Penn Engine Coupler Knuckle

This coupler is loosely based on the Penn pivoted pilot coupler illustrated in the 1912 Locomotive Dictionary/cyclopedia.  The shank is configured to mate with a short pocket on the pilot beam of a locomotive.  The locking pin is not included because it is too thin for printing in steel.   Contact me for a  drawing of the locking pin.

The knuckle pin hole is cast undersize to allow easier printing of this model.   The prototype pin was 1.375" diameter.   Drill the hole to this size in your scale and machine a simple pin to mount the knuckle.  The split extended boss at the bottom is for a cotter to hold the pin down.