I know the minimum clearance per the FAR is 1 inch between propeller tip and structure, but looking for experience with what is desirable. Minimizing the clearance is good for my design to allow a larger diameter boom, but I’m concerned with vibration at that location. Any better guidance on clearance to avoid excessive vibration and fatigue at that location, beyond the minimum due to engine shifting?
I’ve been searching here and elsewhere without much luck.
I’ve been searching here and elsewhere without much luck.