Originally Posted by 00Dan
Donít the current Vanís cowls also require an extension? I know my old fixed pitched Vanís cowl on my -4 requires a 4Ē extension, and I think the CS cowl required a 2.25Ē extension.
The standard kit supplied cowls are designed for use with the Hartzell compact hub propellers.
When a fixed pitch propeller is used instead, a 2.25" extension (actually spacer) is required.
Prior to developing a cowl designed for use with the Hartzell compact hub prop., the cowls required a 4" spacer be used with a fixed pitch prop, or the use of the extended hub version (approx. 1.75" longer than the compact hub) of the Hartzell propeller.