Does anyone have any experience with closing up the hole in the nose of the cowl around the prop shaft and getting any better cooling or less cooling drag? My cowl has a 9 inch opening directly behind the spinner with a 1/4" gap between the spinner and the cowl. My cowl is setting in the garage right now with the resin curing on a 1/4" thick foam plug that I installed to fill the hole. I will cut a hole tomorrow for the prop shaft. Can I expect a noticeable difference in cooling drag or airflow through the cowl? Will I have to throttle back now in cruise to keep from exceeding redline? :-)
Larry Flesner
