Jib Sheet Routing and thingypit Engine Hatch queries Jun 23, 2010 23:44:22 GMT 10
Post by sharsp on Jun 23, 2010 23:44:22 GMT 10
Am making progress with my ship Omega as I continue to resurrect her from dilapidation and the neglect of her previous owner.
I have just finished moving my main jib winches to the top of the cabin so I can fit new Harken self tailing radials in the interest of single handed sailing but I am scratching my head regarding the routing of the jib sheets to the new winches.
My problem lies in what I think is a poor location (design) of the main winches combined with the limitations imposed by Harken (and I assume most other winch manufacturers) on the correct fitment of their winches.
Harken requires a sheet entry angle of 8deg +- 2deg (from below the winch) to avoid sheets overrunning and becoming tangled; which makes a lot of sense when you look at how the sheet winds onto the drum and is why I assume other winch manufacturers would also like to see some sort of low sheet entry angle. I did have sheets overrun each other with the original setup with an entry angle of less than 8 degrees.
These requirements clash head on with where the Holland designer/builder has positioned the original winches. They are located on the cokpit seating and in such a way that the jib sheets cannot run directly from the jib sheet cars to the winch, the fiberglass coping blocks the line of sight of the sheet and so a block further sternward is needed to take the jib sheet over the lowest part (near the stern) of the coping and back to the winch. Every other boat I have seen has their winches mounted on or beyond the coping where line of sight exists between the genoa car and the winch. Why was the Holland made this way?
I am currently moored next to another dilapidated H25 and it has the same problem but because the jib sheet routing (and associated tackle) on both boats is different (home made?!) I am unsure what the factory setup was. (What is on your boat?) It feels as though the boat was built and then someone said 'whoops, forgot to make a home for the jib winches so lets just put them in the middle of the thingypit seating!
If I keep the winches in their current position I require a winch riser of approx 90-100mm under my new winches to allow a sheet entry angle as required by Harken! This is going to look absurd as the winches sit proud (200mm top to bottom) out of the thingypit seating!
As I am trying to avoid having this winch & base towering out of the seating area, the only solution I can think of is to move the winches closer to the coping with a riser attached to the top of the coping and a leg bolted to the thingypit seat so that there is line of sight for the jib sheet and so stern routing block is not required.
Any of your thoughts appreciated?
What system is employed on your ships?
I am also needing to waterproof the engine access hatch in the thingypit floor. While being a fantastic way of accessing the rear of the engine, Without waterproofing my ship will one day sink! I would like to find a solution to keep the hatch working as intended so sealing without sealing permanently. There was remnants of the original(?) rubber mating surfaces but was in such poor condition that I cant even offer a sample to aid in finding a replacement.
Again kind folk, what is working on your boats?
Thanks in advance.