Ed 143 Posted April 24, 2020 Share Posted April 24, 2020 I'm currently using a proper block for my 2:1 haylard, but would appreciate a bit more hoist height Arrangement at the moment is a plain bearing 1000kg SWL selden block, with the shackle going onto the top of the main te 8.5 class is airdraft limited so any gains in hoist height are a win. Looked at the offering from Tylaska, wichard, and Selden, any group experience with these? they llok nice but price wise they are up there for a shacke Halyard is 8mm (inc cover) dyneema type rope, suggestions,comments? Quote Link to post Share on other sites
ex TL systems 63 Posted April 24, 2020 Share Posted April 24, 2020 Can you just soft shackle it on with dyneema Quote Link to post Share on other sites
Ed 143 Posted April 24, 2020 Author Share Posted April 24, 2020 sorry don't understand, soft shackle what onto what? Quote Link to post Share on other sites
Deep Purple 511 Posted April 24, 2020 Share Posted April 24, 2020 Sundreamer originally had a large double plate headboard with a drop in sheave. With the next sail we butchered a block, Then just a block which isn't great Quote Link to post Share on other sites
ex TL systems 63 Posted April 24, 2020 Share Posted April 24, 2020 I meant soft shackle the block to the headboard to get it closer. But like the others have said I think something like a snap block fixed to the headboard with the top of the block level or below the top of the sail would allow maximum hoist. ? Quote Link to post Share on other sites
Bradz 18 Posted April 24, 2020 Share Posted April 24, 2020 Our Vote would be Tylaska we currently have the non sheave version. Never had an issue with it. 2 Quote Link to post Share on other sites
Shane B 2 Posted April 24, 2020 Share Posted April 24, 2020 Ed on Charleston just we used a homade setup like the attached pic, of course to get max hoist you need a rebate in the head board, on the new boat I am useing a simple soft whichard block. https://marine.wichard.com/fiche-A|WICHARD|21104-0201010000000000-ME.html Quote Link to post Share on other sites
Deep Purple 511 Posted April 24, 2020 Share Posted April 24, 2020 New boat..........? Quote Link to post Share on other sites
Ex Machina 365 Posted April 24, 2020 Share Posted April 24, 2020 ^^^^ ! Quote Link to post Share on other sites
armchairadmiral 411 Posted April 24, 2020 Share Posted April 24, 2020 I've heard a few explanations of the need for 2:1 main halyard systems. Apart from ease of hoisting can one of you experts ( e.g. KM or Wheels )explain just how it allegedly affects the compression on the mast. Seems to me that no matter what system there are two attachment points ,top and bottom of mast, so the only effect is miles more halyard to buy and stow ? But round the bar others say it reduces compression ? How ? Quote Link to post Share on other sites
Black Panther 1,584 Posted April 24, 2020 Share Posted April 24, 2020 I thought the reason was to make it easier for an old gitto pull the sail up. Nothing to do with compression. Am i wrong? Quote Link to post Share on other sites
Clipper 343 Posted April 24, 2020 Share Posted April 24, 2020 1 hour ago, Knot Me... maybe said: All 2:1 halyards I've used and seen terminate on the masthead fitting. The mainsail on SV Hypothetical takes 50kg of load to hold it up there in just the shape the crew are happy with. If that 50kg is on a 1:1 halyard it is on one sheave and the that sheave is handling the 50kg. The masthead fitting, containing the loaded sheave, is now applying 50kg of force downwards. If that 50kg is on a 2:1 halyard then the sheave now has only 25kg on it but the tang where the end of the halyard is terminated has the other 25kg, between the 2 they share the 50kg load required. The masthead fitting is now applying 25kg x 2 of force downwards. Dont think thats right? Bit worried to have a go at this, but in the 1:1 case, the sail applies a 50kg load down, the halyard the same vaule to hold it up there, therefore masthead has 100kg of compression. In the 2:1 case, the load required in the halyard becomes 25kg each side of the main, and another 25kg tension, so maybe 75kg compression? Im ssure ScottiE or Ed will correct me if Im wrong. 3 Quote Link to post Share on other sites
Sudden5869 17 Posted April 25, 2020 Share Posted April 25, 2020 3 hours ago, Knot Me... maybe said: A soft shackle with attached LF eye for use in 2:1 halyards. Exactly Knot Me We run this sort of arrangement on the main for Oliver Sudden, Young 10/34. A fairly large square top. Made the Soft Shackle as small as possible to ensure full hoist. The 2:1 is fantastic. Easier to hoist and reduced any clutch slippage. Only downside is the mass of rope when hoisted. Quote Link to post Share on other sites
Bad Kitty 252 Posted April 25, 2020 Share Posted April 25, 2020 We use something like this on Bad Kitty, works well & keeps the length of the 2:1 down. Not sure which flavour ours is, refer to Bart at NZ Rigging, came from him. Quote Link to post Share on other sites
Clipper 343 Posted April 25, 2020 Share Posted April 25, 2020 looks like the ones equiplight makes? Quote Link to post Share on other sites
Island Time 1,235 Posted April 25, 2020 Share Posted April 25, 2020 6 hours ago, Black Panther said: I thought the reason was to make it easier for an old gitto pull the sail up. Nothing to do with compression. Am i wrong? Yep. See this old thread for details.... Quote Link to post Share on other sites
Bradz 18 Posted April 25, 2020 Share Posted April 25, 2020 1 hour ago, Island Time said: Yep. See this old thread for details.... I'd like to see al the pics/diagrams from this thread Need some light hearted Saturday night reading. Quote Link to post Share on other sites
Ed 143 Posted April 25, 2020 Author Share Posted April 25, 2020 The equiplite stuff is nice but makes tylaska look cheap! I think the friction ring and soft shackle is going to be the way for now, just gotta sort out how to tie the shackle Quote Link to post Share on other sites
Island Time 1,235 Posted April 25, 2020 Share Posted April 25, 2020 23 minutes ago, Bradz said: I'd like to see al the pics/diagrams from this thread Need some light hearted Saturday night reading. Sorry, gone in the old system. Not retrievable. Quote Link to post Share on other sites
Bradz 18 Posted April 25, 2020 Share Posted April 25, 2020 29 minutes ago, Ed said: The equiplite stuff is nice but makes tylaska look cheap! I think the friction ring and soft shackle is going to be the way for now, just gotta sort out how to tie the shackle Problem you need to consider with the soft shakle option Ed, is the tolerance you have above the headboard to the crane. I have know those who tie a bowline from a friction ring, down side is its never going to be a constant for luff tension. Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.