5 replies to this topic

[OnePoundMarc]

If there is anyone out there that has questions regarding this topic i am more than willing to help you get where your going either by press or by hand,after doing this for 40 years i might know something?my choice of heading changes from cans to 3'' round shells,Marc

[dr thrust]

hi Marc welcome to the forum, please share some of your work with us

Edited by dr thrust, 09 July 2011 - 09:19 PM.

[OnePoundMarc]

hi Marc welcome to the forum, please share some of your work with us

Ive been out of wack for a while my machinist ruined a very expensive custom tube supprt for my press,itsgreat to be here though,the pyro scene in the states,well what can i say a load of really pompus.... i joined the PGI in 86 but its the same old load of ani so i thought letsgo back to the mother country where i first began taking apart rockets from Brocks etc..,how do i go about posting pictures of some kick ass tools? you lot do any one pound stingers over there? stickless finless rockects about 2.5inch x 3/4 bore? put one of those on top of a one pound Bp and let that thing rip or though i have done it whistle comp or mix up the p benzoate with Na benzo whislte fart whistle fart,totally mad. I have no idea whats going on over there,i hear you lot cant make flash powder?what are the rules over there ive only been gone 35 years,thanks for the welcome mate

[Peret]

the pyro scene in the states,well what can i say a load of really pompus.... i joined the PGI in 86 but its the same old load of ani

ROTFLMAO Passfire, what can I say. PGI, run by the same crew, and they hold their annual events in a mosquito-infested swamp during the monsoon. Come and join the WPA - we have two major events a year and can pretty much guarantee the weather will be good for both.

Unfortunately the rules in Britain seem to be that you can't make any fireworks at all, but that's just one of 1001 oppressions the Brits have to put up with. I would never go back.

[44RedHawk]

If there is anyone out there that has questions regarding this topic i am more than willing to help you get where your going either by press or by hand,after doing this for 40 years i might know something?my choice of heading changes from cans to 3'' round shells,Marc

I have had successful results using standard 75-15-10 black powder mix in 1lb rocket motors with the addition of 3% petroleum jelly. The caveat here comes with my lack of formal chemistry background to offer any potential incompatibility or additional safety concerns with this mix.


This solution was inspired by frugality and the need to utilize an existing batch of 75-15-10 and a lack of KN03 for fresh rocket mix. A little web research revealed that petroleum jelly was used extensively by commercial manufacturers of high energy compounds to reduce friction in pressing operations adding greater production and storage safety. I decided such would be relatively safe in a black powder mix in percentages similar to a Potassium Perchlorate / Salicilate whistle mix and so on with my experiment.


I began with an existing 75-15-10 hand blend + 5% dextrin that was slated for polverone. I selected 2lbs to which was added 3% petroleum jelly diluted in a 2:3 ratio of mineral spirits hand blended in a stainless bowl 5-10 minutes then placed on kraft paper lined tray to evaporate off the mineral spirits. The resulting powder is dust free with the consistency of fine loam that compacts very well in a parallel wound paper tube. This mix was hand rammed in 3/4" ID X 8" L hand rolled 70lb virgin kraft tubes with Wolter 1lb core burner rocket tooling and standard bentonite clay nozzle and plug (NO grog). This is a HOT mix with incredible thrust minus the expected cato from a 75-15-10 blend.


Any feedback, constructive criticism, observations or ideas would be greatly welcomed.


-Enjoy

[athelas3]

I have withdrawn this post - its contents are no longer applicable.

Edited by athelas3, 15 September 2011 - 10:02 AM.