In 2015 I managed to make a nasty hole in the forward edge of my starboard keel. While I was repairing that I noticed a lot of fluid coming out of the keel. I thought I’d make some more exploratory holes to see if there was a more general problem. Here’s the plan.
Tammy stands on her keels on some wooden boards, which are on the “ribs” of a trailer. You can just about see that in this picture.
It might be easier to show you this sketch.
My plan is this:
- Drill exploratory keel drain hole under starboard keel.
- Drill several keel drain holes.
- Drill large holes in trailer keel boards around drain holes using a hole saw.
- Investigate keel material and consider inserting collars to attach keel shoes.
- Inspect keel drain holes at intervals.
- Fill keel drain holes with thickened epoxy.
- Finish keel drain holes and make good.
It’s pretty simple, but I’d welcome any thoughts from my readers.
There are a couple of related projects though. One is to open up and inspect the voids in the upper parts of the keels from inside the boat. My keels are glassed over (as are most, if a recent Facebook thread is to be believed) but there are likely quite big voids in there, as shown by Nathan Whitworth on his sadly defunct blog, “On Kudu”. A picture is still visible in on the Unified Corribee Website:
So I plan to drill a hole of about 8mm into the top of each keel and have a look inside using my dad’s endoscope. Are they full of water? I bet they’re at least damp. Depending on what I find I might open them up further. Some Corribee owners have managed to get 60 litre water tanks in each keel. That sounds like an improvement worth having.
There’s also this curious diagram from The Corribee Manual, reproduced from a 1977 newsletter entry by Roderic Wiggins.
I welcome your thoughts.
Meanwhile, pictures will go up in the Flickr album “Tammy Norie keel draining”.