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As I was taught in the Army, when you pull the pin, Mr. Grenade is no longer your friend. (Original Post) COL Mustard May 2023 OP
Grampa Had A Live Grenade ProfessorGAC May 2023 #1
I thought the same thing. COL Mustard May 2023 #2
As To Your OP Lesson... ProfessorGAC May 2023 #3
I always enjoy your explanations COL Mustard May 2023 #4
WW2 vet probably? DetroitLegalBeagle May 2023 #5
If it was a WW2 era grenade COL Mustard May 2023 #8
Yep, I'm wondering if pulling.the pin was enough shock to detonate it DetroitLegalBeagle May 2023 #12
Oh, I used to do it with my teeth... COL Mustard May 2023 #13
Lol DetroitLegalBeagle May 2023 #14
Sounds like a country song. The MAGA version. Baitball Blogger May 2023 #6
Goddamit, Gramps. Iggo May 2023 #7
Last August the police found a mortar round? Grins May 2023 #9
Found on a property Old Crank May 2023 #10
That's a hell of an inheritance to leave... ZonkerHarris May 2023 #11


(66,904 posts)
3. As To Your OP Lesson...
Sun May 21, 2023, 03:31 PM
May 2023

...in the military, yes a grenade nearby is nobody's friend.
I fear too many people think it's just a big firecracker.
But, higher density means more mass for its size, a 40% higher energy per unit mass, and about 9x the velocity.
The pressure wave & gas volume at that velocity leads to 12-13 times the pressure. One is eardrum damage, the other is dead.


(2,055 posts)
5. WW2 vet probably?
Sun May 21, 2023, 04:36 PM
May 2023

They brought back all types of stuff after the war. I know a guy who's grandfather brought back a bunch of captured nazi machine guns. Has capture papers for all of them. That collection is worth a small fortune now. Just 2 of the guns are worth 50k each.

That said, for the grenade. Yea, they definitely got brought back even though they weren't supposed to. Guns could be brought back easily enough for the most part. Explosives not so much. But they are small enough that they could be easily smuggled back. It's not like they checked every single bag and crate on the way back home. Finding grenades while cleaning out a vets attic or basement isn't very common, but it's hardly rare.

COL Mustard

(6,260 posts)
8. If it was a WW2 era grenade
Sun May 21, 2023, 05:10 PM
May 2023

It was probably made with TNT as the explosive fill. That can get very unstable over time. That’s why we put a service date on munitions, and why we store them under controlled conditions.


(2,055 posts)
12. Yep, I'm wondering if pulling.the pin was enough shock to detonate it
Sun May 21, 2023, 07:26 PM
May 2023

I'm sure you know that pulling a pin isn't as easy as they show in the movies. It takes a bit of yank to do it. Pretty much everyone doing it would be holding it with the spoon down, so unless they were dumb enough to let it go and fly(which is not out of the realm of possibility considering they were messing with a grenade) then the shock of yanking the pin might have been enough to detonate it if the tnt filler was unstable enough.


(7,479 posts)
9. Last August the police found a mortar round?
Sun May 21, 2023, 05:12 PM
May 2023

And didn’t search the hell out of that property? And they didn’t wonder what else this old crackpot might have had?


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