That's a really good data point. Thank you very kindly. I suppose it would be nice to take into account the coefficient of friction on that sand spreader machine vs the friction on my spreader. BUT your point is taken. Amazing! I guess if you lower the rpm of a motor by a factor of 1 or more thousands you must really increase the torque!!!

I am still having trouble deciding hydraulic vs small engine. What I really need to know is do hydraulic motors have the capability to run at lower rpms than a gasser? With a gasser I know I will need to run two 100:1 gear boxes. That's a few dollars. Now with a hydraulic I do not know... do they run at 20 rpm or 2000? Can any one tell me? Whilst the rear remotes on my tractor will cost some, and all the hydraulic lines... So will multiple gearboxes. Even the huge pulleys to reduce gearing cost a pretty penny. Is there anyone reading this that can shed light on hydraulics?
Thanks!