Old 08-26-2010, 07:35 PM #1
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Default Can you light a fuse UNDERWATER with a greenie?

Hey all, nice forum you have here.

I'm very curious about lighting fuses under water. First off, is this even possible? I was under the impression they needed to be lit dry, but my good friend insists it can be done underwater. Thanks!

Steve


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Old 08-26-2010, 07:48 PM #2
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Default Re: Can you light a fuse UNDERWATER with a greenie?

bump!
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Old 08-26-2010, 07:59 PM #3
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Default Re: Can you light a fuse UNDERWATER with a greenie?

If you have enough power, id say yes... maybe... I have lit matches under water, but they were covered with a piece of scotch tape.

The black powder used in fuze will stay lit under water, but initiating im not sure..The fact that it gets wet before you add heat may be a problem, but it doesnt hurt to try.
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Old 08-26-2010, 08:01 PM #4
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Default Re: Can you light a fuse UNDERWATER with a greenie?

thanks wannaburn!!
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Old 08-26-2010, 08:05 PM #5
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Default Re: Can you light a fuse UNDERWATER with a greenie?



This is a video I did a while back... Was a 160mW 4x 405nm LD

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Old 08-26-2010, 10:33 PM #6
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Default Re: Can you light a fuse UNDERWATER with a greenie?

nice video iwannaburn
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Old 08-26-2010, 10:49 PM #7
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Default Re: Can you light a fuse UNDERWATER with a greenie?

Quote:
Originally Posted by wannaburn View Post
If you have enough power, id say yes... maybe... I have lit matches under water, but they were covered with a piece of scotch tape.

The black powder used in fuze will stay lit under water, but initiating im not sure..The fact that it gets wet before you add heat may be a problem, but it doesnt hurt to try.
(My bolding)
Yes, it will work fine as long as the fuse is kept dry with something that will let laser light though.
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Old 08-26-2010, 11:55 PM #8
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Default Re: Can you light a fuse UNDERWATER with a greenie?

Waterproof fuse pretty much has to be burning before it goes in the water, otherwise the water will soak in the powder core and trash it. So maybe, but probably hard to do.
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Old 08-27-2010, 12:02 AM #9
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Default Re: Can you light a fuse UNDERWATER with a greenie?

Quote:
Originally Posted by Toke View Post
(My bolding)
Yes, it will work fine as long as the fuse is kept dry with something that will let laser light though.
Thats why I added that video.. My solution then was in of the same idea.
The scotch tape provided the air pocket and allowed the light to pass.

The only problem with the tape I used is that it diffuses the focused light.
I would suggest to the OP that a clear type, not the 'fogged' type be used.

In that case it will work... I was also thinking that a simple thin layer of
clear epoxy may also do the trick and would be more robust. The fuzes
could simply be preped with ease, and not have to worry about the tape
falling off.

The body of 'safety fuze' is coated and waterproof, the only vulnerable area
would be the tip, epoxy may very well be the better choice.
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Old 08-27-2010, 12:07 AM #10
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Default Re: Can you light a fuse UNDERWATER with a greenie?

Quote:
Originally Posted by Toke View Post
(My bolding)
Yes, it will work fine as long as the fuse is kept dry with something that will let laser light though.
Thats why I added that video.. My solution then was in of the same idea.
The scotch tape provided the air pocket and allowed the light to pass.

The only problem with the tape I used is that it diffuses the focused light.
I would suggest to the OP that a clear type, not the 'fogged' type be used.

In that case it will work... I was also thinking that a simple thin layer of
clear epoxy may also do the trick and would be more robust. The fuzes
could simply be preped with ease, and not have to worry about the tape
falling off.

The body of 'safety fuze' is coated and waterproof, the only vulnerable area
would be the tip, epoxy may very well be the better choice.


Quote:
Originally Posted by styropyro View Post
Waterproof fuse pretty much has to be burning before it goes in the water, otherwise the water will soak in the powder core and trash it. So maybe, but probably hard to do.
^ Beat me to it
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Old 08-27-2010, 12:26 AM #11
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Default Re: Can you light a fuse UNDERWATER with a greenie?

I recall something from my youth about fire illegal firecrackers bought in Sweden, we used clear tape around the fuse to make it waterproof, then dropped it into a stream.

I believe we started the wrapping around the fireworks and a small stone to ensure it sank.
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