Quote Originally Posted by efwd View Post
I'm not sure of the weight but John McBean told me that the heaviest engine they have installed on the Series 7 was the Rotec 7 cylinder radial. That was three or four years ago. Since then they have installed the 915 as well as another larger engine on the STI plane. I don't recall what engine it was. I was at the factory at the time that engine was in a crate. 180hp if Im not mistaken. A guy had his KFS7 at Oshkosh last week that had a 9 cylinder Rotec.
I believe you were thinking of the O-340... The videos of John flying it looked pretty good 👍🏻