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Search: Posts Made By: Brion Toss
Forum: SparTalk 05-17-2017, 08:10 PM
Replies: 4
Views: 924
Posted By Brion Toss
Options

Hi,
I've been asking around, and an excellent source gave me some recommendations in the Seattle area. Be in touch with PM if you are interested.
Fair leads,
Brion
Forum: SparTalk 05-06-2017, 09:21 AM
Replies: 4
Views: 924
Posted By Brion Toss
Site, and boats

Hi,
First, spam has obviously entrenched itself here. We are waiting for a tech to come and install a better version, but it might be a while. So apologies for this mess, which has caused a...
Forum: SparTalk 04-28-2017, 10:52 AM
Replies: 4
Views: 820
Posted By Brion Toss
Options

Hi again,
As an engineer, you might enjoy/comprehend Larsson & Eliasson's Principles of Yacht Design. A much-simplified version can be found in the Rigger's Apprentice. There is really a rather slim...
Forum: SparTalk 04-27-2017, 12:09 PM
Replies: 4
Views: 820
Posted By Brion Toss
Vectors

Hello,
Yes, a definite problem. Spreader thrust from the weather upper will be working on a rather long lever arm. On the other hand, if the mast section is right for a lower spreader location --...
Forum: SparTalk 04-11-2017, 09:28 PM
Replies: 4
Views: 1,693
Posted By Brion Toss
Data

Hi,
At that level, the difference in strength is not significant, especially as, until further improvements are made, the breaks we are getting are in the eye, not adjacent to the button (see...
Forum: SparTalk 03-24-2017, 01:40 PM
Replies: 4
Views: 986
Posted By Brion Toss
Variables

Hello,
The good news is that you are in a position to set an optimal position for your mast. The bad news is that determining that position, in terms of both rake and bend, can be tricky.
Let's start...
Forum: SparTalk 03-19-2017, 06:36 PM
Replies: 5
Views: 957
Posted By Brion Toss
Maybe...

Hi again,
From what I can see, this is not Blizzard; that has two tracer colors in every color, and is much more smoothly made than what you show. Where did you buy it?
Fair leads,
Brion Toss
Forum: SparTalk 03-18-2017, 11:31 AM
Replies: 5
Views: 957
Posted By Brion Toss
Hm

Hi,
That appears to be an HM-core rope; if it is, it takes a different splice. What brand and model is it?
Fair leads,
Brion Toss
Forum: SparTalk 03-13-2017, 10:17 PM
Replies: 3
Views: 993
Posted By Brion Toss
Variables

Hi,
Dyneema eyes can get down to a 1:1 ratio of rope to pin before break strength drops -- in the lab. But a loose cover, a tight fit in the sheave, and what is likely some component of strong...
Forum: SparTalk 03-12-2017, 09:14 AM
Replies: 5
Views: 1,254
Posted By Brion Toss
Ick

Hi,
If this is new rope, Samson deems it unspliceable (http://www.samsonrope.com/Pages/ProductList.aspx?CategoryType=1&Category=Double%20Braid%20/%20Parallel%20Fiber%20core). If it is antique, they...
Forum: SparTalk 03-04-2017, 08:05 PM
Replies: 7
Views: 1,970
Posted By Brion Toss
Complications

Hello,
As I understand it, braided cabling covers are how braided rope got its start. And you can get a variety of cover-only ropes suitable for covering HM cores. The trouble is that you have to get...
Forum: SparTalk 03-04-2017, 08:03 PM
Replies: 4
Views: 1,693
Posted By Brion Toss
Variations

Hi,
Looks like a good one, though the claimed break percentage seems high; does anyone know what the number is based on? Samson, and others, list minimum, average, and maximum break strengths in...
Forum: SparTalk 03-03-2017, 06:08 AM
Replies: 1
Views: 1,136
Posted By Brion Toss
Details

