Azzura Sheet Retrieval

Somebody Else

a person of little consequence
7,725
885
PNW
I haven't seen down belowdecks, but I can think of several ways to do it.

My first choice would be a lever.

A free-wheeling carbon drum winch with a ratchet on the small drum would work well, too, but it's hard to beat the simplicity of a lever.

 

MSA

Anarchist
998
0
Perth
Audi All For One had the same style thing last year. Not sure about the rest. Didn't look closely enough.

A geared drum on the "pull string" with re-tractor and a free spinning reverse gear when you pull the sheet out.

Think crank/pull start lawn mower or outboard.

Cicho looked a bit happy, must have been his idea!

 
Last edited by a moderator:

Presuming Ed

Super Anarchist
11,058
229
London, UK
That's really neat.

My guess: obviously, you're pulling a reverse tackle. But you don't want to just pull the sheet into a reverse tackle because it means you can't pull it out quickly.

Again, I'm guessing here. So, sheet comes down through hole in deck, through block (well call it block A) and is dead ended somewhere. A line comes off the block and goes into a reverse tackle. Shock cord comes off the block the other direction. The shock cord is strong enough to pull out the reverse tackle. The handle is attached to the other end of the reverse tackle.

When you pull the handle, you pull the reverse tackle, which moves block A far enough to get all the sheet through the deck hole. When you release the handle, the shock cord pulls the reverse tackle through and resets the system. Block A could just as well be a fairlead.

I don't have a scanner here, so I will have to see if I can draw what I mean with paint. Ug.

ETA. Doh. Didn't think drums.

 
Last edited by a moderator:

Somebody Else

a person of little consequence
7,725
885
PNW
Here's a schematic for a lever retractor.

azzura_sheet_retractor_lever.png


A drum retractor works exactly the same except you're allowed multiple 360° revolutions -- great for long lines. The drum has a lot more moving parts. MSA's description of an outboard pull-start is dead-on.

 
That's really neat.

My guess: obviously, you're pulling a reverse tackle. But you don't want to just pull the sheet into a reverse tackle because it means you can't pull it out quickly.

Again, I'm guessing here. So, sheet comes down through hole in deck, through block (well call it block A) and is dead ended somewhere. A line comes off the block and goes into a reverse tackle. Shock cord comes off the block the other direction. The shock cord is strong enough to pull out the reverse tackle. The handle is attached to the other end of the reverse tackle.

When you pull the handle, you pull the reverse tackle, which moves block A far enough to get all the sheet through the deck hole. When you release the handle, the shock cord pulls the reverse tackle through and resets the system. Block A could just as well be a fairlead.

I don't have a scanner here, so I will have to see if I can draw what I mean with paint. Ug.

ETA. Doh. Didn't think drums.
1:2 tackle would be the easiest with a shock cord return, a drum would work well too, but be a slightly more complex and heavier install. Very neat and quick...love little ideas like that and Cicho did look pretty pleased with himself.

 

MSA

Anarchist
998
0
Perth
Would a 1:2 tackle with a pull line shock cord retriever not leave 1.5m of dangling rope and also need a long system, say 0.5 to 0.75 boat length, with A-Sail sheets @ 2.5 x LOA? I bet the system is so neat and tidy it fits on the underside of the deck with 2 tabs or on the floor to keep CG lower. Nothing would be dangling around or out of place.

 
Would a 1:2 tackle with a pull line shock cord retriever not leave 1.5m of dangling rope and also need a long system, say 0.5 to 0.75 boat length, with A-Sail sheets @ 2.5 x LOA? I bet the system is so neat and tidy it fits on the underside of the deck with 2 tabs or on the floor to keep CG lower. Nothing would be dangling around or out of place.
Valid point, so drum likely. When the Interlodge did her control line installs it was a mix of some lines run low down in the centre of the boat (vang, outhaul, main cunno) the other control lines for the jib lead in/outs and up/downs were run along under the deck on the outboard sides. I know that Quantum, her sistership managed to get all the control lines down low towards the middle of the boat, nice work by DB. The spinnaker retrieval system was a very light 500mm carbon wheel attached on the Stbd side outboard of the Stbd primary and driven by the pedestal. I could see a similar undriven wheel, mounted as you say low down in the boat at the back end doing the same job. Now how are they driving it?

 

MSA

Anarchist
998
0
Perth
Looks like a Halyard take up system in the pic of Gladiator.

I wonder if you could hook multiple drums to the one pull string. Ie Wing and Jib upwind, Staysail and Spin downwind all run on the same shaft with pressure belt that activates once fully wound up to allow others to keep spinning.

You could line it up perfectly and get rid of the Figure 8 coil, open clutch!!! and hope it doesn't over-spin. anyone got any over-spin stopper ideas?

I might try make one over winter and fit it to the kite halyard on a 42 I sail on.

 
Gearing on the retracting pull cord.
Dammit MSA, stop being so bloody logical, I WANT photos!

edit: Yeah had already thought of gearing.

re Braking of the drum for over spinning, is that a 'finger' rubbing on the drum on the Diverse one offering a slight resistance and therefore braking the drum for the unload of the sheet/halyard? Just to clarify, on the upper left of the drum, coming from the lefthand bracket as you look at it.

 
Last edited by a moderator:

MSA

Anarchist
998
0
Perth
Haha sorry, Im a bit "Its either black or white, there is no grey" Ill as Cicho for a pic.. It might be patent pending though, or their secret weapon!!

 
hi guys. the system on Azzurra is a system developed on Bigamist boat 3 years ago. last year was started to be available on market for everyone. the system is a portuguese concept created by Delmar brothers. the full system for a TP52 weights just 400g per side. if you want any inquiry email: [email protected] watch:



This is a video taked in old Azzura last year!

We install the same in Bribon, Ran 52 72, Synergy Azzura

 


Latest posts





Top