The P-51 aircraft, The Galloping Ghost, was flying the fastest it had ever flown on the Reno course since the plane had been modified in 2009, the safety board said.

CNN: NTSB: Pilot overwhelmed by g-forces in Reno crash

Foremost among the recommendations: the safety board said all of the unlimited class aircraft like the P-51 Mustang should be made to demonstrate their airworthiness at racing speeds before participating in a public air race.

CNN: NTSB: Pilot overwhelmed by g-forces in Reno crash

Washington (CNN) -- The pilot of the P-51 Mustang that crashed at the Reno Air Races last September experienced overwhelming g-forces at the outset of the incident, and likely was incapacitated almost instantly, the National Transportation Safety Board said Tuesday.

CNN: NTSB: Pilot overwhelmed by g-forces in Reno crash