Thanks

I would agree the Yellow"s intake is smaller than the BVM. I figured BVM intake around 13.5 sq in and Yellow around 12 sq.in. Plus the BVM intake lip is designed to avoid a boundary layer separation, which I believe will avoid reducing the area of intake upon separation.

The original Dynamax owners manual states "at leaset 125% of the fan sweep area or between 20 and 30 sq. in". The neither models have that. I could open a cheater flap on the intake ducted. No one would see that either. We'll see how it works first without it.

However, the BVM has the larger of the two intakes, a smoother less angle change, no corner pockets as Yellows intake (Stumax suggests 15 degrees max of change in ducting) which results in less turbulence. The smaller intake in my experience will require a longer take off run which is ok. Once it gets "on step" I don't think I should have problems with performance..

Also the BVM is a lower drag airframe next to the Yellow. BVM has very thin wings, ( hence the flaps on both edges for around 16lbs auw.) H- stabs have razor sharp LE's and V-stab is razor sharp as well. I believe the Yellow to be more forgiving, however, the Yellow will also get LE flaps if its gets the turbine.The only draw back to the Yellow I have is that it is the early poly version.

But the most important reason I am using the power systems I have is because of cost. I purchased the dynemax at a very reasonable price. I've seen it work in the past, EDF will make it work better.

Thanks again.

Steve