[8D]Been there done that. Your not going to get anything remotely satisfying as "bomb simulation" unless you use some sort of propellant. I have a simple and very effective impact detonation system I've used many times, and as long as you are safe and logically concientious with its use, it will work safely and effectively. I will tell you though, that you CAN blow your face off with it if you do not use the normal requisite safety steps, and it will in no way be my fault, only yours for messing with it in the first place. That being said, I have succesfully dropped numerous impact detonated charges from my plane. Its a lot of fun. I live on a farm in the middle of nowhere. The AMA means little to me save as a suppository, (yes I chose this word correctly in place of repository) for a bunch of rules with which people with too much time on their hands can brow beat others. Frankly, I'm not interested. This is a fun sport, not a court room. Just use your brain when handling these things so you don't end up in one!!! Are the original posters of this request still interested in this design? Or have you been deterred by all the flak?? If you would like me to give you the details, I'm sure there is a confidential way to do it, so some 12 year old with no parental supervision whos following this will not use it to kill himself. Let me know, and we can PM (can we do that here?) or email each other. By the way this design can be constructed out of common items, and will detonate anything from a flour bomb, to a full on metallic casing. Your choice.

Regards ZZ.