The title of this post is a bit inaccurate, since I did no construction today at all. But I did bring the Hebridean frame, vane, and mount bearing to Tammy Norie and worked out how they will fit.
The first job was simply to locate a good position for the Hebridean on the stern. This was quite easy. As you can see from this picture, the Hebridean looks made for the boat, with its trunk angle nicely matching the top angle of the transom.
There’s plenty of clearance all around, but the end of the pivot pin (resting on my toes) is just outside the boat. The mount bearing will sit here.
It will be sandwiched between two planks which will be fastened to the boat. After a bit of thought, it’s clear that I should cut planks that are bolted down to the top of the transom, on the 80mm-wide flat part of the deck, but then are shaped to rest on the top slope of the transom to bear load. This will keep the mount clear of the stern lockers and anything else going on in the cockpit. I’ll make a proper diagram later and share it.
I also checked how the Hebridean will act when it swings. I have yet to determine the correct length for the outriggers, and it’s not clear how I can do that before mounting and rigging the whole thing. There will be pulleys suspended from the stern rail taking lines from the outriggers to the tiller. At the angle shown in the photo below the outrigger is exceeding the height of the rail, and that means the gear will stop working. I wonder if it will have enough movement.
One possible refinement is that the Coromandel’s tiller could be adapted to be reversible.
Here you can see the tiller when vertical. By making the bottom bolt removable (using an anchor pin, for example) the reinforcing the top link, the tiller will swing back over the stern lockers. This would allow the Hebridean to connect without the usual cross-over of its lines, and also mean that the cockpit is clear then using the self-steering.
Anyway, I now have enough measurements to determine the correct length for the pendulum.
The rest of the day was taken up with a wonderful sail from Warsash to Fareham with my friend Gareth and his nephew and niece, Kyle (12) and Cara (10), neither of whom had been sailing before. I’ll let the Met Office tell you about the weather:
Selsey Bill to Lyme Regis – Strong winds are forecast
24 hour forecast: West or southwest 6 to gale 8, occasionally 5 later. Moderate or rough. Mainly fair. Good.
We came out of the Hamble and messed around in Southampton Water for a while. The winds were strong, but it was also sunny and warm. The others weren’t due back until the late afternoon so we decided to take Tammy home to Fareham. It was a delightful run before a force 7 in 1m seas, and once again we had the Solent to ourselves.
I also got to measure the distance from Tammy’s stern deck to the stern wave (about 310mm) while doing 6 knots in front of a force 7. That’s probably a good working figure for the Hebridean.
I will be sailing again tomorrow, and then I will need to return to work for a few days, so construction may be suspended for a short while.