[USNBandit]

I didn't ask the question. I was making fun of my posting error.

I thought I read somewhere that those grenades are spin fused. The fuse counts the number of revolutions to judge distance down range. Of course now I can't find the article I was reading about it.

[Spktyr]

I think it used the spin counter to determine time, since a standard quartz timing system would be destroyed on launch.