Harold Neumann, winner of the 1935 Thompson Trophy, performed aerobatics and even competed well into his 80's. "Bite" Livingston, brother to the famous Johnny Livingston, flew into his 90's. Bite was neat because he showed me his original pilots license that was signed by Orville Wright. My first ride behind an OX5 engine came from a guy that was 85 in a Travel Air 2000 that had flown with Benny Howard back when Howard was in Houston prior to building race planes. Those old guys do alright.