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Spencer, D. F.

Publications and source records attributed to Spencer, D. F..

Fusion Propulson System Requirements for an Interstellar Probe

An examination of the engine constraints for a fusion-propelled vehicle indicates that minimum flight times for a probe to a 5 light-year star will be approximately 50 years. The principal restraint on the vehicle is the radiator weight and size necessary to dissipate the heat which enters the chamber walls from the fusion plasma. However, it is interesting, at least theoretically, that the confining magnetic field strength is of reasonable magnitude, 2 to 3 x 10(exp5) gauss, and the confinement time is approximately 0.1 sec.

FUSION↗

FEASIBILITY OF INTERSTELLAR TRAVEL

Interstellar travel using nuclear energy supported by equations for single-stage and multistage rocket propulsion and examples of velocities and transit times

MULTISTAGE ROCKET↗