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Search: Posts Made By: JohnV
Forum: SparTalk 07-04-2016, 07:16 AM
Replies: 5
Views: 2,400
Posted By JohnV
Thanks for the reply, Ian. I have hardwood wedges...

Thanks for the reply, Ian. I have hardwood wedges that came with the boat. I had thought that rubber ones might put less stress on the mast at the partners. But I guess I don't have anything...
Forum: SparTalk 07-03-2016, 07:14 PM
Replies: 5
Views: 2,400
Posted By JohnV
Rubber wedges--old tire?

There's a big old tractor tire washed up on the shore near me, with fat, thick bar treads. I keep thinking I should saw off some of the bar treads and shape them into mast wedges. I researched a...
Forum: SparTalk 03-03-2016, 06:17 PM
Replies: 8
Views: 2,814
Posted By JohnV
Thanks. I'm going to go up and measure to the...

Thanks. I'm going to go up and measure to the chainplates in the next day or so and re-calculate. Occurs to me, though, that I'll still have to go with TBs that have 1/2" pins, since I replaced the...
Forum: SparTalk 03-02-2016, 09:42 PM
Replies: 8
Views: 2,814
Posted By JohnV
Brion, Thanks for weighing in, and addressing the...

Brion,
Thanks for weighing in, and addressing the original question. You're right about the numbers.
The DWL is 27.5' and 1/2 beam is 5.335.
I interpolated a RM of 25000, probably high but it's a...
Forum: SparTalk 03-01-2016, 09:57 AM
Replies: 8
Views: 2,814
Posted By JohnV
Thanks for the replies. I'd much rather have gone...

Thanks for the replies. I'd much rather have gone with synthetics, but for the cost. Per Colligo's online catalog, the 11mm uncovered dynex dux, stretch equivalent to 5/16" wire, is $9.35, almost 2x...
Forum: SparTalk 02-29-2016, 01:47 PM
Replies: 8
Views: 2,814
Posted By JohnV
Reality Check

In the midst of planning replacement standing rigging, I’ve learned why it’s important to size turnbuckles at about 4/3 the breaking strength of the wire.
My heavy 33’ cruiser’s original cutter rig...
Forum: SparTalk 02-27-2016, 07:43 PM
Replies: 5
Views: 2,674
Posted By JohnV
Ian, thanks for the response. I like the idea of...

Ian, thanks for the response. I like the idea of using the jib stay to tweak it down.
John
Forum: SparTalk 02-27-2016, 12:32 PM
Replies: 5
Views: 2,674
Posted By JohnV
Brion, Re: flexing the bowsprit down--for that...

Brion, Re: flexing the bowsprit down--for that kind of savings, I'll find a way. Probably set 50-100 lbs on it just to bottom out any flex, then be real careful of the measurements when I assemble...
Forum: SparTalk 02-26-2016, 08:51 AM
Replies: 5
Views: 2,674
Posted By JohnV
Do bobstays need turnbuckles?

I'm planning a standing rigging replacement. The boat is a 33' Alajuela, a heavy cruiser. The bow platform is on a tubular aluminum frame and extends 29".
The bobstay is 3/8" 1x19 with the original...
Forum: SparTalk 02-25-2016, 05:00 PM
Replies: 10
Views: 4,276
Posted By JohnV
Thanks to you all for your thoughts. Re: the...

Thanks to you all for your thoughts.
Re: the stretch that allene mentioned, I'm using sta-set x in order to reduce stretch, and the portion of the line from the boom to the foredeck is Amsteel...
Forum: SparTalk 02-24-2016, 05:26 PM
Replies: 10
Views: 4,276
Posted By JohnV
Thanks for the replies-- Ben, those gizmos are...

Thanks for the replies--
Ben, those gizmos are such a break with tradition that I think most of us--at least true of myself--are hard-wired to overlook them.
Ian, that question was one of the reasons...
Forum: SparTalk 02-23-2016, 05:30 PM
Replies: 10
Views: 4,276
Posted By JohnV
Boom preventer: Antal low-friction ring vs turning block opinions?

I'm considering using an Antal low-friction ring in place of turning blocks on my boom preventer. The current design is, the (Sta-set X) preventer line runs from boom-end through a large snatchblock...
Forum: SparTalk 06-12-2015, 09:04 PM
Replies: 2
Views: 2,111
Posted By JohnV
That's a hairy-looking splice but it looks like...

