Here's something you might be interested in, instead of my usual cautions and complaints about replicable experiments and data.

"https://www.aiaa.org/docs/default-source/uploadedfiles/aiaa-aviation-forum/avas-full-final-program.pdf"

However, when I search that AIAA URL it 404's on me. However, there is a long list of sites that search up that document, and I have the PDF if you can provide a place to send it. Hive doesn't let me post PDF's in comments as it does images. Here's an image from the PDF though.

"HAUC Summary
"• It is possible to design a hybrid craft which by delivering vast
amounts of electromagnetic energy flux in its close proximity can
alter the spacetime energy density in that locality. In this manner, the
craft can move at extreme speeds, due to quantum electrodynamic
Vacuum breakdown effects, which result in inertial mass reduction."

So, this purports to be a means of reducing the inertia of an object with mass, which seems suitable to your purposes and intents in the OP.

Thanks!