Re: [pearson ] Digest for pearson-boats@googlegroups.com - 7 updates in 1 topic

[Bob Patton]

I have a slight leak from under the bottom CB pulley on my 36-2, and will be re-bedding it later this week. This discussion on using Dyneema is very timely. Right now raising the CB is a bit of work but I’m assuming all the pulleys are spinning as intended. If one or more of these seize over time, will the dyneema abrade over the seized pulley more quickly than the steel cable?

On Tue, Jun 3, 2025 at 12:14 AM <pearso...@googlegroups.com> wrote:

pearso...@googlegroups.com

Google Groups

Topic digest
View all topics

• What size Dyneema to replace wire centerboard cable on Pearson 36-2? - 7 Updates

What size Dyneema to replace wire centerboard cable on Pearson 36-2?

Helen Tacha <helen...@gmail.com>: Jun 02 01:34PM +0100 Upgrading to Dyneema for your centerboard cable is a great idea, considering its strength, durability, and resistance to wear. When replacing steel wire with Dyneema, you'll want to ensure the new line has sufficient strength and the right diameter for your setup.   Given the 5/32" diameter steel wire has a breaking strength of around 2,400 lbs, you'll want to find a Dyneema line with comparable strength. Dyneema's strength-to-weight ratio is exceptional, so a smaller diameter might suffice.   Some general guidelines for Dyneema diameters and strengths are: - 3/16" (4.8mm) Dyneema: around 4,000-5,000 lbs breaking strength - 1/4" (6.4mm) Dyneema: around 7,000-8,000 lbs breaking strength   Considering your current wire's breaking strength, a 1/4" (6.4mm) Dyneema line might be a good choice, offering a safety margin and sufficient strength for your Pearson 36-2's centerboard.   Before making a final decision, consider factors like: - The specific Dyneema product's strength and durability ratings - The winch's diameter and design - Any potential chafing or abrasion points   It's also a good idea to consult with other Pearson 36-2 owners or a sailing expert familiar with Dyneema upgrades to ensure you're making the best choice for your boat.

Guy Johnson <guy...@hotmail.com>: Jun 02 03:17PM I suggest using Dyneema line of similar size as your original steel cable, it will be stronger and will run over your existing blocks and drums.   Guy Puffin 10M #6 Beverly, MA     Sent from Outlook<http://aka.ms/weboutlook>   ________________________________ From: pearso...@googlegroups.com <pearso...@googlegroups.com> on behalf of Helen Tacha <helen...@gmail.com> Sent: Monday, June 2, 2025 8:34 AM To: pearso...@googlegroups.com <pearso...@googlegroups.com> Subject: Re: [pearson ] What size Dyneema to replace wire centerboard cable on Pearson 36-2?     Upgrading to Dyneema for your centerboard cable is a great idea, considering its strength, durability, and resistance to wear. When replacing steel wire with Dyneema, you'll want to ensure the new line has sufficient strength and the right diameter for your setup.   Given the 5/32" diameter steel wire has a breaking strength of around 2,400 lbs, you'll want to find a Dyneema line with comparable strength. Dyneema's strength-to-weight ratio is exceptional, so a smaller diameter might suffice.   Some general guidelines for Dyneema diameters and strengths are: - 3/16" (4.8mm) Dyneema: around 4,000-5,000 lbs breaking strength - 1/4" (6.4mm) Dyneema: around 7,000-8,000 lbs breaking strength   Considering your current wire's breaking strength, a 1/4" (6.4mm) Dyneema line might be a good choice, offering a safety margin and sufficient strength for your Pearson 36-2's centerboard.   Before making a final decision, consider factors like: - The specific Dyneema product's strength and durability ratings - The winch's diameter and design - Any potential chafing or abrasion points   It's also a good idea to consult with other Pearson 36-2 owners or a sailing expert familiar with Dyneema upgrades to ensure you're making the best choice for your boat.   On Sun, Jun 1, 2025, 14:29 Darren Carlton <darren....@gmail.com<mailto:darren.carlton@gmail.com>> wrote: Have any of you replaced your boat's centerboard cable with Dyneema? Which diameter line did you use?   The wire centerboard cable for my Pearson 36-2 is showing wear where it wraps around the winch, so I need to replace it. I had the wire replaced only 5 years ago, so I'm guessing that steel wire can't handle being wrapped around a small-diameter winch.   I want to use Dyneema since I've heard other boat owners having success with Dyneema centerboard cables. But I'm not sure which diameter of Dyneema to use.   The current steel wire is 5/32" diameter. I assume it's 7x19 flexible wire with a breaking strength of 2,400lbs.   New England Ropes<https://www.neropes.com/product/hts-78/> makes 3/16" Dyneema with 6,050 lbs breaking strength. Or 1/4" with 9,700 lbs breaking strength. The cost difference isn't that much, so I'd go with 1/4" Dyneema but I'm not sure if the sheaves can accommodate such a large diameter.   I appreciate any help you can offer.   Darren Carlton s/v Sand Castle Salem, MA   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com<https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com?utm_medium=email&utm_source=footer>.   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com<https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com?utm_medium=email&utm_source=footer>.

