The Naiad Voyages

Mark Austen

2016.07.24 - Ribs in the Early Morning

I really wanted to get the half ribs finished and, if possible, to set the outer framework for the bunks and stowage. That meant an early start to the day in the cool morning air. Hopefully the afternoon heat will make the epoxy cure enough to be able to do some more work later this afternoon. The screws will need to be removed and the holes filled as well as the outer stringers for the bunks cut and fitted. A stringer, by the way, is "a longitudinal structural piece in a framework, especially that of a ship or aircraft".

So now you know.

Given my level of carpentry this project probably would not be possible without epoxy. As Charles Stock mentioned in "Sailing Just for Fun" page 24, "Clodhopper carpentry had arrived just in time". He used Aerofix glue and Mendix filler but the principle is the same.

I like to think that Charles would have been happy to hear about my project.

The heads of the screws clamping the laminates in place were prevented from pulling through the hull by the use of small pads of hardwood as you can see from the photo. I reluctantly drilled the holes through the hull but I don't want the screws to damage the hull any more that this.


Fortunately it is only nine screws per side.


The laminated ribs have been removed from the hull and are ready to be run through the thickness planer to remove the excess epoxy and any high spots.


These ribs were then epoxied to the hull using screws to hold the ribs in place. Where necessary the inside blocks were also used, however, since there is little force required to hold the rib to the hull as the ribs are the correct shape, the blocks were only used where the screw did not bite in the existing holes in the ribs.


An epoxy fillet was added to both sides of each rib, you can see some of these in this photo. I was also able to fill in the two splits in the ribs where one of the laminates had given way under the pressure of the clamping.


As was mentioned above, there is little pressure required to hold the ribs in place, so the hardwood pads protecting the hull on the outside was not necessary for this stage.