Dude it is the Everlasting Gobstopper of engineering comedy.

I was discussing it with my cousin pretty much all night last night and it became clear that Spinlaunch has made no provisions for the hypothetical counterbalance that uhhh they're totally going to want to let go of once their "11,200 kg" payload isn't being constrained in a 45 meter arc at 450 RPM.

11,200 kg experiencing 10,000g has the effective weight of an Aframax crude tanker.

In order to, you know, not put a bearing load equivalent to an Aframax crude tanker on your driveshaft you would ideally let your counterbalance go the same time as your payload but unfortunately they appear to have planned a control room there.

Which is probably okay because frankly? Flinging eleven metric tons into the ground at Mach 7 is not ballistically dissimilar to Tunguska. So I guess you could imagine a structure capable of carrying an unbalanced load equivalent to an oil tanker through 90 degrees at 450rpm but that's the sort of phrase you don't usually see this side of the event horizon.

The best part is you've got a discus with an effective weight that makes the top ten on this list but you think it's a javelin, and once it "breaks the seal" your three-Goodyear-blimps-worth of hard vacuum is going to eagerly slurp down the incandescent star you are making right at its mouth so if nothing else, at least the electromechanical apocalypse you've instigated will happen in a 6000k environment.