Here is one side of our exhaust system. We didn't go straight back with the mufflers like the plans said because we were talking with Bob Windt and he said that the exhaust hits the blades of the prop and makes funny sounds so we did it this way with some flexible exhaust pipe and pointed the mufflers under the duct support fins.

Here is a view through the thrust duct.

In this picture you can see both sides of the exhaust. We thought about putting chrome exhaust stacks on it instead but it would have been too expensive and added some more weight, but it would have looked cool, LOL. Go back to my main UH-18sp page.