Mechanical Power of the Galactic Centre Outflow from the Bubble Energy and Age

This paper examines the Galactic Centre outflow energy rate for the large bipolar structures above and below the Galactic Centre, using only published input values and transparent formulae. The calculation obtains the following headline results: mean_power_age_3Myr_erg_s = 9.875e+41; mean_power_age_6Myr_erg_s = 4.938e+41; mean_power_age_10Myr_erg_s = 2.963e+41; mean_power_age_20Myr_erg_s = 1.481e+41; mean_power_age_30Myr_erg_s = 9.875e+40; supernova_power_central_SFR_erg_s = 2.218e+40. Each quantity is derived step by step from the stated inputs, so that any reader can reproduce or rescale every number from the deposited calculation script in the case of the Galactic Centre outflow energy rate. For the Galactic Centre outflow energy rate, the results are compared with independent published estimates where those exist, and disagreements are reported at their actual size rather than absorbed into the assumptions. The conclusions are limited to what the budget arithmetic supports: the Galactic Centre outflow energy rate is constrained to the range the current published values permit, and the dominant remaining uncertainty is identified explicitly.