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Has anyone tried this rocket fuel?

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Author	Topic: Has anyone tried this rocket fuel?
*Igenx* Frequent Poster	posted January 27, 2000 04:29 PM I was looking around at pyrotek.org, and was reading about an engine made "of a rubberized paste containing a mixture of Ammonium Nitrate, Magnesium powder, HTPB(liquid resin binder) and a hardener". Has anyone tried just AN, magnesium and some binder as a rocket fuel? How does it preform?
Ho ju Moderator	posted January 27, 2000 05:29 PM well i am sure (although i have not made it myself) that the AN and Mg would burn very well because AN and Al makes a DAMN GOOD propellent. and i am assuming using mg instead of al is going to be better anyhow ------------------ -Knowledge is power, power leads to corruption, corruption is a crime, crime doesn't pay. So if you know to much you will go broke!!! http://members.xoom.com/Splynncryth
*Igenx* Frequent Poster	posted January 27, 2000 06:17 PM Thanks Ho ju
VeHeMT Frequent Poster	posted January 28, 2000 12:18 AM AN MG/AL + binder motors work pretty good. You'll need a core though. ------------------ VeHeMT's Armoury
catch22 Frequent Poster	posted January 28, 2000 02:25 AM Well, thats not actually correct. The purpose of the binder is to hold the propellant together in one mass to keep the surface area constant so the motor wont explode. Not to keep the AN and Al or Mg out of contact, because it doesn't actually do that. Catch 22
catch22 Frequent Poster	posted January 28, 2000 02:28 AM thats funny it looks like HMTD factory's post was deleted, well now my post has no context. Catch 22
HMTD Factory Frequent Poster	posted January 28, 2000 08:33 PM I figured it wasn't necessary after I reviewed the post and I deleted it 2 mins after posting it, I thought they are using powder only so I said "how you gonna make the propelland into a rod?" AN do react with active metals, pyrotechnic factory protect it with slightly oxided layer or cover it with some oil. So a binder will do both.
catch22 Frequent Poster	posted January 29, 2000 03:19 PM I finnaly got around to looking at the pyrotek and just have a few things to say... The first is that where as this is a composite propellant and so is the propellant used by the space shuttle, its not the same. The space shuttle uses Ammonium Perchlorate, not nitrate, and Aluminum powder, not magnesium. It also uses Fe2O3 (rust) as a reaction catalyst. Second, Igenx I have used ammonium nitrate composite propellant and it works quite well. Where as 70 bucks is a bit expensive its deffinately worth it for the book, video and software package. Im considering buying it myself. Catch 22
*Igenx* Frequent Poster	posted February 09, 2000 05:15 PM Cool. I thought about buying the book, but I'm too much of a cheap ass to buy anything just for information. There are 'other ways' to learn about rocketry (EXPERIMENT as I so love to do!!!!!) Do you know if a small amnt of dissolved styrofoam would be a suitable binder?
Ho ju Moderator	posted February 09, 2000 06:19 PM well i am sure an epoxy or epoxy resin would do the job quite well. hell maybe even rubber cement if you do not use to much. ------------------ -Knowledge is power, power leads to corruption, corruption is a crime, crime doesn't pay. So if you know to much you will go broke!!! http://members.xoom.com/Splynncryth
catch22 Frequent Poster	posted February 09, 2000 09:49 PM well disolved stryrofoam might work but, like Ho Ju said epoxy is much better as long as you use a soft curing flamable epoxy. Rubber cement only marginally works I've tried it the problem is, to mix it thouroly you have to thin it with RC thinner and if you cast it into a grain it shrinks and takes a very long time to dry. One formula i've tryed is 75% KNO3 and 25% RC thin the RC and spread it out on a cookie sheet like 3/16" thick and it will be mostly dry in about one hour, after that peel it off cut it square and spray the surface with thinner then roll it around a dowell and let it dry. Worked awsomely for me. Catch 22 ------------------ "I love the smell of napalm in the morning" -Appocolypse Now

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