Celebrating New Year's in Thailand. By all probability the rockets were powered with a form of "home brew" black powder. This "helicopter" is well engineered, balanced and trimmed. It appears to be made so well, that it is recoverable. I watched four guys one afternoon in Thailand, sitting on a bamboo mat with mortars and pestles grinding charcoal. Two of them were working the mortars and the other two were mixing the other ingredients, I was made to understand were salt-peter and sulfur. What was "striking" about this scene, was that all four of them were smoking Thai cigars. Needless to say...I kept my distance. BTW...Later that day, I got to shoot my brother-law's muzzle loader with some of that very powder. It worked quite well.
Norm