That's a hairy-looking splice but it looks like the answer. Thank you, Brion.
John
Forum: SparTalk 06-09-2015, 09:13 PM
Replies: 2
Views: 2,111
Posted By JohnV
End-to-end splice

I want to lengthen my main sheet. When I replaced the old, I measured the original sheet, assuming it was the right length. Dumb move.
It's 1/2" Sta-set, over-sized for a good grip. I figure to add a...
Forum: SparTalk 02-23-2013, 06:30 PM
Replies: 10
Views: 6,335
Posted By JohnV
Brion, your point addresses my original question...

Brion, your point addresses my original question of one long line vs 2 short ones: which is more likely to fail when a weak point is stressed beyond its limit?

Here’s been my thinking—if you can...
Forum: SparTalk 02-22-2013, 06:37 PM
Replies: 10
Views: 6,335
Posted By JohnV
I think experimenting with simulated overboard...

I think experimenting with simulated overboard falls is a great idea and I'll make it a point to do it sometime. I do worry about the issue, as I usually sail alone. My main focus is on fetching up...
Forum: SparTalk 02-21-2013, 07:49 PM
Replies: 10
Views: 6,335
Posted By JohnV
Ian, thanks for your thoughts. I take your point...

Ian, thanks for your thoughts. I take your point about keeping some slack in the line. It occurs to me that I could run a few feet of shock cord inside the jackline to keep it taught and out of the...
Forum: SparTalk 02-21-2013, 01:04 PM
Replies: 10
Views: 6,335
Posted By JohnV
Jacklines (vs jack's line)

I'm making my jackline (or possibly lines) of Amsteel Blue. They'll run along either side deck of my 33' cruiser, from the sbd c'pit coaming, around the (round) anchor bit, back to the ps...
Forum: SparTalk 07-25-2012, 09:16 PM
Replies: 10
Views: 9,388
Posted By JohnV
Try it before you talk, danno.

Cut any one of the three, and the knot will hold.
Since I'm talking about historical and not modern usage, and we know that modern HM ropes don't hold most knots well, obviously they're the...
Forum: SparTalk 07-25-2012, 09:05 PM
Replies: 3
Views: 3,360
Posted By JohnV
Your response is unorthodox, benz, but makes...

Your response is unorthodox, benz, but makes sense. You should see the comments in the Sailnet list on the same topic. As Stumble observed on another post, people--myself included, I guess--read in a...
Forum: SparTalk 07-24-2012, 12:23 PM
Replies: 3
Views: 3,360
Posted By JohnV
U-bolts vs pad-eyes for cockpit tether points?

I need some tether clip-on points in my cockpit. But Wichard forged padeyes cost a lot, and cheap Chinese copies aren't reliable. So, I wonder about using u-bolts that have the same or higher load...
Forum: SparTalk 05-31-2012, 07:04 AM
Replies: 10
Views: 9,388
Posted By JohnV
You're right, Ian, but I was describing an...

You're right, Ian, but I was describing an archaic use of the knot that fell out of favor before synthetics were invented. Pardon the pun.
And before anybody with a Visa card could buy twice as much...
Forum: SparTalk 05-30-2012, 08:07 PM
Replies: 10
Views: 9,388
Posted By JohnV
The Oxford English Dictionary has the first...

The Oxford English Dictionary has the first reference to a sheepshank knot in 1627, used to shorten the fall of a tackle. It was also called a dogshank. An animal's shank has two bones plus a long...
Forum: SparTalk 05-26-2012, 09:22 PM
Replies: 3
Views: 3,361
Posted By JohnV
I agree about the dogmatic quality that a lot of...

I agree about the dogmatic quality that a lot of our common wisdom acquires. It's good to question it sometimes.
And you're right--there's all kinds of line to step on--you'd think it would be...
Forum: SparTalk 05-26-2012, 07:17 PM
Replies: 3
Views: 3,361
Posted By JohnV
Amsteel Blue for jacklines?

Polyester webbing is hard to find, and nylon stretches a lot, so lately I've wondered about the advisablity of using Amsteel Blue for jacklines. I used it for lifelines and I like it. I've read...
Showing results 1 to 25 of 59

 

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