Can We Harness Black Holes for Faster Flybys?

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The discussion explores the theoretical possibility of utilizing the Blandford-Znajek process to harness the rotational energy of charged black holes for accelerating unmanned probes during close flybys. It raises questions about the feasibility of using magnetic field lines as a 'magnetic assist' for increased acceleration. The impact of object mass on this process is also considered, suggesting that smaller particles may be more significantly influenced than larger ones. Additionally, the conversation extends to the potential applicability of this concept to other celestial bodies with strong magnetic fields, such as neutron stars and magnetars. Overall, the idea presents intriguing implications for future space exploration techniques.
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With regards to the Blandford-Znajek process (about which I've only recently become aware), would be possible, at least in theory, to tap into the rotational energy of a charged black hole, this by using its revolving field-lines as a kind of 'magnetic assist' to increase the acceleration of, say, an unmanned probe making a close flyby? Or is this completely potty?
 
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I would like to know if the physics behind this would vary with object mass. I think smaller particles would be greatly affected by this more than larger objects (Because black hole).
 
Moreover, it would be interesting to know if the above also applies to other celestial bodies with a high magnetic flux - neutron stars and magnetars especially.
 

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