Installing the Schaefer Snapfurl 500 / pinning stick
Below: The pinning stick is attached to the adapter plate and then the hook at the bottom of the pinning stick is attached to a hole drilled in the anchor roller bracket. The lever is then rotated forward bringing the adapter mounting hole in line with the forestay chain plate.
Below: Distance between pins on the adapter is 2.0 inch
Below: Adapter plates allow a few degrees of swivel side to side
110 Jib/Genoa forward visibility with the furler drum raised by 2 inches due to the adapter.
Below: The Schaefer Snapfurl 500 has an external halyard which will keep the mast up if the forestay fails at the top. The halyard also allows tensioning the jib independent of the forestay.
Caution must also be taken to insure that the halyard will not wrap on the furler.
Below: The forestay must have the toggle / swivel function in two dimensions to insure that any bending of the forestay does not create a point load.
Picture updates 5/15/2105 (with new forestay turnbuckle (5/16 pin)
The pinning stick is only permanently connected at one end. This end also has a hook. The pinning stick can be removed from the adapter by simply opening it up as shown below.
The rope at the handle end keeps the stick captive to the adapter. If you trailer sailed just one day (rig and unrig the mast), you might just leave the stick attached and sitting on deck and held together by the rope on the handle end..
Every time there is a "joint" between rigid parts in the forestay, there should be a toggle. If the furler drum is pinned directly to the deck tang, the toggle in the turnbuckle is sufficient. But if a rigid extension is added such as either the adapter shown here or for example a Johnson lever, an additional toggle needs to be added to the bottom of the adapter and the deck pinning tang.
The "toggle" action of the adapter is done in a unique manner
The rev 6 adapter allows some "rotation" similar to what a conventional toggle allows. The deflection angle that the adapter allows is limited but it should be more than adequate. When pinned, the two pieces of the adapter are only held by the top 5/16 inch diameter pin and the bottom 5/16 pin. The holes are drilled slightly larger than 5/16 (11/32) and the two pieces of the adapter can slide past each other since they are not attached. This is what allows the adapter a degree of freedom to rotate just like a toggle would.
The metal in the two toggle parts is 1/8 by 1 inch wide stainless Steel (don't know which exact type)
All three holes in the adapter are 11/32. The two outer holes are exactly 2 inches apart.
The two pictures below show the over 5 inch of travel.
Block kicked around to see if any odd things happen with the adapter under a "dynamic" load, seems fine..