I think I'm going to replace the tired jib blocks on my Prindle - what would an appropriate sheave size be in the replacement?
thanks
jib block sheave size
-
- Rank: Lubber
- Registered: Sep 23, 2022
- Last visit: Sep 06, 2024
- Posts: 97
Posted: Jul 16, 2024 - 11:53 AM
-
- Rank: Administrator
- Registered: Jul 19, 2001
- Last visit: Aug 11, 2024
- Posts: 3442
Posted: Jul 16, 2024 - 07:53 PM
For main blocks? What are you going for 6,7,8:1 ? They don't come in a lot of sizes so mainly it's matching the proper pulley size to the sheet you want to use. Smaller sheets and blocks are lighter and have less friction but harder on the hands.
The hot setup changed from traditional "Yale Light" thick sheets to something like Salsa Braid which doesn't absorb water, is very light, runs well, but can eat your wet hands.
Also smaller generally more expensive per foot.
--
Damon Linkous
1992 Hobie 18
Memphis, TN
How To Create Your Signature
How To Create Your Own Cool Avatar
How To Display Pictures In The Forums.
-- -
- Rank: Lubber
- Registered: Sep 23, 2022
- Last visit: Sep 06, 2024
- Posts: 97
Posted: Jul 16, 2024 - 07:57 PM
It's the stock 2:1 - one block on the tramp (the one in question), and one at the jib clew. The block(s) at the jib clew are 29mm. Sheet is 8 mm.
-Matt -
- Rank: Administrator
- Registered: Jul 19, 2001
- Last visit: Aug 11, 2024
- Posts: 3442
Posted: Jul 16, 2024 - 08:14 PM
OK Jib block. If you aren't changing sheet size, probably just go with the same size you've got. What is the main problem you want to solve? The deck block just needs to run freely and stand up without fouling. For the clew block, the lighter the better especially in very light air days.
--
Damon Linkous
1992 Hobie 18
Memphis, TN
How To Create Your Signature
How To Create Your Own Cool Avatar
How To Display Pictures In The Forums.
-- -
- Rank: Lubber
- Registered: Sep 23, 2022
- Last visit: Sep 06, 2024
- Posts: 97
Posted: Jul 16, 2024 - 08:17 PM
Thanks. I just wanted to make sure what I buy is gonna do the job. This makes sense.
-Matt -
- Rank: Mate
- Registered: Nov 22, 2012
- Last visit: Sep 03, 2024
- Posts: 408
Posted: Jul 18, 2024 - 07:01 PM
Go with the Harken 2139.
--
Scott
Prindle Fleet 2
TCDYC
Prindle 18-2 Mod "FrankenKitty"
Tornado Classic "Fast Furniture"
Prindle 19 "Mr. Wiggly"
Nacra 5.8 "De ja vu"
Nacra 5.0
Nacra 5.8
Tornadoes (Reg White)
-- -
- Rank: Lubber
- Registered: Sep 23, 2022
- Last visit: Sep 06, 2024
- Posts: 97
Posted: Jul 19, 2024 - 11:10 AM
That would be nice, but just a tad outside of my budget.
-Matt -
- Rank: Chief
- Registered: Nov 26, 2009
- Last visit: Aug 10, 2024
- Posts: 2531
Posted: Jul 20, 2024 - 11:01 PM
I wasn’t sure if you needed the clew block, or the main blocks.
I have a set of harken ratchet blocks…they look just like the 2139s mentioned above.
You can have them for cheap, they’ve been sitting in my parts box for a few years. I think they came off a Mystere 20 footer I had.
I’m doing a 5000km road trip on Adventure motorcycles, in western Canada Rockies right now. I will be dropping down into the USA in Montana, & shipping from the US is cheaper than Canada.
PM me an email address, I’ll send you some photos of them.
If you decide you don’t like them, send them back & I’ll refund any purchase price.
To be clear, they are NoT the modern 2139s mentioned, they do the same thing but are older style. Ratchet function is guaranteed.
I think they are equivalent to the 75mm blocks mentioned.
You can have them both $75
Edited by Edchris177 on Jul 20, 2024 - 11:10 PM.
--
Hobie 18 Magnum
Dart 15
Mystere 6.0XL Sold Was a handful solo
Nacra 5.7
Nacra 5.0
Bombardier Invitation (Now officially DEAD)
Various other Dock cluttering WaterCrap
-- -
- Rank: Lubber
- Registered: Sep 23, 2022
- Last visit: Sep 06, 2024
- Posts: 97
Posted: Jul 22, 2024 - 08:56 PM
PM sent - thanks!
Users on-line
This list is based on users active over the last 60 minutes.