Rig Tension

SO looking at the tuning guides for the Mirror. Using the P&B guide for the Bermudan mast it says use 160lbs of rig tension. I pulled on around 140lbs and did not want to go any further. As it was the shrouds would give off a high pitched ping when plucked and I had the mast rake correct. Given the boat is a 1986 Bell built boat I did not want to over do it on the fittings. So is 160lbs really what would be required?

Thanks

On an old Mirror, the most likely thing to break with too much rig tension is the shroud plate, which are often screwed into wood which is slowly rotting, and certainly wet. Once you have checked these are OK, 160lbs should be OK. Worth checking the sheerline isn't distorting.

Have to say, though, that I doubt it will make a huge amount of difference to the speed, putting the extra tension on. Mast rake much more important.

Originally posted by Rupert On an old Mirror, the most likely thing to break with too much rig tension is the shroud plate, which are often screwed into wood which is slowly rotting, and certainly wet. Once you have checked these are OK, 160lbs should be OK. Worth checking the sheerline isn't distorting. Have to say, though, that I doubt it will make a huge amount of difference to the speed, putting the extra tension on. Mast rake much more important.

I thought 3mm wire broke at a tonne?!Or is dyform different?

Never ceases to amaze me how much load can be taken by light structure as long as the structural arrangement is adequate and the reinforcement is applied correctly

The 3.5 mm Dyneema SK99 we have been tested averages at just under 1700kgs.