Apparatus for the prediction of performance parameters of a proposed machine, in particular, an agricultural machine, includes a keyboard for entry of data in accordance with a set of input parameters useful in the calculation of performance parameters, a display for displaying performance parameters,...http://www.google.de/patents/US4616328?utm_source=gb-gplus-sharePatent US4616328 - Apparatus for the determination of the technical parameters of machines particularly agricultural machines, based on probable use
