Hi Reanaud,

I had a bifurcated pipe in my plane. I agree that it looks "smoother" but the negative points where too much. More noise (horrible sound) lost power, more heat in the airframe, more weight in the back of the plane. So all the positive nice looking did not compensate the negative things. But what makes it useless was the lost of speed!

On the 5th flight the engine lost its tail cone which stucks in one side of the pipe and generated so much heat that the frame was clos to get burned in flight. This gave me the feeling that a single tube is the better solution. For "Stand of scale" i can attach the middel "boom" so that it looks nice on the ground but its removed before flight.