and over the other aircraft, landing upside down in a fireball. The other plane tipped up on its nose and the pilot was able to walk away.

Beck had built his plane from the plane's original specifications, Knapinski said. Odegaard was piloting a plane that belonged to his father, Robert Odegaard, also of Kindred.

The Federal Aviation Administration said the accident and the National Transportation Safety Board investigators are investigating. The NTSB planned a news conference to announce findings later in the day on Saturday.

Beck and the elder Odegaard are known in aviation circles for doing complete restorations of World War II military fighter planes. They're among a handful of people in the world who restore such planes, called warbirds.

The two run their own companies specializing in restorations and rebuilding certain plane parts. Beck's company, Tri-State Aviation in Wahpeton, specializes in warbird fuselages. Odegaard and his crew at Odegaard Aviation, about 40 miles away in Kindred, concentrate mainly on wing building.

Knapinski said pilots of P-51s must undergo extensive training because the planes are so powerful and fast. P-51s were often used by the military as bomber escorts during World War II.

Friday's crash was the first that happened during a performance at the air show in the last 15 years, Knapinski said.

On Monday, a veteran pilot trying to break a speed record en route to Oshkosh was killed when his small, experimental plane crashed into an apartment building and playground in Switzerland. The pilot, identified as Hans Georg Schmid, a former Swissair pilot, had been trying to break a world record for a solo single-engine flight. He had planned to fly more than 4,970 miles with a C1-D class of plane, aiming to reach his destination in 30 hours.

The annual AirVenture convention is considered one of the world's largest gatherings of recreational aviators. It draws more than 600,000 people and 10,000 planes from around the world. The weeklong event ends today.