Hello Almighty helpful people...
I have a list of questions that I need answering and everyone at my flying field is usually too busy for me to ask them. So, I will ask the invisible people, because you all are much more helpful! : )

First question: I have an MVVS 61 with a sort-of tuned pipe. I actually know nothing about pipes, but it looks like a butane fluid tube with a pressure tap and an exit. This engine has a lot less power than my Tower Hobbis 61, which lends me to wonder what I am doing wrong. If it is the pipe that is causing it to slow down, where can I get a regular muffler for less than my total personal worth? Also, what size prop should I be using on this?

Second Question: I have a Super Tigre 91 that has a J'Tec muffler, pitts style, I think. This engine must hate me. I am convinced of this because it never does the same thing twice. I can, however, tell you what it does the most. It just dies. There are no signs leading up to the ceasing of combustion, only the vast silence that follows. It usually dies just after tuning it on the ground, right before flight...OR...when it is flying and I reduce and then add throttle. So, here is a breakdown of this engine and its mishaps: When I am flying it at level attitude and I throttle down for a touch and go, it is fine. However, when I go to take back off, it will run for about five seconds (just enough for it to make for a sketchy landing) and then die. That is, if I make it into the air. It also dies on me when I am tuning it on the ground, richening it or leaning it for daily variations in temperature. After I tune it, hold it nose high for lean out checks, do the pinch test and other ground like stuff, I will taxi it out to the runway and right before I take off, it will die. SEE, I told you it hated me! What am I doing worng on this engine?

Now, both engines are run on the same fuel. It is Cool Power 10% nitro. The MVVS is swinging an 11x6 prop and the Super Tigre is swinging a 13x6. I originally had a 14x6 on the Super Tigre, but the manual says that I over propped it and I thought it was over heating. I am using OS #3's or #8 plugs, I can't remember which, but I am at about 3 feet above sea level here in Florida, so that is what I was told to use.

Can anyone out there in the RC universe help me? I am so frustrated over these two engines I just want to scream. All of my other engines are about the same, so I expect I am doing whatever I am doing to all of them. With the exception of my new Evolution 61 which I love because it runs sooooooooooooo good. I will buy another Evolution engine just because of this one. Thank you all in advance. Thank you very much for your help...God knows I need it! : )


Red