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05-07-2017, 13:16
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#16
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Registered User
Join Date: Jun 2012
Location: where pelicans fly
Boat: IP32 ~Whimsy~
Posts: 249
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Re: Magma Flopper Stopper Review
Thanks Ken, I've always been curious about these contraptions. They are definitely worth the price for the extra comfort.
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05-07-2017, 13:35
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#17
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Registered User
Join Date: Apr 2004
Location: Southern Maine
Boat: Prairie 36 Coastal Cruiser
Posts: 3,342
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by jamhass
The farther out you rig them, the more effective they will be. Even a couple of feet can make quite a difference, and is worth the effort.
Watch swap meets. I found a like new one for 50 bucks.
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That's all I'd have, a couple of feet. Also, I only have the one boom, so I'd probably end up with just one flopper stopper. Good idea about looking used, although there are no swap meets around here.
Quote:
Originally Posted by Kenomac
Tom,
We tried hanging one off a bow cleat, and it didn't seem to work very well for preventing the front to back rocking, so we instead went with the spinnaker pole off the side at 90 degrees and the boom situated at 45 degrees more at the stern than directly at 90 degrees of the beam. The stopper hanging off the boom is about six-seven feet away from the boat. The stopper off the spinnaker pole is more like 12-14ft out.
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Again, I'd only have one, and my problem is roll, not pitch, so it would be off the beam, not bow or stern. Any reason why you need that 2nd one?
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05-07-2017, 13:41
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#18
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Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 15,005
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Re: Magma Flopper Stopper Review
I use the plastic cone variation regularly and one thing I did was make a dedicated pole for it because I wasn't comfortable with the halyard being yanked at an angle up top. It is probably fine, but I imagine chafe on edges of the sheaves. It's pretty easy and quick to rig with a bowline around the mast and the halyard only pulling it up to just below the spreaders and the line going out to outboard end of pole. Then I added guys with loops set at the right length to snag cleat fore and aft. I use the plastic cone models (my boat is pretty small) but I like your kind for the way they fold up; much easier to stow. And mine needs a weight to hang from it too; the magma, no.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
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05-07-2017, 14:02
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#19
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cruiser
Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by Don C L
I use the plastic cone variation regularly and one thing I did was make a dedicated pole for it because I wasn't comfortable with the halyard being yanked at an angle up top. It is probably fine, but I imagine chafe on edges of the sheaves. It's pretty easy and quick to rig with a bowline around the mast and the halyard only pulling it up to just below the spreaders and the line going out to outboard end of pole. Then I added guys with loops set at the right length to snag cleat fore and aft. I use the plastic cone models (my boat is pretty small) but I like your kind for the way they fold up; much easier to stow. And mine needs a weight to hang from it too; the magma, no.
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It's actually surprising how little pull there is on the rope leading to the stopper. I'd expected quite the force, but apparently it doesn't require much to stop the roll.
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05-07-2017, 14:06
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#20
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Registered User
Join Date: Dec 2016
Location: Brazil
Boat: Custom Swedish Vindö 50 (35 ft)
Posts: 807
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Re: Magma Flopper Stopper Review
Just a FYI ... In one of the Pardey's books they give instructions to make a flopper stopper using a plastic crate (like the perforated ones they use for milk) and heavy cloth (Sunbrella, for example). I can't remember which book, but it may be The Cost-Conscious Cruiser. It's a pretty simple thing: a one-way valve really.
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05-07-2017, 14:13
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#21
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Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 15,005
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by Copacabana
Just a FYI ... In one of the Pardey's books they give instructions to make a flopper stopper using a plastic crate (like the perforated ones they use for milk) and heavy cloth (Sunbrella, for example). I can't remember which book, but it may be The Cost-Conscious Cruiser. It's a pretty simple thing: a one-way valve really.
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I got one too, they work ok for a small boat, but the square milk crates (strong ones, not craft store kind) are the best and they aren't easy to find. At least you can use the crate for something else too! I think the kind Ken has is probably the best. While the plastic cones work fine, they don't stow well when they are rigged up.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
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05-07-2017, 14:18
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#22
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cruiser
Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
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Re: Magma Flopper Stopper Review
Here's another review on the same Magma Flopper Stopper I made a few days before. On this video, I only had the one off the spinnaker pole deployed. Enjoy the view of Croatia.
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05-07-2017, 14:26
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#23
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cruiser
Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by angelfish2
Thanks Ken, I've always been curious about these contraptions. They are definitely worth the price for the extra comfort.
