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post #1 of 15 Old 08-21-2007 Thread Starter
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Scott Boom Brake

Does anyone have experience with the Scott boom brake manufactured in the UK? I'm comparing that with the Dutchman system for price, ease of installation and operation as well as reliability. Thanks in advance.
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post #2 of 15 Old 08-21-2007
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Are you talking about the Scott Boomlock?? Given the price difference between the Dutchman and the Scott...$315 for the BB500 and Ł305.00, or $605 at today's exchange rates, for the Boomlock Two, I'd go with the Dutchman. Functionally, they're very similar, although they seem to go about it in slightly different fashions. I have used both, but have the Dutchman mounted on my boat.

The setup on my boat consists of the Dutchman BB500, a Harket Hexamatic Ratchet block, a Spinlock PowerCleat and a Ronstan turning block. Most of the setup can be seen here. The Ronstan block was a recent addition and isn't listed in the article on my blog.

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Sailingdog,
Yes, the Boomlock Two is the one I'm talking about. It does seem pricey, particularly when you add 40 Sterling for shipping. It just looked a little simpler and cleaner for installation and made me curious. The other question I'm not sure of is if all slots on the underside of the boom are the same size. The Scott system seems to be one size fits all which may be correct but I just don't know for sure. I'll have a closer look at the Dutchman system. Thanks.
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Actually, both systems have to have a line run from the chainplates or thereabouts to the boom brake unit and back to the chainplates. On the Dutchman, it is generally run back to the cockpit so that the tension can be controlled from there. The Scott requires a second control line to be run forward along the boom, and then back to the cockpit—so it is basically a wash IMHO. However, I would be worried about the Scott on larger sails, since it isn't scaled up for the different loads generated by larger sails.

BTW, all the components for my installation were less than $450... which would have left me with $150 to do other things with....

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Sailingdog,
I just realized you included an instalation link in your earlier post. That is really helpful, thanks for that. In looking at the Scott unit vs the Dutchman it seems the Dutchman lines run out to the toerail or chainplates and back and then back to the cockpit. 6 lines crossing you cabin top. The Scott has one line through the brake out to each rail and one control line aft. 3 lines crossing the cabin top. Does that sound right to you?
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Ok, this may be a stupid question, but isn't a length of 1/2 inch line tied to the aft end of the boom and run free to mid deck or stern clean, depending on the sail trim, a much simpler and just as effective preventer?

I actually use a 4:1 block and tackle so the rope has some stretch to it, but it is essentially the same rig. What do the retail items give you that this sort of arrangement doesn't?

s/v Jargo
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post #7 of 15 Old 08-21-2007
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LWinters- I'm sure others will pipe in, but from my understanding it's better to run a brake that will allow the boom to move - just slowly - as opposed to completely stopping it. Under high load, you could get pinned down if your boom isn't allowed to center itself or come to the other side eventually. In addition, you could snap your boom fairly easily if you tie it down in the wrong place. The "retail" solutions allow for the introduction of a high amount of friction, slowing the jibe but not completely preventing it. You have more than enough time to correct your course, but in the event of a radical windshift that broaches you - the boom will eventually return to center (or the opposite tack) without you having to do anything. They are also pre-rigged to allow you to jibe the boat from the cockpit without having to disconnect any hardware and moving it to the opposite side.

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LWinters,
Labatt is right on the money. The Scott and Dutchman brakes are much safer and could save you a lot of money in the long run.
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Labatt has nailed the problems with a preventer.

The Dutchman Boom Brake line on my boat starts at the starboard chainplate, runs up to the boom brake and through it, and then down to the port chainplate. At the port chainplate, it runs through a ratchet block and back to a Spinlock Powercleat, by the cockpit. Once through the PowerCleat, it runs through a turning block, attached to the cockpit railing, and that allows it to lead to the port-side genoa winch, in case I need more tension on the line. Generally, I don't use the winch to tension it.

If you looked at the link I posted, the first photo shows the Boom Brake line very clearly... it is the black line going from the chainplates to the brake and back down. You can't see the run back to the PowerCleat because of the curvature of the cabin top and the angle of the camera viewpoint.

I don't know where you are getting the idea that the Dutchman Boom Brake requires six lines crossing the cabin top. It has three, just like the Scott Boom Lock, although the lines are not the same.

The Dutchman Boom Brake has:

Port Chainplate to Boom Brake
Boom Brake to Starboard Chainplate
Starboard Chainplate to cockpit.

However, these are all the same line.

The Scott Boomlock has:

Port Chainplate to Boomlock
Boomlock to Starboard Chainplate
Control line from Boomlock, forward along boom to mast, down mast, and then back to cockpit.

These are two different lines. The Brake line itself, which are the first two listed, and the Control Line, which is the last one listed.

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—Cpt. Mal Reynolds, Serenity (edited)

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post #10 of 15 Old 08-22-2007 Thread Starter
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Sailingdog,
Got it, thanks. I don't know where I got that idea about 6 line runs, must have been one of those senior moments. I think I was looking at some earlier photos Giu had posted and misinterpreting what I saw. At any rate, I'm going with the Dutchman system and I really appreciate your help.
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