Hello,
And first, sorry for being so slow in replying. Anything that has less elasticity, but not more weight, would make for an improvement, and your boat would notice the difference. Whether it...
Forum: SparTalk 03-03-2017, 06:00 AM
Replies: 7
Views: 1,970
Posted By Brion Toss
Options

Hello,
We have rigged numerous boats with Spectra/Dyneema, both traditional and modern. It can be readily served; we parcel with friction tape, both to provide a slightly adhesive bedding for the...
Forum: SparTalk 02-05-2017, 05:49 PM
Replies: 3
Views: 890
Posted By Brion Toss
ratios

Hello,
If you run the numbers on classical lanyard proportions (half the shroud diameter for rope, same diameter for wire), you will see that the lanyard is always significantly stronger than the...
Forum: SparTalk 01-25-2017, 08:03 PM
Replies: 3
Views: 1,239
Posted By Brion Toss
Vectors

Hi,
A loose fit isn't necessarily a deal-breaker, assuming that you have lots of compression surface to bear on, and that the loads on the iron run straight down the bowsprit. Unfortunately, few...
Forum: SparTalk 01-14-2017, 05:48 PM
Replies: 4
Views: 1,418
Posted By Brion Toss
Details

Hi again,
A small portion of the stay load is expressed laterally when the loads are highest (on the wind in a breeze), and the mast itself provides the needed lateral resistance. Your current...
Forum: SparTalk 01-13-2017, 12:42 PM
Replies: 4
Views: 1,418
Posted By Brion Toss
Throw them away

Hi,
I think it is safe to say that those intermediates are doing little or nothing to stabilize the mast or make use of loads. Try sailing with them tuned, then slack, and see if you can notice any...
Forum: SparTalk 01-13-2017, 12:39 PM
Replies: 3
Views: 1,105
Posted By Brion Toss
Options

There is a strength reduction in any hitch, probably about 20% in this case. Not a significant loss. Ring-hitching to the clew does make for a bump, that can hang up in some cases, and can damage...
Forum: SparTalk 12-28-2016, 06:06 PM
Replies: 9
Views: 1,672
Posted By Brion Toss
Still yes

Hi again,
Now those rigs are an interesting historical sidenote, in that they skipped the lower spreaders with the uppers, not the intermediates. As with the BCC's this worked... sort of. The masts...
Forum: SparTalk 12-22-2016, 07:18 PM
Replies: 1
Views: 1,294
Posted By Brion Toss
Catching up

Hello all,
For the past 6 weeks, I have been utterly immersed in rerigging the replica of the "Columbia Rediviva." In Disneyland. Yes, it is Disneyland, but it is a real rig, and the people who run...
Forum: SparTalk 12-18-2016, 06:34 AM
Replies: 9
Views: 1,672
Posted By Brion Toss
Yes

Hi,
This is a relatively rare configuration, though standard, unfortunately, on Bristol Channel Cutters. The original rig there was single-spreader, with aft-led intermediates. The builder then went...
Forum: SparTalk 11-16-2016, 08:25 PM
Replies: 2
Views: 1,121
Posted By Brion Toss
Variables

Hi,
First, the weight of the furler is of no significance, unless perhaps it is made out of very thick lead. There is also no reliable correlation between displacement and rig loads. The jibstay --...
Forum: SparTalk 11-01-2016, 01:23 PM
Replies: 1
Views: 1,242
Posted By Brion Toss
Options

Hello,
A good scissor sharpening service will be able to do it for you, though they might find that they have to work hard to get any effect on that very tough steel. Here in the shop we use a belt...
Forum: SparTalk 10-19-2016, 02:30 PM
Replies: 5
Views: 1,507
Posted By Brion Toss
Bolts

Hi again,
The primary load on those bolts will be in shear. Even if the deck plate doubles to support halyard turning blocks, it is most unlikely that any halyard would provide even a 1,500lb...
Showing results 1 to 25 of 500

 

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