The load that I would be concerned about for a spin halyard is after the chute fills, not when it’s being hoisted. On my boat (a 42), if the chute fills while being hoisted and it’s not immediately put on a winch, the mast person is in trouble (and better be wearing gloves). I assume that tidying up occurs once the chute’s filled, so the parking cleat would need to be sufficiently robust.
According to C&C specs, the square area of 100% foretriangle on my boat is 868.4 square feet. Add 50% for the No. 1 genoa. I don’t trust myself to accurately calculate loads like this, so I rely on the professionals at Rigging Only (where I buy my lines). For certain things, their prices are not too much different than Defender, and I get their valuable expertise. From: Dennis C. via CnC-List Sent: Sunday, December 18, 2016 5:46 PM To: CnClist Cc: Dennis C. Subject: Stus-List Spin Halyard Parking Cleat My suggestion about the spin halyard parking cleat was to stimulate ideas for holding a halyard on the mast. In my opinion, the best solution for the original post is still a rope clutch. The parking cleat is simply that. A fitting to "park" a halyard "temporarily" while the crew tidies up and the pit person can remove the slack and "permanently" stop the halyard with a cabin top rope clutch. It is designed to release when tensioned from the pit. Remember, the spin halyard is hoisted by hand. The load can't be huge because the mast person wouldn't be able to hoist it. Jib halyards are more likely tensioned by a cabin top or mast mounted winch, not by hand. Thus they probably have more load. Genoa and main sheet loads can be calculated here: http://www.harken.com/Calculators/ Although no halyard load calculator was found, I found a reference to a Harken rep's reply to a sailor that they use 90-100% of clew load for halyards. Just as an example, a 300 sq. ft. genoa will generate 520 pounds of load in 20 knots of breeze. That exceeds the 300 lb spec of a Harken 150 cam cleat. Again, a spin parking block and a system to stop a genoa halyard are different uses. A bracket for a larger cam cleat for higher loads might not be that difficult to make. However, it will still be limited by the working load of the cam cleat and the shear strength of the fasteners. Dennis C. -------------------------------------------------------------------------------- _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
