Acceleration Reality, Δf Elasticity, and Resonant Drive: A Classical-Compatible Mechanism Layer in USP Field Theory

This companion note consolidates three related USP Field Theory developments into a unified, test-oriented framework: • Acceleration Reality (msf:45723) • Δf Elasticity and Inertial Drift • Three-Stage Resonant Engine (TSE-01) conceptual bridge The document presents acceleration as an emergent consequence of mismatch asymmetry (Δf bias) within an elastic corridor structure, while explicitly preserving Newtonian and General Relativistic kinematics in the classical limit. To move beyond conceptual description, the note introduces: – Instrument-accessible proxies for Δf (interferometric phase gradient and spectral shift indices) – A worked order-of-magnitude estimate linking Δf gradients to measurable acceleration scales – Explicit energy accounting for the resonant drive concept (no perpetual-motion claims) – Allowable dissipation channels for any drift or capture interpretation – A classical reduction showing how the effective limit recovers F = ma The framework is presented as a mechanism overlay rather than a replacement of established mechanics. Acceleration emerges from net Δf asymmetry; inertial translation corresponds to quasi-steady corridor states. Figures include Δf elasticity schematics, acceleration-timeline modeling, and energy-flow diagrams. This document functions as a bridge between foundational USP dynamics and applied propulsion discussions.