I did a burntime test for my CIA blackpowder.
1.07sec for 52cm distance. I?ll repeat that test several times to find the average burntime.http://www.zippyvide...20006/untitled/
EDIT: It was almost 60cm for the 1.07sec...
I did two further tests: Both bp trains were 50cm long. The one took 0.84sec the other one 0.76sec.
I compared these values to the one from Dan Williams. He uses pressed and corned black powder with charcoal from a willow type tree.
You can see that my bp is much slower the pressed and corned type. (My average value with a third value is 1.6sec/100cm)
So the CIA bp burns at about 63cm/sec! Dan williams best value is 185cm/sec and the lowest 153cm/sec.
These values are ok I guess, I always used to use it with every device I make.
Edited by paul, 12 October 2006 - 12:19 PM.