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Techniques / Re: Gerbs (Fountains)
« Last post by stinger on March 09, 2014, 09:50:30 PM »
Nice. What ti you got in there? wouldn't mind writing that one down for later.
General / Re: milling media
« Last post by johno1richard on March 09, 2014, 09:50:01 PM »
pinus radiata is useless for BP, it contains large quantity of voatiles, hence a very slow burn. soft white pine makes reasonable BP. best BP comes from either-
willow, balsa,paulonia or american white ash for your charcoal.I make my BP by placing K S & C straight in mymill  the nitrate is granular the sulphur is fine and the charcoal is lumps75,10,15 and mill for 5 hours htis BP IS AS FAST AS ANYTHING IVE SEEN I USE A MIXTURE OF 50 /50 12MM &20 mm LEAD SINKERS
Techniques / Re: Gerbs (Fountains)
« Last post by Astroboy on March 09, 2014, 08:45:58 PM »
My latest efforts with fountains have been using 1.15"x 4" tubes, the tooling by J1R has an 8mm nozzle that is hollow and allows you to press a fuse in after the nozzle.

Im going to half fill this one with my latest Ti fountain comp, may look to slow it down a little as it burns pretty fast and the nozzle is less than 1/3 of the tube dia.

Im predicting this will run at about 12' to 15' and burn pretty consistent based on earlier tests, Ill light it once it gets dark and post the vid

<a href="" target="_blank" class="aeva_link bbc_link new_win"></a>

As yo can see from the vid it actually cracked about 18' to 20'
Suppliers / Time fuse
« Last post by Lemonjelly on March 07, 2014, 04:23:30 PM »
Would anyone here be interested in time fuse?
I think it's about $10/ mtr plus shipping to you. No border hassles.
If enough are interested Ill get it.
Tooling / Re: Poor Mans Black Match Maker 2.0
« Last post by Mr_W on March 05, 2014, 06:52:48 PM »
Update version of BM maker and will be my last as it works a treat (not all my idea, just adapted to my liking)..... last night I made 80m with less than 100gm, burnt a 0.3m length 12 hrs later at 6.7sec / 300mm
(My std mix is BP 100g, Dex 2g Wallpaper glue 3g, mixed in my dodgy version of a air-shaker, then hot water added)
Techniques / Re: Gerbs (Fountains)
« Last post by Bismuth on March 04, 2014, 09:07:41 PM »
I need to get back on these fountains. Very poor effort. I have made some good fountains, but I'm not after the roaring or tall burning ones. They're easy. I'm trying to re-create a slow burning, majestic iron flame with a parabolic curve that disappears as it touches the ground.

Three lessons learned:

1. Screw Perigrin's forumlas. Not to say that one was particularly bad, but he wasn't very good at all.

2. Need to press it. Body weight has poor results and ramming iron containing powder in my opinion is a bad idea. I need to coat my iron too since I think it was rather oxidised.

3. Much wider nozzle.


I have made floating starmines. I used a 19mm? tube and threw it into the river. Used microstars. It worked VERY well. I will get the video.

Hardt has a great section on aquatic fireworks. I haven't tried a fountain.

Techniques / Re: Gerbs (Fountains)
« Last post by Lemonjelly on March 04, 2014, 03:12:04 PM »
Has anyone tried to make a water gerb?
"A what??"
Forget teacup candles in the spa for that next cozie night together! (or alone :) Try a few of these!!
It's a gerb which has a collar of balsa or cork secured about two thirds from the base so that when you throw it into water the collar acts as a buoyancy device to keep the gerb upright. You seal them with some waterproof capping and use a waterproof fuse.
Haven't made one yet but I imagine several of these on the water would look amazing
Techniques / Re: Gerbs (Fountains)
« Last post by Lemonjelly on March 04, 2014, 02:36:29 PM »
My favourite plain gold gerb has no iron, but using a mix of course charcoal from the BBQ shop maybe 60# with air float. Hard to make a failure!
And of course, always a winner, the Westech Silver recipe.
When incorporating fine metals in gerb mixes, instead of just mixing everything in an ice cream container, wet,granulate and dry the mix. You will get a much more harmonious visual effect with little or no spluttering.
Techniques / Re: Gerbs (Fountains)
« Last post by mango on March 01, 2014, 10:29:16 AM »
hi there pyros,i make fountains that burn real good,i use my normal ratio bp, with pine charcoal, i mix magnesium chips,aluminium powder 200  mesh,some aluminium turnings from engine reconditioners and a sprinkle of cast iron powder or very fine chips also from the engine reconditioners, i put a few teespoons of each with my bp in a chinese food container and mix it well, i put a couple of spoons of bp in my tube and ram it with a wooden dowel and wooden mallet,igive it around 10 even hits,then i put a couple of spoons of mix and ram it again,repeat this until the tube is nearly full then i use bp for the last bit..ignition is with a couple of sparklers and a bit of loose bp....i dont choke mine..  i make these fountains in dried bamboo and they take a half kilo of mix i put a couple of radiator hose clips around the bamboo in case they split and i put the fountain in a can of sand to give it stability... they go real good...bye for now and go out and light something
Tooling / Re: Ball Mills & Gear
« Last post by stinger on March 01, 2014, 08:26:38 AM »
I've been milling bp with alumina media from diverse hobbies for 3-4 years. They aren't sold there anymore and i cant remember exactly what it said but it did mention non-sparking in the description. I've dropped them on top of each other from a meter and reviewed in slow-mo footage and they've never sparked so i consider them pretty safe to use in my 160mm jar
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