dave

is it true that phil cooper has resigned from being chair ?

 

if so why has nothing been posted ?

here is an unusual composition for a re usuable squib spark effect

http://dsspropulsion...SDS-15Feb17.pdf

http://dsspropulsion...-Info-Sheet.pdf

Ingredient(s): Hydroxylammonium Nitrate/Ammonium Nitrate/2,2'-dipyridyl/Ammonium Dihydrogen Phosphate/Water/5-aminotetrazole

http://dsspropulsion....1-Picture1.jpg

check this video out.
the doughnut is at about 4-08 secs
 
looks like a relatively simple welding job to create

spectrum,
 
is it possible to suggest a solution to the problem of "chuffing" with the following composition

from Lancaster, 3rd edition, page 326

                                            Weight
                                              (%)
Cinnamic acid                        27
Potassium chlorate                29
Lactose                                  29
Kaolin                                    15

 

when compressed as a cored pellet, it chuffs like a steam train

sucrose better than lactose ?

any chance of a coloured smoke section ?
 
WHITE SMOKE
methyl anthraquinone         44
potassium chlorate             24
sucrose (icing sugar)          19
kaolin                                  13
 
i'm GUESSING its quite close to the composition used in the L132A1 current issue military smoke grenade.
 
100g hand tamped burns for about 45 - 60secs with good emission rate
 
ok, correction due, the L132A1 current issue military smoke grenade is based upon a cinnamic acid composition