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Author Topic: depth charges  (Read 5481 times)

uboatbuilder

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depth charges
« on: May 24, 2010, 04:37:20 pm »

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DickyD

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Re: depth charges
« Reply #1 on: May 24, 2010, 04:48:25 pm »

I wish. ok2
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gingyer

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Re: depth charges
« Reply #2 on: May 24, 2010, 04:49:35 pm »

have been discussing this recently
you could use Dry ice (youtube search for dry ice bomb :-))  )

it legal and not dangerous if done right but the 2 big problems are
1) storage
2) launching the dry ice from the model

you can get the dry ice any shape and size so you could get it in a rod the diameter and cut to the length of the a depth charge
roll it off the back or throw over the side
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snowwolflair

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Re: depth charges
« Reply #3 on: May 24, 2010, 05:04:03 pm »

We used to buy them from Standard fireworks as "waterproof bangers with electric firing"  there was a member of the Glasgow South club who used to do a bulk purchase for us.
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triumphjon

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Re: depth charges
« Reply #4 on: May 24, 2010, 05:10:41 pm »

the portsmouth model display team use depth charges that are trailled behind models , i know they are deployed via radio control & a battery to the fuse , although i dont know exactly what the procedure is , im sure if you contact the club somebody would be able to advise you of the best way to proceed website is  www.PMBDT.co.uk
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gingyer

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Re: depth charges
« Reply #5 on: May 24, 2010, 05:15:39 pm »

I used to do the fireworks as the last 2 post suggested
but it is and boats have been lost and people injured
it was fun but looking back it was dangerous 
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uboatbuilder

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Re: depth charges
« Reply #6 on: May 24, 2010, 05:51:34 pm »

im a sensible guy i dont want to hurt anyone or be dangerous with it, {-) this could look bad for me im not a hooligan that just likes to blow stuff up {-) i just thought it would look cool if i could get it to work off of my snowberry when i do it
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Mankster

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Re: depth charges
« Reply #7 on: May 24, 2010, 06:01:02 pm »

I wonder if you could do something with an Estes rocket motor. Maybe they sell one with just the parachute deployment charge, without the rocket stage. They are depth charge shaped, go off under water, fired electrically and are sold in hobby shops (so I presume legal).

TugCowboy

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Re: depth charges
« Reply #8 on: May 25, 2010, 01:10:51 pm »

Maybe they sell one with just the parachute deployment charge

Indeed they do! or they did when I last had a go, it was a good 10 years ago and used to buy them from Modelzone. Might be somewhere to start?

Alex
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cbr900

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Re: depth charges
« Reply #9 on: May 25, 2010, 01:31:15 pm »

Hi Guys is this the sort of thing you are looking for,
(http://www.youtube.com/watch?v=VWQQ18fACj0)
Or maybe this one would be better.
(http://www.youtube.com/watch?v=1fuBFAZ90sQ)


Roy
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uboatbuilder

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Re: depth charges
« Reply #10 on: May 25, 2010, 01:47:28 pm »

in the last video the "smoke" that comes out from the water looks like what you get from these dry ice bombs you see on you tube and were mentioned earlier, maybe dry ice is the way to go.

how do i go about getting it, can i get it? if it can do this sort of stuff do you need soome sort of licence for it? :police: :police:
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uboatbuilder

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Re: depth charges
« Reply #11 on: May 25, 2010, 02:13:37 pm »

how would i transport it id need special freezers to keep it at the -70 odd degrees wouldnt I? how long would it last in its frozen state unrefrigerated?

will have to look into estes
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Mankster

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Re: depth charges
« Reply #12 on: May 25, 2010, 03:03:33 pm »

At school it lasted a day in a polystrene box. One of those portable ice boxes should be fine too.

uboatbuilder

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Re: depth charges
« Reply #13 on: May 25, 2010, 04:10:33 pm »

oh ok cool. haha cool 8) {-) {-) {-)
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Big Ada

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Re: depth charges
« Reply #14 on: May 25, 2010, 04:15:12 pm »

I thought I saw someone towing Party Poppers behind their boat and firing them via a cable.

Len.
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snowwolflair

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Re: depth charges
« Reply #15 on: May 25, 2010, 04:17:28 pm »

For the fireworks you would need a Black Powder Licence these days so they dont think you are a terrorist.
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triumphjon

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Re: depth charges
« Reply #16 on: May 25, 2010, 08:35:47 pm »

portsmouth display team , do use the party popper canisters , they are emptied out , filled with a powder ( i dont know what they use ) & sealed in with candle wax , detonation is via the two core cable that also acts as the tow line , its conected internally to a battery  & armed with a switch operated on a spare radio channel , the poppers are available in poundland in bags of about 25 !  hope this may help ? 
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steve pickstock

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Re: depth charges
« Reply #17 on: May 25, 2010, 09:34:19 pm »

The size of the bang is not a function of the amount of powder, but the compression. A party popper charger has got a fair bit of grunt to it. Try one in the dark and see how much flame you get. Properly tamped or wrapped or compressed it would generate a fair explosion.

However and this is the issue. It is illegal to modify fireworks, unless you have a license to do so. So while a party popper is very easily obtained they still class as fireworks. Individuals may store a certain amount of Category 1 and 2 fireworks.





(British law classifies fireworks into four categories, listed in BS 7114: Category 1 ("indoor") fireworks are for use in extremely restricted areas. Category 2 ("garden") fireworks are for use by the public in their gardens. They must be safely viewable from 5 metres away, and must scatter no debris beyond a 3 metre range. Category 3 ("display") fireworks are for use by the public in larger displays. They must be safely viewable from 25 metres away, and must scatter no debris beyond a 20 metre range.
Category 4 ("professional" aka the good stuff) fireworks are for sale only to fireworks professionals. They have no restrictions, and this is the default category for any firework which has not been tested to confirm that it should be in one of the lower categories.\
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cbr900

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Re: depth charges
« Reply #18 on: May 26, 2010, 01:54:19 pm »

I think this guy over here uses black powder, He brings all sorts of bombs and torpedos and mines
ever year, with what he carries in his boot if he ever get hit from behind they will never find any bits of him............. :-))

Roy
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