what do you think about my blackpowder coated rice hulls ?

[superspike23]

Hi ,

 

I made rice hulls coated with black powder.
For black powder, I used 70g KNO3, 18g vine charcoal and 12 g of sulfur.

I need your opinion

here is the video.

http://www.youtube.com/watch?v=BRv8OGpRLz0&feature=share&list=UUlrHWRVpLwNwtNgHEZaS4Ow

 

Thank you!

[pyrojig]

It is decent . Fast enough to do the job. It can be sped up by additional milling , and I have never had a issue using the standard 75-15-10 +5% dex. Most of the diff . comes in the charcoal used. I use hot paulownia , willow, and or pine for burst. It is exceptionally fast . A pile goes up instantly with a thump( coated at 5-1, 0r 7-1). Almost explosively . I use the more consistent charcoals for lift, like willow and pine. The two keys to get faster stuff, is longer more efficient mill times, and the charcoal used.

[psyco_1322]

I would suspect just the formula to be slower in general. You drop some oxidizer and add more fuel, that's not making it faster. Try the 75:15:10. It actually looks pretty slow compared to most milled bp hulls I've seen. If you didn't mill it, that is going to make it slow also.

[Mumbles]

That formula is pretty common when using vine charcoal actually.

[psyco_1322]

That formula is pretty common when using vine charcoal actually.

 

Ok, I was kind of wondering that actually.

[Mumbles]

I've always sort of known about this. It's common in Europe where vine charcoal seems quite a bit more available. There also seems to be something unique about European vine charcoal that makes it more reactive than anything we can buy or make here in the US. Variety, growing conditions, old vs. new growth, climate, who knows.

 

It's always made me wonder if some "lesser" charcoal might actually just benefit from a slightly modified formula. The 70:18:12 formula could help if you had high ash charcoal.

 

In any case, you can really only tell how good a batch of burst or lift is under sort of realistic conditions. Burning a pile on the ground can give you a vague idea, but you'll never be able to really tell unless you use some sort of tester or use them in a shell. Pressure is key to really judging performance.