Darren Carlton <darren....@gmail.com>: Jun 02 12:14PM -0400 Thanks, Helena and Guy. I just heard back from a local rigging company. They used 6mm (1/4¨) HTS 78 Dyneema on a Pearson 39 recently.

Peter Nielsen <peteni...@gmail.com>: Jun 03 01:04AM +0700 I'm planning to do this on my 39-2 using 1/4” Dyneema. Will replace the wire reel winch with a ST winch and rope clutch.   On Jun 2, 2025, at 23:15, Darren Carlton <darren....@gmail.com> wrote:      Thanks, Helena and Guy. I just heard back from a local rigging company. They used 6mm (1/4¨) HTS 78 Dyneema on a Pearson 39 recently.   On Mon, Jun 2, 2025 at 11:17 AM Guy Johnson <guy...@hotmail.com> wrote:   I suggest using Dyneema line of similar size as your original steel cable, it will be stronger and will run over your existing blocks and drums.   Guy   Puffin 10M #6   Beverly, MA   Sent from Outlook   From: pearso...@googlegroups.com <pearso...@googlegroups.com> on behalf of Helen Tacha <helen...@gmail.com>   Sent: Monday, June 2, 2025 8:34 AM   To: pearso...@googlegroups.com <pearso...@googlegroups.com>   Subject: Re: [pearson ] What size Dyneema to replace wire centerboard cable on Pearson 36-2?   Upgrading to Dyneema for your centerboard cable is a great idea, considering its strength, durability, and resistance to wear. When replacing steel wire with Dyneema, you'll want to ensure the new line has sufficient strength and the right diameter for your setup.   Given the 5/32" diameter steel wire has a breaking strength of around 2,400 lbs, you'll want to find a Dyneema line with comparable strength. Dyneema's strength-to-weight ratio is exceptional, so a smaller diameter might suffice.   Some general guidelines for Dyneema diameters and strengths are:   - 3/16" (4.8mm) Dyneema: around 4,000-5,000 lbs breaking strength   - 1/4" (6.4mm) Dyneema: around 7,000-8,000 lbs breaking strength   Considering your current wire's breaking strength, a 1/4" (6.4mm) Dyneema line might be a good choice, offering a safety margin and sufficient strength for your Pearson 36-2's centerboard.   Before making a final decision, consider factors like:   - The specific Dyneema product's strength and durability ratings   - The winch's diameter and design   - Any potential chafing or abrasion points   It's also a good idea to consult with other Pearson 36-2 owners or a sailing expert familiar with Dyneema upgrades to ensure you're making the best choice for your boat.   On Sun, Jun 1, 2025, 14:29 Darren Carlton <darren....@gmail.com> wrote:   Have any of you replaced your boat's centerboard cable with Dyneema? Which diameter line did you use?   The wire centerboard cable for my Pearson 36-2 is showing wear where it wraps around the winch, so I need to replace it. I had the wire replaced only 5 years ago, so I'm guessing that steel wire can't handle being wrapped around a small-diameter winch.   I want to use Dyneema since I've heard other boat owners having success with Dyneema centerboard cables. But I'm not sure which diameter of Dyneema to use.   The current steel wire is 5/32" diameter. I assume it's 7x19 flexible wire with a breaking strength of 2,400lbs.   New England Ropes makes 3/16" Dyneema with 6,050 lbs breaking strength. Or 1/4" with 9,700 lbs breaking strength. The cost difference isn't that much, so I'd go with 1/4" Dyneema but I'm not sure if the sheaves can accommodate such a large diameter.   I appreciate any help you can offer.   Darren Carlton   s/v Sand Castle   Salem, MA   --   You received this message because you are subscribed to the Google Groups "pearson-boats" group.   To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com.   --   You received this message because you are subscribed to the Google Groups "pearson-boats" group.   To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com.   --   You received this message because you are subscribed to the Google Groups "pearson-boats" group.   To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/LV3P220MB15402FE3975E0EFC948ED96BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM.   --   You received this message because you are subscribed to the Google Groups "pearson-boats" group.   To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAFUVb8NtrbnCyJFmQYnYCp%3DS6WR83%3DL8VR0oHXwHT%2BB0MchD4Q%40mail.gmail.com.

