13 replies to this topic

[pyrosailor99]

Hi all!

See the this video at 7:30.

how i can build that whistling devices??

those seems not to be simple whitles as some roket before whas launched real simple whistle and the effect was different...



see also the rocket ad 9:02. what stars are these? flying stars?

Edited by pyrosailor99, 02 June 2011 - 11:30 AM.

[dan999ification]

Hi all!

See the this video at 7:30.

how i can build that whistling devices??

those seems not to be simple whitles as some roket before whas launched real simple whistle and the effect was different...

http://youtu.be/intmdbzkE_s

see also the rocket ad 9:02. what stars are these? flying stars?

the first you mention are called hummers plenty of info out there im not making a tut there was recent discussions here on them just a tube plugged at both ends with a bp and metal comp in the middle and a hole made in the wall of the tube at an angle creating an axis for it to spin on and a vortex for the exhaust gasses to escape giving you a whistle these ones are very well made.
the second are go getters or fireflys a star in a tube that is basically a rocket engine any star comp should work small id tubes need no nozzle.
hope this helps.
dan

[pyrosailor99]

thank you very much. the english name made me able to search about!
i've just found another kind of device i love... 'farfalla'!

i've just discovered fireflys works as i was expecting... good news my brain is not burned!

[dan999ification]

thank you very much. the english name made me able to search about!
i've just found another kind of device i love... 'farfalla'!

i've just discovered fireflys works as i was expecting... good news my brain is not burned!

farafelle stars? butterfly's. you may also like tourbillion stars[you could plug one end with a pumped star] all tube based effects great for canister shells. i would love to see a shell with some of each in it.
dan

[pyrosailor99]

farafelle stars? butterfly's. you may also like tourbillion stars[you could plug one end with a pumped star] all tube based effects great for canister shells. i would love to see a shell with some of each in it.
dan

yeah, farfallas (or butterflies), i read those mantained their original italian name on pyroguide...

wow. i love also tourbillions




damn loving it!!

[Mumbles]

Farfalle, as you mentioned, does literally mean butterfly. The name doesn't seem as obvious when you see them flying through the air. Farfalle are made just like the above tourbillions, except there are two holes instead of 1 toward the end of the tube, opposite one another. When burned on the ground, it sends out two large sprays of metal sparks that resemble a butterfly's wings. You can also put the hole in the center of the tube instead of an end. It probably gives them a straighter trajectory and a more dense spray, but you can't fit as many in a shell. With the holes toward the end of the tube, they can spin and spiral, possibly due to off center holes.

[pyrosailor99]

Farfalle, as you mentioned, does literally mean butterfly. The name doesn't seem as obvious when you see them flying through the air. Farfalle are made just like the above tourbillions, except there are two holes instead of 1 toward the end of the tube, opposite one another. When burned on the ground, it sends out two large sprays of metal sparks that resemble a butterfly's wings. You can also put the hole in the center of the tube instead of an end. It probably gives them a straighter trajectory and a more dense spray, but you can't fit as many in a shell. With the holes toward the end of the tube, they can spin and spiral, possibly due to off center holes.

yeah, i know farfalle is the italian name for butterflies... just reading info on pyroguide i was thinking you also know it as 'farfalle' more than 'butterflies'... just like 'spaghetti' or 'pizza'.

anyway farfalle are different from turbillion. maybe you never seen a well-done farfalla device but i can assure to you that 2 holes are needed to obtain that effect.
With the pass-trough hole in the middle of the tube , the flying device oscillate of some degrèè clockwise and counterwise sprying sparks... this is the movement that draw the butterfly wings in the sky. Butterflies should never make a complete turn by it-self... (anyway this can be caused by the launch)

on the countrary i think that tourbillions have a single hole because thay *have to* turn on itself during the flight...

thank you for the reply!

[madmandotcom]

while we are on the subject of unidentified devices, my mum found some fireworks the other day so we let them of and they made about 40 really bright flashes, when i dismantled one of them, it appeared to be a large lump of plaster of paris and was about the size of the on button for a desktop computer, any ideas what they are?

[pyrosailor99]

while we are on the subject of unidentified devices, my mum found some fireworks the other day so we let them of and they made about 40 really bright flashes, when i dismantled one of them, it appeared to be a large lump of plaster of paris and was about the size of the on button for a desktop computer, any ideas what they are?

i don't know the official english name, but i think they are the Strobes.
it's an effect i like very much and once upon a time i found the comp formula... now i lost it...
if anyone can add info about...

[Seymour]

They're strobe pots indeed. The ones we commonly get in NZ are red, green, yellow and white.

They could be made either of two systems. Using the nitrate/sulfur/Magnalium/Chlorine donor system, with Barium nitrate without a Chlorine donor giving White, Barium nitrate with Chlorine giving Green, Strontium nitrate with Chlorine giving red, and a mixture of Barium nitrate and strontium nitrate and a Chlorine donor giving yellow, orange, or any shade between red and green.

The other system would be Ammonium perchlorate, Magnesium and Sulfates, with Strontium sulfate giving red, Calcium sulfate giving orange and so on.

If the nitrate method could be tweaked to work well it could be more economical than the AP ones. Whatever they use, it's better than I've managed!

[madmandotcom]

ok then, thankyou, would pottasium perc work in place of ammonium perc?havent got anything that can heat my mg enough to make magnalium

[Mumbles]

No.

[Seymour]

And you know, MgAl can be made on a wood or charcoal fire if done right. You only need to get it to 650 deg C to melt Mg and 660 to melt Al.

However, got to be careful, Molten Mg or MgAl is certainly very dangerous.

Fortunately there are thousands of new things to try with the chemicals you already have while you wait for a few years to have the knowledge and supplies to make advanced and difficult effects like coloured strobes.

Edited by Seymour, 04 June 2011 - 09:52 PM.

[madmandotcom]

ok then worth a shot, thqanks for all your input anyway