Looks like it's okay for targeting someone's base. But for ship to ship this has about as much use as a Polish target pistol in a gunfight. It'll probably be more detrimental to the ship launching it than the ship it's being launched at.

How can i fire it

i can also make a bigger torpedo

I mean, like, REALLY REALLY big

Do you use any speed mods? Because it surely doesn't penetrate nearly that much for me.

Thanks for sharing though

In my tests vs my standard 9-layer of homogeneous HA this cube managed to penetrate it in 50% of tests, so 40 layers is a bit of exaggeration. I haven't tested it vs spaced layers, like you did in the video though.
The same (or better) penetration can be achieved with two-block torpedo (merge + drill). Of course, this cube offers better collateral damage. I have a gravity missile with a frontal part using the same concept, but it's 2x2 in frontal projection, and does delayed warhead detonation after initial penetration.

I've been following this on Reddit. Thanks for posting :)

dude it can punch through over 40 layers of heavy armor, and 144 light

guess i better start making bigger ships

like really big

basically just an entire impenetrable sheild

I saw this on reddit man. its amazing.

hmmm ... Looks intresting