Darren Carlton <darren....@gmail.com>: Jun 02 03:00PM -0400 Good idea replacing the winch. The winch that Pearson installed seems a little small, given the amount of weight it moves.

Guy Johnson <guy...@hotmail.com>: Jun 02 07:27PM Peter; If you're going to run Dyneema through a clutch and around a winch, you might want to keep a cover on the part of the line running through the clutch and around the winch. Bare Dyneema is pretty slippery, it might not hold all that well in the clutch or on the winch.   Darren; 1/4" could be too large for your blocks and winch. When wrapping Dyneema on a winch ensure the bottom layers are tightly wound to prevent upper layers with greater tension from pulling down into the bottom wraps.   Guy     Sent from Outlook<http://aka.ms/weboutlook>   ________________________________ From: pearso...@googlegroups.com <pearso...@googlegroups.com> on behalf of Peter Nielsen <peteni...@gmail.com> Sent: Monday, June 2, 2025 2:04 PM To: pearso...@googlegroups.com <pearso...@googlegroups.com> Cc: pearso...@googlegroups.com <pearso...@googlegroups.com> Subject: Re: [pearson ] What size Dyneema to replace wire centerboard cable on Pearson 36-2?   I’m planning to do this on my 39-2 using 1/4” Dyneema. Will replace the wire reel winch with a ST winch and rope clutch.   On Jun 2, 2025, at 23:15, Darren Carlton <darren....@gmail.com> wrote:    Thanks, Helena and Guy. I just heard back from a local rigging company. They used 6mm (1/4¨) HTS 78 Dyneema on a Pearson 39 recently.   On Mon, Jun 2, 2025 at 11:17 AM Guy Johnson <guy...@hotmail.com<mailto:guyrj33@hotmail.com>> wrote: I suggest using Dyneema line of similar size as your original steel cable, it will be stronger and will run over your existing blocks and drums.   Guy Puffin 10M #6 Beverly, MA     Sent from Outlook<http://aka.ms/weboutlook>   ________________________________ From: pearso...@googlegroups.com<mailto:pearson-boats@googlegroups.com> <pearso...@googlegroups.com<mailto:pearson-boats@googlegroups.com>> on behalf of Helen Tacha <helen...@gmail.com<mailto:helentacha4@gmail.com>> Sent: Monday, June 2, 2025 8:34 AM To: pearso...@googlegroups.com<mailto:pearson-boats@googlegroups.com> <pearso...@googlegroups.com<mailto:pearson-boats@googlegroups.com>> Subject: Re: [pearson ] What size Dyneema to replace wire centerboard cable on Pearson 36-2?     Upgrading to Dyneema for your centerboard cable is a great idea, considering its strength, durability, and resistance to wear. When replacing steel wire with Dyneema, you'll want to ensure the new line has sufficient strength and the right diameter for your setup.   Given the 5/32" diameter steel wire has a breaking strength of around 2,400 lbs, you'll want to find a Dyneema line with comparable strength. Dyneema's strength-to-weight ratio is exceptional, so a smaller diameter might suffice.   Some general guidelines for Dyneema diameters and strengths are: - 3/16" (4.8mm) Dyneema: around 4,000-5,000 lbs breaking strength - 1/4" (6.4mm) Dyneema: around 7,000-8,000 lbs breaking strength   Considering your current wire's breaking strength, a 1/4" (6.4mm) Dyneema line might be a good choice, offering a safety margin and sufficient strength for your Pearson 36-2's centerboard.   Before making a final decision, consider factors like: - The specific Dyneema product's strength and durability ratings - The winch's diameter and design - Any potential chafing or abrasion points   It's also a good idea to consult with other Pearson 36-2 owners or a sailing expert familiar with Dyneema upgrades to ensure you're making the best choice for your boat.   On Sun, Jun 1, 2025, 14:29 Darren Carlton <darren....@gmail.com<mailto:darren.carlton@gmail.com>> wrote: Have any of you replaced your boat's centerboard cable with Dyneema? Which diameter line did you use?   The wire centerboard cable for my Pearson 36-2 is showing wear where it wraps around the winch, so I need to replace it. I had the wire replaced only 5 years ago, so I'm guessing that steel wire can't handle being wrapped around a small-diameter winch.   I want to use Dyneema since I've heard other boat owners having success with Dyneema centerboard cables. But I'm not sure which diameter of Dyneema to use.   The current steel wire is 5/32" diameter. I assume it's 7x19 flexible wire with a breaking strength of 2,400lbs.   New England Ropes<https://www.neropes.com/product/hts-78/> makes 3/16" Dyneema with 6,050 lbs breaking strength. Or 1/4" with 9,700 lbs breaking strength. The cost difference isn't that much, so I'd go with 1/4" Dyneema but I'm not sure if the sheaves can accommodate such a large diameter.   I appreciate any help you can offer.   Darren Carlton s/v Sand Castle Salem, MA   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com<https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com?utm_medium=email&utm_source=footer>.   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com<https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com?utm_medium=email&utm_source=footer>.   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/LV3P220MB15402FE3975E0EFC948ED96BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM<https://groups.google.com/d/msgid/pearson-boats/LV3P220MB15402FE3975E0EFC948ED96BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM?utm_medium=email&utm_source=footer>.   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAFUVb8NtrbnCyJFmQYnYCp%3DS6WR83%3DL8VR0oHXwHT%2BB0MchD4Q%40mail.gmail.com<https://groups.google.com/d/msgid/pearson-boats/CAFUVb8NtrbnCyJFmQYnYCp%3DS6WR83%3DL8VR0oHXwHT%2BB0MchD4Q%40mail.gmail.com?utm_medium=email&utm_source=footer>.   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com<mailto:pearson-boats+unsubscribe@googlegroups.com>. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/305469B3-1A79-449F-878B-1ADAA5DAA806%40gmail.com<https://groups.google.com/d/msgid/pearson-boats/305469B3-1A79-449F-878B-1ADAA5DAA806%40gmail.com?utm_medium=email&utm_source=footer>.

