AP can detonate despite what all of us think.

So now you're saying I have to take the nitroglycerin out of my apcp? Where will all this end? ;-)

Chuck

Oy. Or is it oi?

Chuck

Well, you could put it in the ejection charge. Just watch out for lawn darts. ;-)

John

The demonstrated zero card DDT length for classical APCP is as low as 9 centimeters but as high as 100. Devenais references SNPE tests if you need to look it up. The DOD recently asked DOT to conduct wide area card gap testing on any APCP motor over 6" in diameter.

Anthony J. Cesaroni President/CEO Cesaroni Technology/Cesaroni Aerospace

John is refering to PEG/NG (polyethylene glycol) cross-linked, double base propellant. NEPE-75 is a common trade name. It's origins go back to the 70's and even before.

Anthony J. Cesaroni President/CEO Cesaroni Technology/Cesaroni Aerospace

Hello again KT,

I had a discussion with someone who really knows their stuff and in actuality you do have a point but it is limited. Don't flame me folks but I've been told that there are some very energetic grades of APCP that the MILITARY uses that under the right conditions can be made to detonate. I've also been told that no hobby vendor or Ex'er for that matter can or would be able to safely go there. The additives that are used are close to unobtainium and making the stuff is downright very dangerous. It has been duly documented that our usual grades of APCP one can buy or make cannot detonate and we still have grounds to press for relief through the courts. Donate through either Tripoli or NAR please. A casual modeler shouldn't have to jump through a bunch of hoops to keep a few K grains or whatever around.

Kurt

Anthony

You're giving away all the secrets. But the education is well worth it. ;-)

Chuck

I seem to recall some old Aerojet AP/PBAN formulations that could not be made to detonate at even 60 inches, which would be well beyond 100 centimeters. I guess that would be about 152 centimeters. (I'm not a metric guy.) The data might be in the DTIC database.

John

Anth> The demonstrated zero card DDT length for classical APCP is as low as 9

Detonation and failure of the motor casing are two very different things.

I can overpressurize a tank with steam and have it catastr> I keep seeing posts that say APCP can not detonate. Well you're all wrong.

Anthony

Thanks for the tip, here's my last go at that 'contaminated' apcp.....

Chuck