Tomahawk
Well-known member
Does anyone have a diagram for how the pulleys in the boom are rigged on a single line system?
Bav 38.
Bav 38.
Single line reefing, diagram wanted
- Thread starter Tomahawk
- Start date
steve1963
Active member
steve1963
Active member
There are dozens of images on the web. Just google single line reefing and go to images.
bobgarrett
Active member
It can depend on the boom. Mine, for example, were like the previous diagram on our first boat but different from our current boat.
Porthandbuoy
Well-known member
davidej
Well-known member
There are quite enough turning block s on a single line system without adding to them by using a balance block. Each extra block is more friction.
duncan99210
Well-known member
The diagram that Steve has posted is the way your Bavaria is rigged. Make sure you use the right sized line: I replaced the fitted 12mm line with 10mm which made things much better.
underdog
Active member
Single line reefing. Picture courtesy Z spars. I specified this system when I had to replace my mast and boom 3 years ago. It works very well
dunedin
Well-known member
Yes our system is closer to underdog's diagram - no pulleys inside the boom, which just seem to be unnecessary complexity. Also we just have eyes at leach and rings at luff. Works perfectly, but use cruising dyneema ropes to be thinner.
TernVI
Well-known member
That's not true.
Or should not be.
In a balance block system, the total distance string moves through blocks is less.
The tesnsion is the same.
Much less string is moving through the awkward blocks potentially rubbing on the sail.
So the work done as friction should be significantly less.
Unfortunately, in my experience, about 3 out of 4 single line systems work really quite badly, however they are intended to be configured.
The 1 out of 4 that works properly is fine, while it's working.
ctva
Well-known member
We ditched the single line reefing on our 34' after a year of ownership as it was easier and more reliable to use a single line from the clew with manual bull horns for the tack.
If it's too risky for the crew to go to the mast, you've left it too late to reef.
The complexity is the same reason I'll never have in-mast reefing .
If it's too risky for the crew to go to the mast, you've left it too late to reef.
The complexity is the same reason I'll never have in-mast reefing .
vyv_cox
Well-known member
That's where we differ then. I have used the system shown in post #2 for 30 years. If it is set up correctly with the smallest section Dyneema it will take (strength, sheave and clutch size) it is superb. I would never have anything else.
Tomahawk
Well-known member
Thanks to all for the help..
mdonnelly
Member
Has anyone fitted the Barton system?
Stemar
Well-known member
No argument with that, but it's an error we all make from time to time. I'm very glad to be able to raise, lower and reef the main without leaving the cockpit, using a home brew version of Underdog's setup. The trick seems to be to use high quality blocks with ball bearings. Sleeve bearings work for a while, but soon get stiff.
