ORIGINAL: JohnBuckner

In your first post you said this whole discussion was over getting the the engine entirely within the cowling, well this is not going to happen even with a 25 size engine much less the hot .40FX.

Doing what you suggested involves going full inverted and raising the thrust line vertically withing the cowl and even that is debatable. This is going add additional aerodynamic changes in the airplane and that is a terrible idea. You have not even considered the cutouts for the muffler. Finding a pitts or box muffler that will fit and be completely within without drastically changing the thrust line is not going to happen either.

If you use a stock muffler a simple tunnel can be added as in the pictures of one of mine agine not the same airplane but one with almost identical dimension and cowl shape.

John