I think I came up with a particularly good way to fasten canvas in problem areas.. - SailNet Community

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Old 02-20-2012
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I think I came up with a particularly good way to fasten canvas in problem areas..

...and I wanted to share it here.

Fastening the flap where the slider hatch goes forwars (on boats with no hatch cover cover) is a p.i.t.a, and on many boats it can only just lay there due to tight tolerances between the slider hatch and the cabin top.

I am going to embed high power neodymium magnets into the cabin top and sew them into the dodger flap. For those who aren't familiar with these magnets, they are very powerful - much more so that regular magnets.

I'll also embed them in the hatches so the hatch canvas sticks to the hatch with no visible fasteners..

A more detailed explanation
The Razor Clam Chronicles: How to overcome the issue of fastening the dodger where the slider hatch is

I figured I'd share it here, as this could be an easy DIY that might interest some here (you don't have to embed them, you can just stick them on the cabin roof from inside and sew a velcro patch on the dodger flap to house the magnets)...
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Old 02-20-2012
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Do not rest your ipod, ipad, phone or laptop on the cabin top or hatch once you have the magnets installed, and if you have a bulkhead mount compass, get it reswung. Those mags put out a hell of a field.
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Old 02-20-2012
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If your compass can be adjusted against that strong a field!..Dale
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Old 02-20-2012
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The field wouldn't affect the aft bulkhead three feet away where the compass lives, and you should never place those items (ipod, ipad, phone or laptop) up there to begin with

These magnets are 3/4 of an inch buttons.
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Old 02-20-2012
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Also worth noting that they use these magnets in hard drives and computer components.. so if you're worried about the mag field screwing up your clompass, better keep that ipad and laptop out of the cockpit (and certainly off the cabin top)...
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Old 02-20-2012
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Good point!
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Old 02-20-2012
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If you plan to snap down your dodger flap you are gonna need 3-4. You will also want to use a chafing guard on your dodger flap at the magnet points to prevent the flap from wearing through. BTW you don't need to sew mags into both the flap and install them in the cabin top. Sew them in the flap and screw reciever pads to the cabin top- like these:
Cups, Discs and Washers for Rare-Earth Magnets - Lee Valley Tools

The mags used in drives are smaller and there is only one.
But hey, if you don't think the field will be a problem because they are used in computers, go get a couple, slide them across your computer screen then tuck them in your wallet beside your credit cards.
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Old 02-20-2012
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Quote:
Originally Posted by bljones View Post
If you plan to snap down your dodger flap you are gonna need 3-4. You will also want to use a chafing guard on your dodger flap at the magnet points to prevent the flap from wearing through. BTW you don't need to sew mags into both the flap and install them in the cabin top. Sew them in the flap and screw reciever pads to the cabin top- like these:
Cups, Discs and Washers for Rare-Earth Magnets - Lee Valley Tools

The mags used in drives are smaller and there is only one.
But hey, if you don't think the field will be a problem because they are used in computers, go get a couple, slide them across your computer screen then tuck them in your wallet beside your credit cards.
The whole point is that I don't have the clearance for external fasteners (hence the bedding of the magnets). If I could just screw some fasteners down, I'd not have needed to devise this to begin with..

I have already laid the 5 magnet sets across the area they are to be installed, while placing (holding up) the clompass to the bulkhead.

It's fine, no issues.

Cripes...

Since my word is worthless, I will of course post video here and on my blog proving this - stand by for about a week until the dodger is done
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Old 02-21-2012
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Chris, you don't need to get uptight- we're just trying to help.
Having a dodger and a similar hatch, I didn't understand the clearnace issue, now I do- you want the leading edge of the dodger to be ahead of the slider when it is closed. so the slider would have to slide over any fasteners there. Got it. . I just looked at the pictures of the mock-up on your blog, and I get that you want to get a nice tight seal at the leading edge of the vent flap, where it meets your hatch. Why not just install lead chain or sinkers in the hem of the flap, like is done with mosquito screens, and forgo fasteners entirely. that way you also get a tight seal when the hatch is open, in any position, and no hardware to bed in the deck.

My dodger is a little different than yours- the leading edge of ours is just aft of the leading edge of the hatch, allowing turn buttons to be installed in the hatch itself.
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Last edited by bljones; 02-21-2012 at 12:40 AM. Reason: deleted big picture.
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Old 02-21-2012
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I'm not uptight homie, not at all - I welcome the input (just be willing yourself to hear a counter point).

Regarding the sinker/weight thing, I had that on the last dodger, and on this one I really wanted something better. I wanted something truly fastened and secure. Weights and the like still just "lay" there, the neo mags are small enough not to put out a crazy large field, but powerful enough to really secure down this flap.

Give me the chance to prove it, wait till it's done and reserve the judgement in the negative till then.. I swear it's a great idea and I'll prove it.

(now shrink down your pic so the thread isn't nine miles wide,, and for gods sakes man, back your boat up off the dock a bit! k? )
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