I could definitely tell about the flaps. It has been about 2 years since I actually took an Aeronautical Engineering class so I don't remember the specs anymore. I wonder if they cleared them to run any faster than normal seeing as they were flying over the city at a pretty low altitude
Airshows usually have waivers on speed. The P-51 can hall ass when pushed. It is hard to tell the my have the flaps at the first setting or the P-51 is pushing some boost.
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2004 Cobra, Whipple ,TH-400
Burning Corn
9.97 - 135.5