1569 replies to this topic

[pudi.dk]

How is a rising comet normally added to a cylindrical shell?

[karlfoxman]

Only just seen your question, I belive they are just placed ontop like a normal shell. But if its a tight fit you may not have enough lift gas to light the prime. In this case the leader could be passed over the comet. I have not seen many cylindrical shells with comets.

On another note, I had a test of a 4" beraq shell today. Inside was 16 1" ID beraq all made by hand like the maltese do. Only difference is I make the hole before filling. But my results prove it works ok, could be made better but im pleased. I was not aiming for a circular break like the maltese shell, this was just to test the beraq. Im going to make some larger more complex beraq shells with 2 and ring seperate rings. Here are some pictures and the test video.

VIDEO

Very sorry about the state of the lens, I did not clean it up and the camera wanted to focus on it all the time

PICS (CONSTRUCTION) http://www.pyrosocie.......26&st=1050#

Cheers

[KarlosH]

Hi. Shimizu maintains, that bees are groups of hummers which flying spirally. Hummers in his book hawe a one hole in the centre of side. Composition with Al.
I had never seen hummers which flew in spirally trajectory, only fast disappeared and humming sound.

How can I make really bees??? Like this:
video.
http://www.hanabi.co...vtr/ginbati.mpg
http://www.hanabi.co...ata/ginhati.mpg
pic.
http://www.srs.ne.jp...abi/Hanabi1.jpg
http://www.hanabi.ne...wa/DSCN0942.JPG
Please, help me. Bye.

Edited by KarlosH, 06 May 2007 - 08:32 PM.

[pyrotrev]

Only just seen your question, I belive they are just placed ontop like a normal shell. But if its a tight fit you may not have enough lift gas to light the prime. In this case the leader could be passed over the comet. I have not seen many cylindrical shells with comets.

On another note, I had a test of a 4" beraq shell today. Inside was 16 1" ID beraq all made by hand like the maltese do. Only difference is I make the hole before filling. But my results prove it works ok, could be made better but im pleased. I was not aiming for a circular break like the maltese shell, this was just to test the beraq. Im going to make some larger more complex beraq shells with 2 and ring seperate rings. Here are some pictures and the test video.

VIDEO

Very sorry about the state of the lens, I did not clean it up and the camera wanted to focus on it all the time

PICS (CONSTRUCTION) http://www.pyrosocie.......26&st=1050#

Cheers

I've seen some shells with rising comet made in an Italian owned factory in China that had the comet fixed under the outer wrap, presumably with a tap off the match to ensure ignition. I'll undo the odd knot and report back with the exact construction next time I;m down the 1.1 store.

[Mumbles]

That bee's question is a rather hard one. I suspect what he refers to as bees are different what what we refer to them as. You might want to look into "z-b**bs". They are something like a stinger, but with two vent holes that are angled backwards. It would provide thrust, as well as the spiral burning you desire. The nomenclature of small spinning/flying inserts gets confusing. There are several names for the same thing, and the same name for several things.

[starseeker]

Hi everybody,
i am makeing a 3" cylindrical shell at the weekend and i was wondering what is the optimum size for the canule,and will i need to add whistle burst to aid the break,
regards,
Vince.

[BrightStar]

i am makeing a 3" cylindrical shell at the weekend and i was wondering what is the optimum size for the canule,and will i need to add whistle burst to aid the break,

From Passfire, the canulle for a 3" cylinder should be 3/4" to 1" diameter.

If you have enough hot granulated BP to fill the shell, it should work well alone. If you're using BP on rice hulls / corn cob, maybe add about 1/8th of the burst mass in whistle for ball shells - eg 50g of 4:1 BP on hulls burst with 6g whistle booster. This is probably similar for can shells, though I haven't tried it yet. Even better would be to work with KP on hulls - this is almost 'dial-a-yield' - the stronger the case the bigger the bang... my next project...

Edited by BrightStar, 11 May 2007 - 09:50 PM.

[starseeker]

From Passfire, the canulle for a 3" cylinder should be 3/4" to 1" diameter.

If you have enough hot granulated BP / pulverone to fill the shell, it should work well alone. If you're using BP on rice hulls / corn cob, maybe add about 1/8th of the burst mass in whistle for ball shells - eg 50g of 4:1 BP on hulls burst with 6g whistle booster. This is probably similar for can shells, though I haven't tried it yet. Even better would be to work with KP on hulls - this is almost 'dial-a-yield' - the stronger the case the bigger the bang... my next project...

Thanks Brightstar,
I shall be filling the shell with chrysanthenum 6 stars with 6% 50-50 homemade magnalium added,when i tested them tonight they have a good hang time and seem to crackle and sizzle as they go.
Vince.

[johndee]

Hi everyone, I have just fired my first aerial shell. It was a 1-3/4" ball shell with D1 glitter stars.



Any comments would be welcomed.

[leosedf]

Very nice johndee.
It had a very good break, i like it

[Pyromaster2003]

That was a very good shell specially for your first try what charcoal did you use for the stars they seemed to have good orange tails?

[maxman]

Here is a 3" ball shell from last night. Stars are Winokur 20 Click here

Any coments would be appreciated

[johndee]

That was a very good shell specially for your first try what charcoal did you use for the stars they seemed to have good orange tails?

I used BBQ lumpwood for the stars as it's slower than willow.

That was a nice shell maxman, a good break and nice stars, I've some Winokur 20 stars drying now, can't wait to try them. Hope mine look as good as yours.

[Pyromaster2003]

Have been planning on trying bbq charcoal in place of pine for ages i will buy some next time im at the petrol station nice one for letting me know.
Nice shell maxman those gold glitters look well better than the ones iv made...pine/bbq charcoal or willow???

[johndee]

Have been planning on trying bbq charcoal in place of pine for ages i will buy some next time im at the petrol station nice one for letting me know.
Nice shell maxman those gold glitters look well better than the ones iv made...pine/bbq charcoal or willow???

Make sure you get lumpwood and not briquettes as they are made up with sawdust and clay.