John continued fabricating two Dutchmen blanks for his stem repair, so here is an update on the initial report uploaded a few hours ago.
As he details here, the blanks will be temporarily screwed in place so that, using a belt sander, he can shape and sand in the two blanks so they are fair with the rest of the stem and knee.
What a nice way to end the week! John has continued working on the Dutchman repair to the 1953 Shepherd’s stem. I hope you will agree as you view this clip that he’s made some solid progress. We filled the cavities around the original carriage bolts with Jamestown Distributors Thixo Thickened Epoxy, which we will allow to cure over the weekend.
Then John will use the same adhesive to bond the stem and knee components of this Dutchman repair to the native surfaces, securing them temporarily in place with wood screws. 3M 5200 will be applied on the two elements’ joining faces.
Once the adhesive has cured and the screws have been removed, John will complete his final sanding-in process and drill new carriage bolt holes from the inside out.
Yes, surfaces will be sealed with CPES prior to being glued in place.
We are doing a Dutchman repair workshop this Saturday, and hope to have some interesting content uploaded next week.
Our January 24, 2015 workshop included a clinic led by John La Fountain on using a Dutchman for repairing the stem of 1953 Shepherd 22’ utility we are preserving.
Following is the handout he prepared and distributed to workshop participants.
Inspect stem and knee to determine if a Dutchman can solve the rotting and grain separation issues where the stem and knee meet.
Remove the bad part by cutting away any rot or split-out wood. a. Always cut the top at an upward angle relative to the leading edge of the stem so that water runs off the Dutchman, not down inside it.
Make a template using cardboard.
Locate a straight-grained, clear piece of white oak – usually 8/4, as it was here. (Be sure to wear heavy gloves!) a. Using a band saw, rough-out the mating surfaces between the Dutchman and stem or knee, after transferring the templates to the blocks of wood. b. Rough out the abutting faces of the two Dutchmen.
Sand the Dutchmen to shape
Re-fasten the leading ends of the planking – or strakes in a lapstrake hull – bedded in 3M 5200.
Repair any rot, cracks or over-sized holes with TotalBoat Thixo Thickened Epoxy adhesive now. (The above-waterline seams will be affixed with TotalBoat Wood Epoxy System.)
Once epoxy has cured, do a final sanding and shaping of both Dutchmen and the surfaces they will mate to on the stem and knee.
After a final check for fit, some final sanding, fit the Dutchmen in place and one fastener pilot hole into each.
Glaze both surfaces with TotalBoat Thixo, and the abutting surfaces with 3M 5200, and fasten them in place with fasteners passing through the pilot holes.
Wait 24-48 hours.
Drill the carriage bolt holes from the inside of the stem and knew out, and insert silicon bronze carriage bolts – 4 in the case of the Shepherd.
Green Mountain Buoy “bumped” into something at some point that left an ugly gouge – almost 3 inches by 1 inch by 3/8 inch deep about mid-way along her port side. Using a plunge router, we were able to create an purposely irregular shape that would be filled with what is called a Dutchman patch – a piece of wood that is shaped and shaped until it fits precisely into the declivity we have created with the router.
Fitting the Dutchman perfectly would have been much easier had we simply routed out a uniform rectangle with straight sides and 90-degree corners. But such a patch would be virtually impossible to hide.Selecting a piece of planking that had been removed from the topsides for replacing allowed us to select wood of the same age and similar grain and coloring characteristics, which is a great strategy for hiding the patch even further.
Here we follow John LaFountain as he first patiently shapes the insert, glues it in place and then sends it in a day later once the Gorilla glue has cured.
Yes, the patch IS still visible at the end of the clip, but once we have bleached, stained and varnished Green Mountain Buoy, I will challenge you to find the Dutchman.