Two American firms have conducted successful flight tests of a new solid rocket motor with long-range capabilities. RTX and Colorado-based propulsion firm Ursa Major conducted the test at Naval ...

The motor is a 192kv Turnigy Aerodrive brushless hobby BLDC. Rated for 48v, it's max speed is ~9000 RPM. I don't expect to drive it quite so fast, and it will be geared down with a reduction ...