If I remember correctly it was powered by a Wright Whirlwind (sp?) radial. What really caught my eye wasn't the name of the engine but the amount of oil that was dripping out of it. No kidding! I would bet that the plane hadn't been setting there more than 15 minutes and there was already a good puddle of oil on the ground. From what I'm told they haven't made that engine for many years but you can still order a plane with a reconditioned Wright installed. It would be interesting to see some of the planes that engine had been in during it's long life. OOhhh if it could only talk.
Keep those answers coming. I will say that it was over 50 mph. but less than 100. There is nothing sweeter than the sound of radial except maybe a 2 cylinder John Deere.
Chris in South Dakota