Here's what I think I'll try next on the powder dumping. I'm going to wrap the powder into a piece of plastic wrap, and attach a string to the bottom of it and attach the other end to the landing gear or something on the plane. (I didn't mention that I'm doing this with my Sr. Telemaster and not the Herk.) When the bomb bay doors open the bag will drop and the "static line" should stop the plastic wrap and cause the powder to fall out the bottom of it. Of the three I dropped, two of them didn't open and just fell to the ground, plastic wrap intact. but the one that did open looked very realistic with the red chalk dust. Looked like the red slurry they drop. I know that putting loose powder in the bomb bay would make a real mess and probably all leak out due to vibration before the drop.
I have dropped 3 or 4 golf balls at a time and that works real well. But for some reason, when I announce "Golf balls coming down", all the other guys seem to want to get their planes under something!
Randy