Express 37 in-boom block & tackle

Pazzo

New member
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Hi. I just bought an Express 37 and I’m trying to figure it out what the block and tackle inside the boom is for and how it should be rigged. You can see one end of with three blocks from underneath the boom right behind the line jams. The end of the line exits the boom about 3/4 of the way to stern and passes through another block and cam cleat. I think it is meant to attach to the backhaul, but mine runs from the back straight to the front of the boom. Anyone familiar with this setup?

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chewey

New member
34
8
That set up should be the Fine Tune for the Main Sheet. Dead end of Main Sheet should enter the boom and get small (but powerful) adjustments from this.
 

yoyo

Anarchist
760
316
If the cleat is towards the aft end of the boom not far from the primary mainsheet purchase its could be a mainsheet fine tune as chewey suggested. If the cleat was further forward towards gooseneck I would guess outhaul. Should be fairly easy to figure out by pulling on it.
Congrats on the boat...
 

longy

Overlord of Anarchy
6,802
1,145
San Diego
I would be almost certain that is a fine tune for the mainsheet, but as said above, just pull on the green line & see what happens! Outhaul is also almost always led to a tackle (about 3:1) inside the boom, exiting & cleated aT FRONT (MAST) end of boom.
Mainsheet fine tune - use it for small adjustments going upwind, trimmer can be out on rail as don't need a winch. Just as the boat turns to go downwind, pop the line out of the cleat completely & leave it out until going upwind again. That will allow the tackle to extend so you have full adjustment to go upwind
 
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Looper

Anarchist
I'm going to say outhaul based on the boom shots in the retro-boat video here:

Line fleck pattern matches what's connected to the car the mainsail clew connects to.
 
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Pazzo

New member
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0
It is Pazzo. Anyone know the history of the boat?

Currently nothing happens when you pull the line. The outhaul passes it and goes directly to the front of the boom. That can’t be right as there is no winch on the mast or any other way to get adequate purchase on the outhaul. I think I have to fish out the block and reattach the outhaul to it.
 

longy

Overlord of Anarchy
6,802
1,145
San Diego
You can clearly see in Scot's vid that the tail end of the mainsheet goes into the boom just behind the swiveling cleat. It's a sheet fine tune
 

Alex W

Super Anarchist
3,326
316
Seattle, WA
On my Express 37 the outhaul is in the boom on a cascade that ends up at 16:1. The main sheet fine tune is attached to the traveler main sheet block (main sheet is 6:1 with a cascaded 4:1 fine tune for 24:1 total). I can dig up pictures showing how the boom is routes internally if that is helpful.
 

Alex W

Super Anarchist
3,326
316
Seattle, WA
Our boat also had a block in the boom for the leech reef (which is on a hook so it can move to any position). That went to one of the cleats at the front of the boom, our outhaul exits mid-aft boom as shown in your photos.
 

Pazzo

New member
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0
The ability to tighten it loosen the foot of the sail with one hand from the cockpit while sailing up wind sounds like a pretty helpful feature to me.
 

Alex W

Super Anarchist
3,326
316
Seattle, WA
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I took this photo when I re-did our outhaul and had to setup the lengths on everything. It all goes inside the boom, so I took this to remind me of how it works. The orange dyneema on the far end (right) is what goes to the clew car. The blue and orange dyneema on the left go to fixed anchors in the boom. The purple is the adjustment line. The mainsheet attaches to the thick white dyneema near the back of the boom.

It was really worth the time to take it all apart and put it back together. The old system was similar but everything was crusty and not moving smoothly. Now we can very nicely tension and ease the outhaul.
 




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