A few years ago, I saw a black and white video from (I believe it was the Spanish Civil War) of men slinging a grenade underhanded from a roof.  But I can't find it anywhere.  Is there an archive of that somewhere?

Sarosh wrote on Oct 19^th, 2021 at 3:36am:

That wasn't the one that I saw, but it was equally cool.  Thanks!

Curious Aardvark wrote on Oct 20^th, 2021 at 10:15am:

I know I wouldn't be doing any Fig 8 style sweeping around my head with a grenade

which is why I have been mentally designing a more user friendly, modern grenade and sling system

The sling has a little rfid tag bult in and the grenade has a rfid reader.
Powered by a simple cr2032 battery with one of those plastic tags, so the battery stays fresh till used.
It should power the reader and detonator setup for a couple days at least.

So you load the grenade, set the time and leave it in the sling.
You have one button and a double digit readout, that allows you to set the timer for 1-99 seconds.

The countdown only begins when the grenade can no longer 'see' the rfid coil.

ie: after you've thrown it !

Kit also comes with a sling clip, so the grenade won't fall out till you remove the clip and throw.

That way you can set up a whole bunch of them, armed and ready to go at a moments notice.

And we'll keep them tennis ball sized. That's plenty of volume for whatever you want to pack inside the ceramic casing:
phosphorus, hi-ex, frag(hi-ex core surrounded by ballbearings), smoke, 'just' flash bang  etc

Given how much money modern ordnance costs, these things would be cheap as chips.
And silent in operation with a potential range of 100m plus !