Dragonsinger

Creepin_pyro

Not surprised if it doesn't work. You have 106% there!

Ammonium Perchlorate 51%
Zinc powder 37%
Di Cyan Di Amide 6%
HTPB 6%
Di Iso Cyanate 0.6%

Once more guys
Thanks for the encouragement.
I've had a bit of a sideways think about this and I reckon I MIGHT just get away with about a foot of Visco wound through a wood former [soak it in borax as a fireproofer] so that I get the 20 or so seconds burn time I need. It will need to be a serpentine wind to prevent multiple burn points but I hope that "THIS" will do the job. It may be a while before I can get to this, Christmas etc, but as soon as I pick up some visco I'll have a go.
If you want to know why it's called an Errol read "Guards Guards" by Terry Pratchett.

Thanks again
Jim

Thanks creepin_pyro.
I've broken out the AUTOCad and am currently drawing up plans for a motor with about a foot of 1 strand of Visco (a lump of broomhandle with a central hole and several fuse channels [holes] to let me wind enough Visco for a 20 second burn. Might try a spiral channel as well.
I want to try the visco rocket first. Could be fun.

Regards
Jim

Hi Guys
Dumper truck quoted Dr thrust

this looks promising
A slow burning propellant. Great for sustainer engines.
Ammonium Nitrate 70%
Ammonium Perchlorate 10%
Polyester Resin 18%
Powdered Charcoal 2%
Not very powerful but useful. The charcoal helps keep the combustion steady.

First up Thank you Dr Thrust for the formula

Second Dumper Truck said

As far as i am aware in the uk Ammonium Nitrate is hard to find due to its other uses so it may be difficult for him to obtain any.

I have about 2 kilos of the stuff at home right now. Fully legal and above board. You can get it over the counter at most chemists if you know the correct product
to ask for. No I can't tell you on an open forum since we are not the only ones who READ this board. But you can buy the stuff legitimately for other uses.
I am not worried about the danger since it requires shock detonation and I am reliably informed (I have never tried it) that it is hard to light. It is also as
hygroscopic as hull so it rapidly becomes a useless mass (the chemical reaction renders it inert) with even a whiff of water vapour.

As the motto of the Sirrius Cybernetics Corporation says:- "Share and Enjoy"

Thanks again for the tips

Regards

Jim

Hi Guys
Has anyone tried "THIS" and can we get the Visco fuse here in the U.K?

Thanks
Jim