Ah, Bob Hoovers airplane. He flew the cahse plane when Yeager broke the sound barrier. If they had known C.Y. had bad ribs, Hoover would have been in the Other plane!
Hoover was at Reno flying the overhead safety plane when Stu Eberhardt, in Merlin's Magic had the trim tab break out of his rudder. That same day Hoover taxied into a pick-up truck on the tarmac, slicing the cab like a loaf of bread, which made his plane un-airworthy. Hoover gave his rudder to Stu so he could race the final race of the day, thus when Stu had a new rudder built for MM, he painted it yellow, and still is yellow.