I'm not trying to pick a fight either. New guys need help from those of us who have the experience to answer their questions. I usually don't have much time to surf the internet because I am working too hard trying to afford my addiction, I mean hobby, but sometimes I feel like pitching in. My buddy Vernon Montgomery and I have each flown ducted fans for over fifteen years. That is over 30 years combined experience (gee, we must be getting old) with Byron jets with Byron fans. We have had a total of 19 Byron d/f aircraft. A total of 24 OS .91 engines, and five Rossi .91 engines (the original Rossi .91, which was a fantastic engine). Only four of the OS engines had the big head. We NEVER had engines that showed any signs of running hot. This is literally after flights that number in the thousands between Vernon, myself, and my two sons, and we fly in the worst of conditions, i.e. we live in the HOT, humid, sunny South.

If you take time to learn how to adjust your engine, you won't have problems. Don't take time, and it won't matter what kind of head you have on it.

To Shaun and EASYTIGER. I am sure you have many years experience with Byron equipment. I am sorry your experience wasn't as good as mine.

Since $60 is peanuts in the jet community, get the big head. Then you will feel that you have done the best you can do.

Viper21 has the best solution: Go tubine

One thing is for sure, I LOVE America. We all have the right to voice our opinions, and can do so without getting shot!

Long live the Red, White, and Blue!!

'Nuff said,
Dennis Lott