Running exclusively off jet power would require an extremely (impossibly?) strong compressor stage coupled a powerful APU to generate lift. It's definitely not light enough to take off without tiltrotors.

The concept is the compressed air sent through slits in a thruster, creating negative pressure that draws in surrounding air, resulting in increased thrust, there’s a concept already of this, check the above reply.

From that link, "the system delivers 10% more thrust [...] than a small turbojet."

They are still very deeply limited by compressor technology, regardless of whether they use combustion or electric propulsion.

It will need blades to VTOL.

They do exist, WIP, a bladless VTOL

https://newatlas.com/aircraft/jetoptera-bladeless-hsvtol/

> Jetoptera is developing VTOL (Vertical Take-Off and Landing) aircraft that use a "Fluidic Propulsion System" (FPS) instead of traditional rotors or propellers, acting like "bladeless fans on steroids". These systems use compressed air and the Coanda effect to generate high-speed thrust, promising quieter, more efficient, and faster flight (up to Mach 0.8) for aerial mobility.