Harken blocks are lightweight, strong and free running. Below are answers to questions we're often asked on how to go about choosing the right hardware for your boat. .
general
When choosing blocks, what should I think about?
What loads will this block handle? Will the loads be static or will the block be frequently tensioned and eased?
Should the block swivel, or locked in a particular axis?
Do I need a single, double, triple, or fiddle block?
Would a ratchet block be helpful? What sort of bearing system is appropriate?
Is a swivel base or stand-up device desirable? What diameter line should I use.
Should it be synthetic, twisted or braided?
What type of mainsheet system will work best?
This depends on the size of your boat, the sail area, and whether you want to race, cruise, or do a little of both.
Other things that will influence your decision are: the size and strength of your crew, the configuration of the boat's deck and cabin house, class rules, and the system you feel comfortable using.
Check out the systems page at http://www.harken.com/rigtips/rigtips.php or give Harken Tech Service a call at 262-691 3320 and they'll be happy to help you.
What is the fastest way to add more power to my mainsheet without losing speed?
A two-speed mainsheet system might be the answer. These double-ended systems give you both fine-tune and gross-trim capabilities.
For fast trimming, pull on both tails of the mainsheet. For more power, pull one tail and you will double your purchase.
Example: you have a 3:1 gross-trim mainsheet system when you pull both ends of the sheet, and a 6:1 fine-tune when you pull one end.
How do I estimate the loads presented to my mainsheet blocks?
Although the following loading formulas are not exact, they will provide you with a good idea of the loads presented to your mainsheet system.
See loading chart : mainsheet system loading.
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