Looked into actually building a power core (technically a miniature nuclear power plant) but using a quantum field based reaction.
In theory I could build it for a tenth of that cost, but need materials not currently found in nature.
All feasible with terrestrial technology otherwise, if someone can get me even a few grams of this I can use existing materials
and generate a torsional field using dark matter flux at altitude.
Think warp nacelles though it would be limited to a fraction of light speed, this would get me to the Moon and back without
the need for conventional rockets though RCS thrusters would be a useful and necessary backup.
The slight snag is generating a >44T sustained field inside the central core to control the reaction and help regulate, though
can further throttle it using external X-ray emitter tubes of my own design and other methods.
Think of it as a radiometric downconverter that uses intense static magnetic fields to align the spins allowing a reaction to
take place without criticality which allows for a far more compact device.
Also need to build two of them in case one goes bad, with cross connectivity so in an emergency situation the craft is
Interestingly it would work best above 55K feet so can test this simply using a high altitude balloon, this is an approach
I believe pioneered by NASA.
Sharing here in the hope that others had the same ideas.