You posted on this more than three years ago.
They have recently tested a small prototype.
I still have problems trying to visualize how this works.
The still photographs in the link are not much help.
10,000 G during the spin-up! Wondering what sorts of payloads can survive that?
The video linked by “knarf” says the payload is 200 pounds. Fyi... Guidance post release could be problematic...air density...headwinds...release mechanism variations..Also a rocket would have hard time enduring prolonged g forces...hopefully it gets engineered out. I have heard that a high altitude cargo plane outfitted with 4 or five rocket payloads to be released at upper altitude of flight could be a viable option. Could be robotic, so no crew needed.
Consider 200 kg of water. 200 kg of aluminum. 200 kg of sugar. 200 kg of rocket fuel.
All of those things are extremely valuable, and all are extremely expensive to get into orbit.
If you can do it at 5% of the cost, with a centrepital system, the cost of space flight goes down enormously.
If this system, at 1/3 scale works on earth, it would easily work on the Moon to send payloads back to the Earth, where the escape velocity is less than 1/10 the orbital velocity from the earth.
1/10th the velocity means only 1% of the energy is needed to return to the earth from the moon, as to orbit the earth.