Adequate Testing
Given the description of the 1998 event, I wonder if there's adequate testing of these aircraft after modifications have been made to the airframes. Given that the purpose of the mods is to increase airspeeds at low race altitudes (i.e. dense air), surely flutter testing would have to be part of ANY test regime following these modifications. Surely this testing needs to be completed prior to ANY racing in front of grandstands.
I apologize if this has been asked and answered already, but do we know if any significant modifications were made to this P-51 just prior to this race?