Dan Pfeiffer <d...@pfeiffer.net>: Jun 02 05:55PM -0500 Couple more things...   You basically can't get a dynema line that is not stronger than the steel wire for the CB. So no issue there.   You should use a spliced eye in the end for attachment (splicing dynema is easy). Any knot might not hold well with the slippery dynema and you will loose 50% of the line strength. But don't forget to account for the increases diameter at the splice. be sure it will fit over or through whatever it needs to.   Running to a stopper and a regular winch (with a cover as Guy suggests) means you can have that winch do other things too (like handling reefing lines?). That's very useful. But if that's not what will happen and the winch is dedicated only to the CB then I would consider sticking with the reel winch. You can use it with the dynema and it's one less line tail to deal with.   Also, be sure a small dynema line can't jump a sheave and jam. Should be fine if it's not less than 1/2 the wire diameter? But be sure.   Dan Pfeiffer   On 2025-06-02 2:27 pm, Guy Johnson wrote:   > To view this discussion visit > https://groups.google.com/d/msgid/pearson-boats/LV3P220MB15402FE3975E0EFC948ED96BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM > [5].   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/CAFUVb8NtrbnCyJFmQYnYCp%3DS6WR83%3DL8VR0oHXwHT%2BB0MchD4Q%40mail.gmail.com [6].   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/305469B3-1A79-449F-878B-1ADAA5DAA806%40gmail.com [7].   -- You received this message because you are subscribed to the Google Groups "pearson-boats" group. To unsubscribe from this group and stop receiving emails from it, send an email to pearson-boat...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/pearson-boats/LV3P220MB1540DFEF529DA3B196DB7E0BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM [8].   Links: ------ [1] http://aka.ms/weboutlook [2] https://www.neropes.com/product/hts-78/ [3] https://groups.google.com/d/msgid/pearson-boats/da79ef56-9d27-43b0-bf0b-d1add6999235n%40googlegroups.com?utm_medium=email&utm_source=footer [4] https://groups.google.com/d/msgid/pearson-boats/CAPaexzXHExLaFX74w4m9nShrOZd_t4%2BpcYPcd4zYbvd2pJ4XMA%40mail.gmail.com?utm_medium=email&utm_source=footer [5] https://groups.google.com/d/msgid/pearson-boats/LV3P220MB15402FE3975E0EFC948ED96BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM?utm_medium=email&utm_source=footer [6] https://groups.google.com/d/msgid/pearson-boats/CAFUVb8NtrbnCyJFmQYnYCp%3DS6WR83%3DL8VR0oHXwHT%2BB0MchD4Q%40mail.gmail.com?utm_medium=email&utm_source=footer [7] https://groups.google.com/d/msgid/pearson-boats/305469B3-1A79-449F-878B-1ADAA5DAA806%40gmail.com?utm_medium=email&utm_source=footer [8] https://groups.google.com/d/msgid/pearson-boats/LV3P220MB1540DFEF529DA3B196DB7E0BBC62A%40LV3P220MB1540.NAMP220.PROD.OUTLOOK.COM?utm_medium=email&utm_source=footer

Back to top

You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to pearson-boat...@googlegroups.com.