Rayleigh 1899: assume product-of-powers form Q = prod x_i^{a_i}; match dimensions of [Q] with [x_i^{a_i}]; predates Buckingham; used for drag-coefficient + Reynolds-number derivation.
Rayleigh 1899: assume product-of-powers form Q = prod x_i^{a_i}; match dimensions of [Q] with [x_i^{a_i}]; predates Buckingham; used for drag-coefficient + Reynolds-number derivation.