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I'd buy them again. It turns our boat into a catamaran in anchorages comfort wise. One thing it definitely supresses 100% is the annoying wakes produced by powerboats. I see even the cats bounce side to side when a ferry goes by, but on our boat... absolutely nothing. I can't even tell when another boat passes by, even when they produce a fairly large wake.
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05-07-2017, 14:44
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#24
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cruiser
Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by CaptTom
That's all I'd have, a couple of feet. Also, I only have the one boom, so I'd probably end up with just one flopper stopper. Good idea about looking used, although there are no swap meets around here.
Again, I'd only have one, and my problem is roll, not pitch, so it would be off the beam, not bow or stern. Any reason why you need that 2nd one?
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Yes. One does a very good job, two is better.
With only one stopper deployed, when a swell or wave hits us from the side, the boat will first dip/roll towards the stopper, then the roll is supressed when the boat comes back up. With two stoppers, one on each side, there's no dip to the side when the wave hits, so we can't even tell if a boat has passed by when we're inside the boat.
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05-07-2017, 15:10
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#25
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Registered User
Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 7,264
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by CaptTom
That's all I'd have, a couple of feet. Also, I only have the one boom, so I'd probably end up with just one flopper stopper. Good idea about looking used, although there are no swap meets around here.
Again, I'd only have one, and my problem is roll, not pitch, so it would be off the beam, not bow or stern. Any reason why you need that 2nd one?
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It depends on the hull shape.
We had a full keel, canoe stern with a big bowsprit. (Lord Nelson 35)
One at the tip of the bowsprit and one off a whisker pole to starboard.
It worked well for us.
__________________
'You only live once, but if you do it right, once is enough.
Mae West
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05-07-2017, 15:31
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#26
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Registered User
Join Date: May 2008
Posts: 439
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Re: Magma Flopper Stopper Review
Love this forum! Thanks folks, great stuff!
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06-07-2017, 03:15
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#27
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Registered User
Join Date: Dec 2015
Boat: Amel 54
Posts: 329
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Re: Magma Flopper Stopper Review
I appreciate your review Kenomac and will try this out once refit is done and I’ve gotten her back into the water. It looks promising.
Nice to get all the benefits of a sailboat and also the benefits of a catamarans stability (or even better) at anchorage.
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06-07-2017, 07:07
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#28
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Moderator
Join Date: Mar 2009
Location: Denmark (Winter), Cruising North Sea and Baltic (Summer)
Boat: Cutter-Rigged Moody 54
Posts: 35,008
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by Kenomac
What, nobody interested is preventing rock n roll?
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Thanks for that, Ken.
My boat rolls like a pig in rolly anchorages. It's so bad that I've had people get seasick -- at anchor! .
Rigging up something like this is on my list.
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06-07-2017, 12:39
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#29
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cruiser
Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by Dockhead
Thanks for that, Ken.
My boat rolls like a pig in rolly anchorages. It's so bad that I've had people get seasick -- at anchor! .
Rigging up something like this is on my list.
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Rig two like we did, you'll be pleased with the results. Rolling at the anchorages never bothered me much, but Pam hated it. She's much happier now, but didn't like that I'd spent the money until she saw the results.
Now we're putting off the catamaran, these things saved us a small fortune.
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06-07-2017, 23:55
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#30
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Moderator
Join Date: Mar 2009
Location: Denmark (Winter), Cruising North Sea and Baltic (Summer)
Boat: Cutter-Rigged Moody 54
Posts: 35,008
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Re: Magma Flopper Stopper Review
Quote:
Originally Posted by Kenomac
Rig two like we did, you'll be pleased with the results. Rolling at the anchorages never bothered me much, but Pam hated it. She's much happier now, but didn't like that I'd spent the money until she saw the results.
Now we're putting off the catamaran, these things saved us a small fortune.
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Your boat maybe doesn't roll like mine. It's vastly worse than previous boats. Don't know why - must be the hull shape and bulb keel.
Yes. I'll make up a couple of those. My 8 meter long carbon pole ought to be just the ticket for deploying one of them.
__________________
"You sea! I resign myself to you also . . . . I guess what you mean,
I behold from the beach your crooked inviting fingers,
I believe you refuse to go back without feeling of me;
We must have a turn together . . . . I undress . . . . hurry me out of sight of the land,
Cushion me soft . . . . rock me in billowy drowse,
Dash me with amorous wet . . . . I can repay you."
Walt Whitman
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