Re: Trimming NACA duct aft edge
Floog, so you bubbled the paint on the UPPER cowl? I didn't think the exhaust headers were up that high. Or did you mean the upper part of the LOWER cowl?
I ran my engine several times on the ground at WOT to check static rpm after fussing with prop pitch (ground adj.) at around 5200-5300, but did not keep it at this hi speed for very long. That's probably why I got no paint blisters.
Did you have to repaint the cowl, or just a small patch?
Re: Trimming NACA duct aft edge
Another question Floog: I thought prop balance runs had to be with cowl off so you could mount the equipment-sensors etc.
Re: Trimming NACA duct aft edge
My bad, Jim. You are right: it bubbled on the UPPER part of the LOWER COWL. Only the upper cowl had to be removed for the prop balance. I sanded it out, touched up with a little Aerothane, and then wet sanded/polished. You can't see it anymore. Good catch, Jim!! Thanks.