You don't need DOA in your propellant. It just makes it mix better and you get a softer cure. Here is something I ran a while back:

79% AP 200u
1% Mg
13% HTPB
2% PAPI
5% DOA
1 drop silicone oil per 500 grams as a surfactant

Nothing fancy. Just a basic propellant. Still cured fine and tested well.

Edward

Just looking to make things easier to cast. I will be trying something like this for my first batch.

60% AN
15% MG
4% AL
1% Lampblack (opacifier, I may not use this)
20% liquids (R45HTLO, E744, DOA maybee)

I am planning to start testing this in PVC motors on the test stand I just finished for characterization.

Thanks Edward. I am still out here and am still ordering up tubing from that source you gave me. Do I need to get graphite for nozzels, and aluminum stock for bulkheads on order or is that easily found locally?

Jeez,

What are you going to call it? "Heavy Metal"?

I'm just an amateur, but that seems a bit hot with the metals.

Jeez,

What are you going to call it? "Heavy Metal"?

I'm just an amateur, but that seems a bit hot with the metals.

60/20/20 is a very common AN formula.

Tony

ALRECO has plenty of hockey pucks for forward closures. Graphite is hard to source locally. I get it from NAC Carbon.

Edward

Major Tom, JamesR here. I have lots chemica for research and if you have any problems getting anything I do not have, I can help you get it. I personally like also but love the long burn time of the Ancon.

I have seen some formulas with 3 to 5% AP added to the AN to help with the burn and I would think it might help with ignition.

do you have a copy of John Wickman's book? If not I could lend it to you.

Major Tom, JamesR here. I have lots chemica for research and if you have any problems getting anything I do not have, I can help you get it. I personally like also but love the long burn time of the Ancon.

I have seen some formulas with 3 to 5% AP added to the AN to help with the burn and I would think it might help with ignition.

do you have a copy of John Wickman's book? If not I could lend it to you.

James, I do have a copy of his book. In fact I went up and took his class a while back. I have been able to source most all of the items I have been looking for and have made a couple of small test batches to test my curing ratio and ignitability and such. the only thing I have had difficulty with is getting fine enough magnesium. Perhaps you know a good source. I can only get a hold of 325 mesh. I am also in the midst of finishing a test stand. I just need to build an insturmentation amp for my sensors and then calibrate the thing. I will then be looking to fire a few PVC motors to get burn times at various chamber preasures for my burn rate characterization. Any advice and tips are greatly appreciated.

I don't have a bunch but I do have some 5mic mag. What size of batches are you doing? I might be able to find more but would have to check with a few people.