259 replies to this topic

[Sambo]

I have been trying all sorts of blue formulae and variations thereof. I have not tried any of the older formula with paris green, nor have I tried any formulae with copper oxychloride as I don't have any (yet). But I have tried a number of AP formula and been underwhelmed with them, the copper benz / AP formula was respectable though.

Most of the perc based blues that I have tried have been very similar in colour saturation, I do have one that is starting to show some promise. The most interesting formula that I have been working on is a chlorate blue with copper benz, copper carbonate a heavy dose of parlon. This seems to work a little differently by producing a hard core that does not disintegrate and allows the escaping gas to burn with a very deep blue, but this formula needs some more work before it is perfected because if the core lights then an orange flame is produced.

Is it possible for this to be pressed into a tube, similar to how a smoke device is produced, leaving a length of tubing empty after the star is pressed.
The gasses are given off the comp and ignite at the open end of the tube, rather than igniting the comp its self? Just a thought, it would probably just blow out in the air though.

Edited by Sambo, 30 August 2008 - 12:55 PM.

[digger]

...

Edited by digger, 20 September 2008 - 10:58 PM.

[Sambo]

Nice shells there! Very intense red, what formula was it? I also like the purple alot, any chance of sharing the formula for that also lol?

Cheers

[digger]

Nice shells there! Very intense red, what formula was it? I also like the purple alot, any chance of sharing the formula for that also lol?

Cheers

Ta, but I cannot take all of the credit. They were simply a test for making paper shells, I have always used plastic up until now and due to a change in firing site I have to now use paper.

The stars were commercial stars so I can't tell you want the formula were. The shells were strawboard hemi's with 10 pasted layers (5 with 3 strip method). The break was 4 grams of flash.

The first 2 shells were good, but in the second two the hemi's look like they burst before the flame front had reached the wall all of the way around so it looks like another couple of layers are needed to ensure a spherical break.

I will try and put the movies in a better format for those who cannot play them when my new video editing software is delivered.

D

[Sambo]

Why dont you use the gummed tape method and slow flash, is is so much quicker than pasting shells. I wasn't convinced at first but now i have the correct amount dialed in they break really well.
You could always try adding an extra gram of flash and keep the pasting the same, to achieve a better break.
Where did you get the stars from btw?

Edited by Sambo, 01 September 2008 - 06:18 PM.

[digger]

Why dont you use the gummed tape method and slow flash, is is so much quicker than pasting shells. I wasn't convinced at first but now i have the correct amount dialed in they break really well.
You could always try adding an extra gram of flash and keep the pasting the same, to achieve a better break.
Where did you get the stars from btw?

I have looked at the gummed tape method, I thought I may give it a go for larger shells. Where do you get your rolls of 3/4" gummed tape and how much do they cost?

It was my first attempt at pasting and it only took 10 minutes (ish) per shell to paste them up which I thought was quick enough. How long does it take you to tape a 3" shell?

I got the stars given to me, it was a one off really and I can't expect to get them on demand.

D

Edited by digger, 01 September 2008 - 10:04 PM.

[Sambo]

It is probably a very similar time, the only difference is i can make and fire within half hour which is quite nice if you just want a quick pyro fix
Here are a few places i found;
http://www.saa.co.uk...ll--977712.html
http://www.lionpic.c...Gummed,365.aspx
Ebay is another option
I originally bought some from inoxia and cut it in half using a hacksaw while turning it on the lathe the tape got a little hot though and has melted some of the adhesive, so its a bit stuck together lol

[portfire]

I have looked at the gummed tape method, I thought I may give it a go for larger shells. Where do you get your rolls of 3/4" gummed tape and how much do they cost?
D

There's a place in Doncaster, (forget the name) it's a 'make your own cards' kinda shop. It cost £1.50 for what looks like 50m. I bought a roll ages ago and still not half way through it. Anyway the last time I was in town I picked up another roll, if you haven't sourced any by the CAT4 course, I'll give you the full roll if you want?

[pihop]

Tried a new pasting method.

[digger]

There's a place in Doncaster, (forget the name) it's a 'make your own cards' kinda shop. It cost £1.50 for what looks like 50m. I bought a roll ages ago and still not half way through it. Anyway the last time I was in town I picked up another roll, if you haven't sourced any by the CAT4 course, I'll give you the full roll if you want?

Thanks Dean

Pihop, what was the method. Very hard breaks there!

[pihop]

Thanks Dean

Pihop, what was the method. Very hard breaks there!

A variation of the gummed tape method. Multiple poles and 2" wide tape instead of just 6 poles and 1" wide tape.

[cplmac]

Time for a bandwidth test.

This is a show my brother and I put on every year for family and friends. It's a large file but worth watching.

RanchBlast 2007

[seymour]

Indeed your fireworks do have a tendency towards being very much worth watching Cplmac.

Unfortunately my computer does not like the format, is there any way you could make it avaliable in a different form?

Thanks

[Creepin_pyro]

Works fine in VLC for me.

Interlacing is a little pronounced but perfectly watchable. The site pushed it just fine, nice and quick.

Gonna watch the whole thing this evening, looks like a nice show - thanks for the upload.

[screwball]

Indeed your fireworks do have a tendency towards being very much worth watching Cplmac.

Unfortunately my computer does not like the format, is there any way you could make it avaliable in a different form?

Thanks

you could try a different video player on your pc such as VLC player its free to use and plays almost every kind of video file and is and is far better than windows media player (imo) just put VLC Player into google.com to get it

the uploaded file is AVI if he changes it to mpg then the file size will increase to possibly double what it is now or the quality will come down in order to keep the file size smaller , im downloading it now but at 550meg its either uncomressed AVI or 1 hell of a long show LOL (decent quality video is normaly 10meg per min of playing time)