I just read an article by Don Lowe (RCM July/Aug. 1965) where he discusses the development of his Phoenix. He states that his original Phoenix I (accidentally lost at the '63 Nats) and it's replacement, also a Phoenix I were powered by ST 46's. It's successor, the Phoenix II used a ST 56. Don's friend Ray Nugen who also developed a swept-wing design at this time called the "Expinkamental" also used the ST 56 for his prototypes. Cold hard facts here. Thought I'd share a couple of engines that I hadn't known about. Mark