Could a spinning disk dropped from orbit survive speeds faster than conventional aircraft in our atmosphere? Does the rate of spin matter when dispersing heat? Does a spinning disk create stability from tumbling at hypersonic speeds?
Some hypersonic planes don't appear to have a blunt edge at the nose. I want to say a blunt edge is design either not to melt off and/or help slow the vehicle. I am on the fence if a blunt edge would be needed for a disk that glides in?
Hypersonic Technology Vehicle 2 (HTV-2) is a crewless, experimental hypersonic glide vehicle rocket glider developed as part of the DARPA Falcon Project capable of flying at 13,000 mph (Mach 17.53, 21,000 km/h) https://en.wikipedia.org/wiki/DARPA_Falcon_Project
This is a picture of the experimental HTV-2 sub-orbital hypersonic re-entry glider with a sharp profile but in the form of a disk to disperse heat away from the edge for a higher top speed. Could this wing profile be adapted to a disk?