A Kaplan (propeller with variable-pitch blades) turbine with a rated capacity of \(83 \mathrm{MW}\) at a head of \(24 \mathrm{~m}\) and \(86 \mathrm{rpm}\) was one of 14 units installed at the McNary project on the Columbia River. The characteristic runner diameter is \(7 \mathrm{~m}\). If a \(6-\mathrm{m}\) head is available in the laboratory, what should be the model scale, flow rate, and rpm?