Design Blueprint: Choosing a Spinning Wheel Drive Ratio

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24119441): Most spinning wheels are sold with two or three drive ratios, selected by moving the drive band between grooves on the whorl, and most instruction treats the choice as a matter of taste: a high ratio for fine yarn, a low ratio for thick. 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.