Lift Charge - Sucessful

[jaysgoh]

I get one small tube , 1.3cm ID and i put my 1cm star inside . i put 1g of lift powder , its pssst and shoot up to 10ft+ . i think this is awesome for me !! its works !!!

 

But due tto slow productions of BP , its hard to produce 1kg of bp ....

 

So , First Mini Star Mine - Works !

Second Toilet Roll with dummy cylinder plastic bottle - if fits snugly inside the tubes . I use 5g of lift and the weight of the plastic bottle is 14g . the plastic bottle i but two visco fuse act as time fuse , one dragon egg star and one meal powdwer . still left 1/3 spaces , i push down some tissuie . I will fired this two hours later .

 

I got 4 2inch ID Paper Tube and 51 CM long,1cm thick from my friends . the largest tube ... i ithink i stick to 2inch

2inch .. how to make 2inch hemisphere ?

Edited October 8, 2013 by gohjiejing

[jaysgoh]

Second Test , http://www.youtube.com/watch?v=2HgkD3_9W5I&feature=c4-overview&list=UUSltuw3o5JYulI0d4jga2JQ . Fail .

 

How about my Lift Charge ?

[AdmiralDonSnider]

Judging from your data this seems highly inefficient. 1grams of lift powder are capable of lifting a 30mm bombette to 30 meters. Much depends on the granulation, compaction (use of disk, tissue etc., wads etc), fit of the projectile, but this still seems a lot for a star that small. I remember I usually use about 0.1 grams of 3/4FA to lift similar stars with tissue on top as a star gun test.

 

Now I´m still not sure if you granulated your powder in any way. Did you?

 

I do not intend to break your enthusiasm in any way, but go terrible sure funny dissecting and recombining commercial compositions and garnitures is not your style of pyro, as this can and will sooner or later go wrong. I do not intend to sound harsh, but neither your video postings nor your latest forum contributions give me the impression that you exactly know what you are doing. It surely is too early for you to proceed into shellmaking, before even having managed basic methods and before having got your facts right. Star guns and lighting powder can be fun, but shells are essentially projectiles that can seriously harm both people and property when their properties are not exactly known. Really, do it the long way or don´t do it at all, for your and your peoples sake.

Edited October 8, 2013 by AdmiralDonSnider

[nater]

You should NEVER lean over a loaded device like that, ESPECIALLY while lighting it!!! That is an extremely dangerous habit to get into. Loaded mortars need to be treated like a gun. Never put anything over it that you don't want to loose. For a point of reference, if you place a piece of 3/4" plywood on top of a 3" mortar, the lifting shell will punch a clean hole in the wood and still function properly and at the intended height. Is your face stronger that that?

 

My advice? Quit messing with live pyro and review how to do it safely before you are mature enough to continue.

[ollie1016]

Judging from your data this seems highly inefficient. 1grams of lift powder are capable of lifting a 30mm bombette to 30 meters. Much depends on the granulation, compaction (use of disk, tissue etc., wads etc), fit of the projectile, but this still seems a lot for a star that small. I remember I usually use about 0.1 grams of 3/4FA to lift similar stars with tissue on top as a star gun test.

 

Now I´m still not sure if you granulated your powder in any way. Did you?

 

I do not intend to break your enthusiasm in any way, but go terrible sure funny dissecting and recombining commercial compositions and garnitures is not your style of pyro, as this can and will sooner or later go wrong. I do not intend to sound harsh, but neither your video postings nor your latest forum contributions give me the impression that you exactly know what you are doing. It surely is too early for you to proceed into shellmaking, before even having managed basic methods and before having got your facts right. Star guns and lighting powder can be fun, but shells are essentially projectiles that can seriously harm both people and property when their properties are not exactly known. Really, do it the long way or don´t do it at all, for your and your peoples sake.

Very fair to say.

[schroedinger]

Read what the people tell you, your really risking your life"!!!

 

If i see your data, i would think that you can get much more lift powder out of your BP. If you use a 13 mm ID tube for a 10mm star, your having 1.5 mm space at every side, thus meaning that 23% of your ID is space for lift gases to escape without doing any lift work. To much!!

a 12.5mm star would be much better, as this would have a snug fit.

 

You plastic can test, looks to me a little useless, as is doesn't weight much compared to the size and so it gets stopped very fast by air ressitance

[jaysgoh]

Okay , i think i have to leave making fireworks for awhile and read more , sorry for disturbing guys .

Have a Nice day .

[jaysgoh]

Thank you for the advise. I think bout sometimes.. I really not ready for pyrotechnics.. Can anyone guide me what to do or what to make first for me?

[Bobosan]

Work with your black powder to improve it but do it safely. As your BP improves, so does it's power and other forum members can attest to burns caused by lighting piles of comp with handheld lighters. Right now you are limited to mortar and pestle and screening the mix. That method will make BP good enough to practice procedures like granulating or corning. Nobody wishes to hear about you getting injured.

[jaysgoh]

Okay.. I looking forward to build a ball mill. Thanks..

Just a newbie questions. And I wonder

People said shells or cylinder shell don't need to really tight fit in tube just snugly fit enough. But what if some shell maker over paste the shell and it will tight fit in the tube, will it blow up the end plug or push up? Or even burst inside the tube?? Between what does end plug make with? Clay?

[taiwanluthiers]

I stopped using bic lighters when I discovered how painful visco burns can be... get a microtorch so you can light it from a safe distance without winds getting in the way.

[Bobosan]

Okay.. I looking forward to build a ball mill. Thanks..

Just a newbie questions. And I wonder

People said shells or cylinder shell don't need to really tight fit in tube just snugly fit enough. But what if some shell maker over paste the shell and it will tight fit in the tube, will it blow up the end plug or push up? Or even burst inside the tube?? Between what does end plug make with? Clay?

 

The pyro shellmaker knows what the inside diameter of the mortar is and builds his shell to properly fit and at same time, allow for free movement.

All the things you mentioned can happen with too tight a fit of shell to mortar. Sometimes the shell goes up but not high enough and you get a low break.

Most mortar end plugs are made of wood but other materials have been used.

[SideGlance]

yeah be safe hovering over the gun while lighting the fuse to not smart...

[jaysgoh]

Paulownia better or willow? Edited October 11, 2013 by gohjiejing

[Seymour]

In my opinion Paulownia is better.

 

However they are similar, some people will say willow.

 

In spollettes my Paulownia burns at 14mm/sec.

[jaysgoh]

I hope this doesnt make someone angry .

 

I Make a dummy cylinder shell fill with flour salt and sugar , wrap like normal shell . weight is 106g and i use 10g of lift see wether my bp okay ( too much dextrin ) and i make my plug with durham clay .

 

Quick questions , Do Terylene Cotton can use as quick match ?

[schroedinger]

Did your dummy shell get up to the right altitude? If yes sound god to me, as there is normal the 10% rule, for use as lift.

 

If your not reaching the right high, maybe really try a little less dextrin or a finer grade of BP granules.

 

Terylene is made out of poly ester, so it`s a kind of plastic, but you want to use stuff made out of real cotton

 

 

[jaysgoh]

Do real cotton really feel soft and tiny? Sorry. Here almost everything from China and they didn't mention what's it. Just write string

[jaysgoh]

I really scared the lift will blow in tube... My mortar plug is 4cm thick and my tube is 51cm long and 1cm thickness. If my shell too tight, it either blow the tube by wide or blow the plug Edited October 11, 2013 by gohjiejing

[Mumbles]

If the tube or plug blows you'll know it was shitty anyway. You'll need structurally sound mortars to fine any real shells.