I also did a modification of my lower cowl for my 3 blade MT Prop.
I took a piece of fiberglass I had trimmed off the door window and made a replacement piece for the lower cowl cut out. The trimmed piece had a slight curve to it so I designed the cover to slide up under the front of the cowl. After I installed the piano hinges on both sides I then installed fiberglass over the part that slide under the cowl to bring the finished piece out level with the front end. I can remove one piano hinge safety screw, slide out the piano hinge pin on one side and flip the cover back up inside and then remove the lower cowl. Works like a dream and you can make the cut out as far forward as you desire. Also no drag created because the mod lays flush with the bottom of the cowl.
I took a piece of fiberglass I had trimmed off the door window and made a replacement piece for the lower cowl cut out. The trimmed piece had a slight curve to it so I designed the cover to slide up under the front of the cowl. After I installed the piano hinges on both sides I then installed fiberglass over the part that slide under the cowl to bring the finished piece out level with the front end. I can remove one piano hinge safety screw, slide out the piano hinge pin on one side and flip the cover back up inside and then remove the lower cowl. Works like a dream and you can make the cut out as far forward as you desire. Also no drag created because the mod lays flush with the bottom of the cowl.
