Hi guys, I am in the process of refitting an IOR 50 to go cruising across the pacific. Being an ex racer
she dosent have much in the way of cruising amenities and no provision for ground tackle apart from hauling the anchor
up from below and tossing it over the side.
I have to admit that i didnt find this forum untill after id already settled on a design and begun fabrication otherwise i might have cast around for opinion.. I struggled to find good information about the loads involved and details for the actual roller construction so in the end i might have over built it slightly. However i wanted this to be something we could have confidence in as ultimately the whole boat might be depending on it.
Complicating the design is the fact that the furling
unit sits very close to the deck
and the deck
itself falls away at an angle from about 18" from the bow. This meant the distance between the roller and its fixing to the deck would be quite long.
To simplify construction i used two L shaped alloy extrusions (the boat is alloy) in 1/2" which were trimmed and joined along one edge to form a U shape approx 41 x 4 x 6". The roller itself is machined from nylon with a profile that will allow a Rocna
33 to sit against it on the smallest diameter but will still roll 12mm chain over a 6" diameter. The roller turns on a stainless axle 15mm in diameter which sits directly in the alloy extrusions.
Here are some pics, comments are welcome but also i hope this will be a data point for anyone else who needs to have something custom fabricated. As mentioned, i think it is perhaps slightly overbuilt and i am thinking of adding some lightening holes as its bloody heavy!