18 replies to this topic

[Rhodri]

Hi there!

Following on from italteen3's post.....

-----> miniskinny: What problems do you have or envisage having using BP as a lift agent?

[miniskinny]

well, I have had problems with putting in too much lifting charge, (I'm not sure precisely how much I put in) and having the shell getting partially shattered. I have only used home-made shells (about 2-5 layers of cardboard, wetted down, and molded into a customary shell-shape), 3 inches in size. I have never actually put any mixture into them for the reason of them getting shattered, safety first!
Thanks for addressing my problem Rhodri,
mini

[Yugen-biki]

well, I have had problems with putting in too much lifting charge, (I'm not sure precisely how much I put in) and having the shell getting partially shattered. I have only used home-made shells (about 2-5 layers of cardboard, wetted down, and molded into a customary shell-shape), 3 inches in size. I have never actually put any mixture into them for the reason of them getting shattered, safety first!
Thanks for addressing my problem Rhodri,
mini

Do you paste your shells (glue on paper straps in layers on the shell)? And how many layers?
10-15 layers of kraft paper is how many you need (3" shells). And filling yor shell with something will help to increase the strength.

The 2 shell halves I use to put togethr a shell don't need to be very thic. Maby 3-6 layer of A4 copy paper.


And the layer of craft paper put on (pasted on) may wary. I have found that less than 10 the shell will not function as supposed (shatter in the mortat, not spread the stars any good).


I have never had any problem useing BP as lift. But I have had great problems useing green powder .

[miniskinny]

Thanks Yugen...I think I found my problem. I wasn't using enough paper for the shell coating. I'll start experimenting, trying to find the right amount of lift.