USP Field Theory — Acceleration, Elasticity, and Resonant Propulsion Continuum (v1.1)

This publication unifies three complementary studies under USP Field Theory (Ultra-Sub Particle Field Theory), exploring the nature of acceleration, elasticity, and continuous propulsion through field resonance. The lead paper (Acceleration Reality: Why Constant Speed Is an Illusion) redefines motion as oscillatory Δf compression–relaxation within an elastic field fabric. Supporting documents extend this to inertial drift and hybrid propulsion design (Three-Stage Resonant Engine Concept — TSE-01), demonstrating a theoretical pathway toward uninterrupted acceleration via resonance overlap. Together, they propose a field-driven alternative to classical mechanics, linking gravity, inertia, and thrust through Δf geometry. Contents msf:45723 v1.1 — Acceleration Reality: Why Constant Speed Is an Illusion Δf Elasticity & Inertial Drift (v1.0) Three-Stage Resonant Engine Concept — TSE-01 (v1.1) Author: Sadegh Sepehri Date: November 2025 Version: 1.1 Type: Theoretical physics and conceptual propulsion model