HOW IT¡¯S DONE IN JAPAN
The vast majority of the displays in Japan are now fired electrically. Only the smaller displays in some of the really rural areas might still be fired manually.
I like the way the most Japanese companies do it. They order their shells from China with NO LIFT and have the time fuses covered with a paper cap. Tests they did of unintended ignition of a single aerial shell in a carton resulted in very few conflagrations, and even then it was limited to perhaps a single carton; the rest was a whole bunch of cartons and shells being kicked out by the initial shell functioning ¨C but not igniting.
They have clear cellophane pouches of black powder with an electric igniter, with the appropriate amounts of blackpowder for the various sizes of shells. The shells are shipped separately from the pouches of black-powder with the igniters.
At the display site, they charge the mortar with the appropriate blackpowder pouch and igniter, remove the paper cap over the time fuse and then load the shell into the mortar with a string or rope on the top of the shell.
If there is an unintended ignition of a shell in a magazine or during transport, it really reduces the potential for a massive explosion because there are no leader fuses or lift charges on the shells to rapidly spread the fire. If there is an unintended ignition of the pouches of blackpowder with the igniters in a magazine or during transport, there will most likely be a big fireball or small explosion; but no large explosions or conflagrations because there are no shells with the blackpowder. It is simple, effective and inexpensive.
ONE COMPANY¡¯S EXAMPLE
Gunsmith of Kunitomo uses heavy gauge stainless steel mortars which are welded onto pallet size stainless steel bases that require small cranes and forklifts to move.
His destructive testing of the mortars resulted in ZERO failures. He spent hundreds of thousands on the mortars which are all stored inside a large warehouse. He also has to spend a lot to move them and set up a show ¨C but he doesn¡¯t have to worry about mortar failures or rack tip-overs.
The other thing that impressed me was the Japanese insist that high quality time fuse is used and that it must be crossmatched both inside and outside of the casing.
This increases the costs but significantly reduces the chances of duds.
They also used WANO blackpowder for the lift, and a number insisted on shipping WANO blackpowder to China for the break charges as well. They also required testing of the chemicals prior to making stars and effects, following their standards for shell casings, etc., PLUS a number of quality control steps that were recorded and reported.
The Japanese also insist on having EVERY shell packed in a plastic bag that is sealed, then packed in an individual box for that size shell, and then packed into a shipping carton with an inside liner. This makes a huge difference in the event of some external heat, spark or flame because it makes it less likely there will be fire transfer to multiple shells in a carton, much less from carton to carton.
The Chinese factories that manufacture for Japan often have experienced Japanese technicians that work in the plant to ensure everything meets their standards.
This shows that the Chinese can and will make better product provided the buyer insists on the higher standards, is willing to pay for it, and puts someone knowledgeable and trustworthy in the factory to both help and supervise with production.
When I toured his facilities, the wood floors reminded me of a permanent basketball court. They were level, square and tight as could be (no loose powder in the cracks). The workers all had special slippers in each magazine and process building. The rule was one had to take off their shoes and put on the slippers inside the magazine. There were only a few pair of slippers in each magazine or building so no more than 2-3 people could be in any one magazine or building at a time.
Expensive? Sure, but everything in Japan is expensive. At the same time they have a lot fewer problems due to malfunctions and really, really good shows.