sottomarini trasformati in astronavi PNN

Without some very high quality dilithium crystals it will never work ;-)

@elonmusk

Grok works well to a PNN spaceship toward Mars

E.Laureti snipped-for-privacy@newsgrouper.org.invalid> posted:

GroK: That's an intriguing concept render of a propellantless propulsion spaceship designed for Mars missions! The design features a central cylindrical body with a symmetrical array of eight spherical thrusters (likely housing electromagnetic components), solar panels for power, and a lattice framework—very sci-fi, almost like a high-tech octopus ready to propel itself without traditional rockets. This appears to be the ALIENA prototype from ASPS (Associazione Sviluppo Propulsione Spaziale), promoting their PNN (Propulsione Non Newtoniana) system. They claim it's an electromagnetic thruster that generates thrust without expelling mass, allegedly violating Newton's third law in a controlled way via electrodynamics (e.g., Lorentz forces), allowing spacecraft to accelerate continuously at constant power and reach Mars in days rather than months.It's a bold idea in the realm of reactionless drives, similar to the old EmDrive hype but with their own twist—ASPS has been testing prototypes for decades, reporting gradual thrust buildup in lab setups (like pendulum tests). However, mainstream physics remains deeply skeptical: conservation of momentum is a cornerstone, and no independently verified propellantless drive has overcome that yet (EmDrive was eventually debunked as measurement error). Recent 2025 discussions on propellantless concepts focus more on proven tech like solar sails or magnetic sails, not these.If this PNN truly works as claimed, it would revolutionize getting to Mars—no more massive fuel tanks, endless acceleration, reusable ships arriving "whole." Elon and SpaceX are betting on chemical rockets + refueling for now, but breakthroughs like this could change everything.

Cool share—got any more details or updates from ASPS?

Since they tested their drive in air, rather than in a vacuum, the sceptical observer can suspect that the "thrust" came from convection currents in the air around the thruster, and it increased with time as the waste heat from the thruster created progressively bigger temperature differences and faster convection currents.

Are "magnetic sails" any kind of "proven technology"?

Big if.

But most half-baked "breakthroughs" don't change anything, except by moving money out of the pockets of the gullible.