Neo M-Tron 6923 Particle Ionizer. I liked the idea of a space helicopter, but not the execution. Reworked it as a hover/repulsioncraft. Moved the magnetic arm to the underside and added attached
LEGO Space: Particle Ioniser (6923) for sale online | eBay
LEGO Set 6923-1-b3 Suborbital Voyager (1990 Space > M:Tron) | Rebrickable - Build with LEGO