Wind-Blown Bubbles from Young Clusters: Energy-Driven Growth, Shell Momentum and the End of the Parent Cloud

This paper addresses a single question: How large does the bubble blown by a young cluster's combined stellar winds grow in a million years, and does its shell carry enough momentum to finish dispersing a cloud already loosened by ionised-gas pressure? Using published molecular-cloud and young-stellar-object measurements as inputs, and carrying the spin-torsion density bound of 9.72 x 10^57 kilograms per cubic metre and its critical shear of 8.56 x 10^32 per second as fixed comparison scales, the calculation finds that a cluster with a mechanical wind luminosity of 10^31 watts inflates a bubble roughly twenty parsecs across within a million years in gas of a few hundred particles per cubic centimetre - the size of the parent cloud itself - while a single O star reaches several parsecs; wind bubbles are therefore a cluster-scale finishing mechanism for cloud dispersal, acting on the same million-year clock as ionised-gas expansion and well before most supernovae. The headline values are: R cluster 1Myr pc = 18.9; v cluster km s = 11.1; R single pc = 7.54. All values are computed from the stated formulae and inputs; this is a simulated and computed study, not a measurement. Where the comparison scales supplied by the torsion framework turn out to be too remote to influence the process, that outcome is reported as a negative result rather than passed over.