I probably shared this story before, so please forgive any repetitive preaching, but I lost a spinner in flight once. Lucky for me it was a fiberglass spinner on the front of an RV-3, and it was a wood propeller with less rotating mass than a metal prop. But it still shook the holy s**t out of the airplane and rather rudely stained a good pair of nice white underwear. The root cause of this was owner/operator stupidity and impatience, but (of greater relevance here) the immediate cause was not paying enough attention to a problem with one of the nut plates around the backplate flange.A note to others is to check the spinner flange on occasion for signs of fatigue. I lost a spinner during a high speed taxi test on a different airplane some years ago. The momentary vibration untill it departed the aircraft in a beautiful arc was astounding. Had the separation taken place in flight, it wouldn't have been so beautiful.
1000% agreed, that sheet metal intake scoop is pretty draggy looking. The exhaust pipe coming out at 80 degrees to the local airflow is not helping either. A couple of small aluminum fairings at the front/rear of the exhaust pipe would help, but shortening it and changing the angle would help more IMHO....also not sure if the picture is making that chin scoop look like its just a flat plate with a hole in it?
If its like that in real life, I'm betting a few hours and some foam/fiberglass would make a streamlined add on pitot inlet that would add 5 knots in drag reduction and add half an inch of MP.
Sorry for the late reply.It looks like you have several degrees downwards tilt in the engine. Is that true with the Tailwind or an illusion of the picture?