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February 15, 2022 2 min read
The Laser has had many different configurations during its life, in recent years alongside the 8 to 1 downhaul system we have also seen more people switching out their 57mm ratchet block for a 40mm ratchet block.
The main reason is the thickness of the main sheet. Most Lasers have had in the past 8mm main sheets. The 8mm rope sat inside the sheave of a 57mm block and gives more friction therefore more grip. But in recent years around the boat park, you may have seen people using 6mm main sheet rope.
6mm lines like Kingfisher Evolution Sheet and Marlow Marstron are lighter and smaller creating less friction through your blocks, making your sailing easier. Therefore having more control over the main sheet in lighter winds and the sheet going out easier and quicker when gybing and starting the downwind leg.
The 57mm block is designed to work with lines up to 10mm and by having a 6mm line running through the block it will work fine but the block is not working at its peak performance.
The 40mm can also take up to 10mm rope but being narrower and shallower the sheave works very effectively with 6mm and 7mm ropes.
Another big advantage to having the 40mm ratchet block is, on a winder day when you have all your control lines pulled hard on and excess rope in the boats cockpit you are less likely to have your controls getting caught and tangled in the larger opening of the 57mm block.
Here are the links to the two blocks for you to compare. Which do you use?
Harken 2608 40mm Ratchet Block With Swivel
Really good selection of rope sizes, delivered speedily. Great idea to put the offcuts to good use. Caused a few laughs when people realised what I'd ordered ;-)
The sales team were quick responding to our questions, dispatched to us promptly, and the product is a perfect replacement for our old tiller which ended up at the bottom of a lake!
Love the fact they don’t leak.
You do need to squeeze to get liquid out. Which is so much better. Don’t lose liquid etc.
nice size and robust
Great for when it’s not too cold. But is windy and wet. Needing to stay dry on top.
Very easy to install. May need some additional sealing for complete water-tightness.
It was time for me to upgrade to a newer Ilca and it was recommended that I get a Devoti. The price was competitive and the service from Andrew and his team was fantastic. I received lots of communication and the boat was delivered to me within 2 weeks. It is really great that Sailing Chandlery take the time to set up the rigging so that you can get straight on the water. I am very pleased with my new boat and am loving sailing it. Thank you Sailing Chandlery!
Excellent fit for a topaz. Great service on collection.
Perfect
Love this bag. Great wet area within it as well.
Excellent to use as for a birthday gift to family members keen on sailing
Currently 2 weeks into an Eastern Mediterranean trip with these shoes. Grip is great and they drain really well. Comfort is brilliant… as long as you take the right size. I followed the measurement guidelines and they work well. Highly recommend shoe!
Quick despatch and a good quality product. Moves smoothly along the boom.
Ordered a dyneema RSAero halyard on the Thursday. It arrived by mid day on the Friday and was used on the Saturday. Excellent product and service. Thank you
Reeves really easily, jams well and excellent grip
I bought the burgee and clip for a Hartley 12 and found downwind sailing much easier single handed. The clip came with the screws so it was a 10 minute job including dropping the mast. Website worked well again and the items were delivered quickly so a good job all round.
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