9 replies to this topic

[burningbush]

Ive been working on some small shells 2 and 3" and want to make some spooletts to try instead of my improvised visco method I ve been using for timefuse.
I know water glass can be used for fireproofing yet its expensive and I dont have any, so I 'm wondering what I can soak or paste on paper to help it stand up to bp heat on thin spooletts?

Thanks
P.C

[Pretty green flames]

PVA will fireproof your tubes quite nicely, but i see no reason why not use Sodium Silicate, just buy it from skylighter.

[Yugen-biki]

I have used spooletts that I have made myself. And they never burnt through the paper. The paper tubes were about 2mm thick, and I used a silver fountain comp in them.

Make a few solettes and fire them on the ground and see what happens. If it doesn't burn through, try it in a shell.
It is important to make the tube strong with no air boubbles inside the layers of paper.
Do some reserch on how to make paper tubes if you don't get it right.
PVA glue (wood glue) on it's own should be sufficient.

Edited by Yugen-biki, 17 May 2005 - 07:01 PM.

[burningbush]

Yes Ive tried using a layer of high temp metal duct tape for really thin one's and it worked well, I just thought a different method might work?
sodium saylicate might be the way to go.
Thanks for the help
P.C

[seymour]

ofing yet its expensive and I dont have any, so I 'm wondering what I can soak or paste on paper to help it stand up to bp heat on thin spooletts?

Why thin spoilettes?, why not thick walls? Thick walls will also make ramming much easier.

[alany]

Yeah thick walls are definately the way to go.

Roll up the bulk of the thickness with manilla folder cardboard and use kraft to hold the tube together while it is drying and to give it ungrooved inner and outer walls. It also helps offer a rougher surface for the pasting-in to bind to and produce a gas-tight seal, as well as help the meal/fuse composition bite into.surface and prevent blow-through.

You need use nothing more exotic than conventional paste if you make the walls thick enough.

[burningbush]

Yes if I could use a thicker tube it would help not to burn thru , I have to try and use a small tube because the hole for the time fuse is little "2mm plus"
I have used visco rolled in 1 layer foil tape 1 layer high temp electrical tape
and it will just fit thru the time fuse opening.
I could drill away some material to inlarge the hole but fear weaking the shell,
anyways I wanted to make some spouletts to try instead of the visco method
but they would have to be a thin core or thin walls .
I'll try it with differnt thickness and some testing, I'll get it!
I thought some pyro genius here might know a trick for heat protection I hadent heard of yet to try on thin wall spouletts.
Ive got a few differnt Idea's to try,I'll report back my findings

Thanks again
P.C

[BigG]

Bt defualt - spoulettes are THICK. You will not find a thin spoulette.

[alany]

Drill the hole out larger. I did that to attach a whistle spoulette to a 7/8" shell.

[burningbush]

Ok I made some thin "1.1mm thick wall" spoulletes or because their normally thicker walled would they be rammed fuse?
Anyways I tested a few different methods and materials.
My findings are that the foil tape stuck to 35-45 lb craft enough to encircle my forming rod"1.5 mm" twice then around 3-4 more times w/ just craft is what I liked. This worked great for all bp based comps I tested. No burn thru.
I found some hi temp stove & gasket sealer that worked well too.
Its mainly sodium silicate imagine that.
I was told to try wallpaper paste and rockhard waterputty mixed 1 to 1
but didnt try for lack of finding proper brand paste.

I just added 2 more loops of foil tape inside and out side fuse hole in plastic shell
for extra insurance this also holds it in place and adds protection from lift .

I also will drill the hole bigger so I can try whistling one's soon.
Thank
Pc.