I saw the Le Zebre run at Prescott in 2019. Yes, it is a Curtiss OX-5 which has some interest for me as I have a friend here with a Velie which has the same motor. If you look at the valve train, you can see it is rather unusual. Exposed cam shaft in the center of the V and the intake pushrods outside of the exhaust pushrods. Not a very good aircraft engine, but a bit better in a car. Nice to see Mark Walker's Darracq back running after it tossed a piston several years ago.
Erich in Mukilteo
Erich in Mukilteo