Italian Cylinder 3" LUPI

[RunBang]

This effect is called lupi in Italian, mean wolf in English. i think it's what you called "hammers" in USA


http://www.youtube.com/watch?v=4MiQHRSc6PQ

ENJOY PYRO!

[PyroJoeNEPA]

Very interesting effect. Great job.

[VikingPyrotechnics]

Really nice shell :D

[RunBang]

Thank you guys!
yes, it was the first shell we've shooted with this funny effect. Next time we'll try it by night, just for see much better the "lupi"

[displayfireworks1]

To RunBang
The effect in USA is called Hummer not Hammer. When I listen to it I can see why the translation is "Wolves" because it has a howling sound. This would be a great effect for a Halloween fireworks display because to me the sound has a spooky effect. I like this sound.

[RunBang]

Oh yes, good idea! 10 or 15 shoots of this stuff should be great for Halloween!
A question, on google translate "hummer" mean nothing in French! what does it mean??

[displayfireworks1]

To RunBang
I am not sure if the "Hummingbird" is native to France, but it is common in United States. Please listen to the noise the bird makes and imagine the fireworks effect. The fireworks noise mimics this bird. This will give you some grasp of the concept.
.
Je ne sais pas si le "Colibri" est originaire de France, mais il est commun aux États-Unis. S'il vous plaît énumérant le bruit et l'oiseau fait imaginer l'effet de feux d'artifice. Les feux d'artifice imite le bruit de cet oiseau. Cela vous donnera une certaine maîtrise du concept.

http://www.youtube.com/watch?v=xn953SUkCKE
https://ideagirlmedia.com/wp-content/uploads/2011/07/Ruby-Throat-Hummingbird.png

[PyroJoeNEPA]

Kellners had a 16 shot 200gram cake called "El Chupakabra" with the same effect only on a smaller scale. Here is the demo video:
http://www.youtube.com/watch?v=Q343pi9K_W0

[displayfireworks1]

PyroJoe
Why does the noise in the Lupi shell sound different. The noise has more of long howling effect. It almost has a spooky sound to it. I think the Lupi shell would be a great addition to a Halloween fireworks display. Imagine what a flight of those would sound like. Here are both video together check it out. I think they are great. They has to be a way they are getting a different sound on those Lupi shells.

http://www.youtube.com/watch?v=4MiQHRSc6PQ

http://www.youtube.com/watch?v=1al92PfXBXA

[PyroJoeNEPA]

Dave- The inserts [tourbillions] in the cake are small-around 20mm and not very large so they would not hold a lot of composition and the holes on the sides of the tube that lets the gases escape are relatively small...so it is a short burn time, short "squeal" and higher pitch. When you have a 3" cannister shell you will have much larger inserts, more composition for a longer burn time, and larger holes for the exhaust gases which would change the tone of the device..also, as it burns, the holes will enlarge slightly causing the pitch to deepen--and also, as it is moving away from you on its way up you will hear a change in the sound--the "doppler effect" like listening to a train whistle as it moves away from you. This particular shell sounded like there were three inserts in it.
The tone is like pipes on a pipe organ--the longer & fatter the tubes are, the lower the pitch is. Smaller length & smaller diamater=higher pitch..also like comparing the sound from a 22 rifle & a 12 guage shotgun...crack vs thud.
There is a lot going on with tourbillions--but I hope this brief explanation helps.

[RunBang]

Oh yes i know thses birds, they are very common in Hawaï. and we also have it in France. so maybe the word "humming" refers to the special flight of this bird...

OH YEEEEES! crazy! i have just heard the 2 videos together, and it's really truthful! so good idea Dave! thank you for this nice illustration

[smilli]

Dave- The inserts [tourbillions] in the cake are small-around 20mm and not very large so they would not hold a lot of composition and the holes on the sides of the tube that lets the gases escape are relatively small...so it is a short burn time, short "squeal" and higher pitch. When you have a 3" cannister shell you will have much larger inserts, more composition for a longer burn time, and larger holes for the exhaust gases which would change the tone of the device..also, as it burns, the holes will enlarge slightly causing the pitch to deepen--and also, as it is moving away from you on its way up you will hear a change in the sound--the "doppler effect" like listening to a train whistle as it moves away from you. This particular shell sounded like there were three inserts in it.
The tone is like pipes on a pipe organ--the longer & fatter the tubes are, the lower the pitch is. Smaller length & smaller diamater=higher pitch..also like comparing the sound from a 22 rifle & a 12 guage shotgun...crack vs thud.
There is a lot going on with tourbillions--but I hope this brief explanation helps.

Thanks for the explanation!

Germany has a small hummer cake with low hums.

http://www.youtube.com/watch?v=Vndz5hcK7Z4

[PGH_Pyro]

sounds exactly like 'zippers' or "speed-balls" here in the USA only with a lift charge to shoot them out of the cake initially .