Quote:
Originally Posted by anthony11
I'm not sure I follow what you're saying here. Are you saying that as the boom flips to the other side one should uncleat the sheet and hang onto it to stop it manually at the desired position, to ostensibly lessen the jolt as it stops on the new leeward side?
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That's pretty much it. I try to release the mainsheet
cleat as the main flips through, and then try to ease the sheet back out in a controlled manner to the new jibe trim. On a windy day the load can be considerable, esp, as I said, with marginal mainsheet tackle, and if you try to let the rope run through your hands things can heat up in a hurry. In extreme cases, even if you try to grab the sheet it will run through your hands. Sailing gloves don't always fully protect the hand from rope burn. The advantage of, say, a 6 part sheet is that the sheet moves through more slowly however there's a lot more
line to have to handle.
Having the sheet "jolt", as you say,and bring the main up short in a good breeze can really kick the boat around when you need it least, and the still-cleated main is now under serious load and may be difficult to release. All of this really speaks to spending money on good quality, adequate gear on such an important control.
Quote:
Originally Posted by anthony11
I did a bit of googling and don't quite understand how these racket blocks work.
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A ratchet block sheave has flats on it (basically a hex or octagon) and a ratchet mechanisim that rolls freely on one direction and stops in the other. As you sheet in the block offers no resistance, but as you ease the sheet out the ratchet (if engaged) comes into play, freezes the sheave and the
line must "drag" its way past the flats on it. This resists the load (much like having a wrap or two around a
winch) and makes it much easier to handle the load by hand. Generally there is a switch on the block so you can free the ratchet up if you don't need it in light air. They "click" audibly in the free running direction when engaged.
Ratchets are available on stand-alone blocks, and/or as part of the main block/cleat assembly typical on traveller mounted mainsheets.