With the size of the hole in the end cap, I highly doubt there will be any rocket action. The venting is violent, but very short-lived. There is not enough volume of gas produced to provide thrust. With a smaller hole, perhaps but still unlikely. I am anxious to get BigD's back for analysis. I should be able to get a good idea of internal pressures by examining the internals and any structural fatigue. If my estimations are even close, the vent I am putting in them now is more then adequate. If not, I will address it and compensate accordingly.
With the hole in the end cap it is guranteed that any venting will be away from your face and fingers.
If you knew the rediculous things I have done to
batteries trying to get this to happen. I should post a pic of "Franken-Battery", my very un-willing test battery. You folks wouldn't walk near it... yet it remains intact and still functional.
FWIW... Inside the CHUCKS you can see the battery isolator. The disk with the screw that the battery makes contact with. This is a relatively snug fit that will minimize any particulate matter from exiting out the atty end. To hold this in place I had the option of using in internal sleeve (much the way some flashlights are built). I opted to sweat solder in a ring inside the chucks as the retainer. This is a much more structurally sound way as hypothetically should the head cap be comprimised, the internal keeper is not going to move.
How much of this is really needed? Probably alot less than what I have provided. But these are the things that keep me awake at night.
To me, a bomb-proof diamond plate mailbox sounds completely reasonable. Everyone makes fun of me for my rediculous overkill attitude.... until it's put to the test.
That bad ice storm we has a few months back leveled a bunch of trees out at my sisters. Einstein's house had an 8" limb across it in the morning... and they were all fine, no damage to the duck house. It't things like that when I stand back and say "see" that's why!