After enjoying 26mm reduced diameter grip on my smaller wave boom, I have been looking at options to replace my enigma slalom with a smaller grip diameter.
Ideally I need 170 to 220 range with adjustable outhaul and wide tail
I'm after ideas options available. What do people think of RDG in a V grip. I have seen some brands with wide tail but no pulleys for ADJ outhaul.
Has anyone added a 2 pulley system to a wide tail for adjustable outhaul. Eg bolted on from a yacht shop.
Thanks for any suggestions.
Select to expand quotedkeating said..
After enjoying 26mm reduced diameter grip on my smaller wave boom, I have been looking at options to replace my enigma slalom with a smaller grip diameter.
Ideally I need 170 to 220 range with adjustable outhaul and wide tail
I'm after ideas options available. What do people think of RDG in a V grip. I have seen some brands with wide tail but no pulleys for ADJ outhaul.
Has anyone added a 2 pulley system to a wide tail for adjustable outhaul. Eg bolted on from a yacht shop.
Thanks for any suggestions.
Yes, I'll post some pics tonight Dale
Thanks Kato looks simple enough with minimal damage or weakening of boom. Im thinking there's probably several ways and types of pulleys to set this up. My current Enigma has 2 slightly larger straight round pulleys but a perspex plate sitting over the top to stop the rope jumping out, but your silver pulleys have their own retaining system and assume swivel to the angle of pull. Do the black pulleys on the outside make much difference or do you think the silver ones would work on there own.
The black pullies put all the rope on the outside of the boom , so no hooking up on the sail.
Select to expand quotekato said..
The black pullies put all the rope on the outside of the boom , so no hooking up on the sail.
Kato, I dont understand the way you have this set up. From the photos it looks like you are applying a 2:1 purchase to a 1:2 purchase, so the net benefit is zero. It looks to me like you could run a direct line from the 90 degree turning block to the cleat and end up with the same purchase, but with less friction. Am I misunderstanding something?
Select to expand quotePacey said..kato said..
The black pullies put all the rope on the outside of the boom , so no hooking up on the sail.
Kato, I dont understand the way you have this set up. From the photos it looks like you are applying a 2:1 purchase to a 1:2 purchase, so the net benefit is zero. It looks to me like you could run a direct line from the 90 degree turning block to the cleat and end up with the same purchase, but with less friction. Am I misunderstanding something?
I think I get what you mean, the advantages are that I can shorten /lengthen the ropes easily and get the sail just right. When going broad it's just flick off the outhaul and it's a perfect set. As to the pully ratio , it just worked better this way with the stuff that I had 
Overall for a compromise between pull force and length of pull, you need 8:1. I have tried 4:1. You can't pull a 4:1 on the water. I have tried 16:1. You get far too much line length at 16:1. So, 8:1 is the best.
The clew grommet itself acts as a pulley and provides 2:1.
(Each pulley next to the clew grommet provides no force multiplication. Those pulleys on the outside are there to keep the line away from the sail. I don't use those, but many people do, especially for wide tailed booms.)
A pulley on the outhaul line on the boom provides 2:1.
A second "pulley" on the outhaul line on the boom provides 2:1.
2 x 2 x 2 = 8
I use the Sailworks system that has both a pulley AND a buckle on the boom. Each provides a 2:1.
If you are wondering about whether you are getting the 8:1 ratio, just measure it. Between tight and loose, measure the distance that the clew grommet moves, say, 2 inches. Then measure how far the boom strap moves in your hand. It will be 16 inches.
NP race boom with internal outhaul. I have been using mine for a few sessions and really like it. Narrow grip & wide at the extension insert. 175-215. Nice and wide for my twin cam sails. I was using NP X9 160-220.
All my sails are outfitted with 1 micro Ronstan pulley shackled to the end of the clew on the sail. I run one cleat that mounts to the boom that I run the outhaul through. Works like a charm!
I use the exact same pulleys on 4 not-wide-tailed carbon booms. They have been going strong for years.
