Design Blueprint: Bounce-Assisted Lunar Lander: Terminal Descent Propellant Saving from a Torsion Cushion Stage

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24123312): The device is a lunar lander of fifteen hundred kilograms dry mass whose final descent segment, from fifteen metres at a stated vertical speed, is absorbed by a torsion cushion stage of the kind characterised in the companion cushion study, instead of by propulsive braking. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.