Well, a low orbit is 18,000 miles per hour. This system wants to use 5000 miles per hour in their test of tech. That still leaves 13,000 miles per hour delta V,

Well, a low orbit is 18,000 miles per hour. This system wants to use 5000 miles per hour in their test of tech. That still leaves 13,000 miles per hour delta V, plus atmospheric drag will slow it until the rocket fires. Might be good to build this in Bhutan or another place with flat land over 12,000 feet high = far lower drag to launch. This is a test at 5000 = next 10,000 - how far can the strength of materials go when spinning at these rates? And if they can do both, spin at 10,000 mph+ as well as launch from Bhutan/Hawaii/Chile - it is worth exploring.