I am doing a project of hydraulic vehicle. My professor ask our team to install a hydrualic pump and motor in the vehicle. We are considering to purchase a set of hydraulic pump and motor, and we have the following requirements: We have an existing electric motor of 22kW, 60Nm (continous) and 3500rpm (continous) For the hydraulic motor, we would like to achieve: high torque (300Nm) --> low speed (at least 300-500rpm, can be higher) low torque (50Nm) --> high speed (at least 500-1000rpm, can be higher) In both cases, the speed (rpm) should be as high as possible. Does anyone know how to do the calculation? So that we can select a suitable pump and motor combination for our design. :rofl: I really don't know how to do it, please kindly help me!! Thank you very much!!!