We're designing a tractor that will have a front mounted PTO and quick connect system and I am unclear on a couple of issues, any response would be greatly appreciated. I am trying to figure out what speed (rpm) the front PTO should run at, I understand that the standards for rear mounted PTO's are 540rpm or 1000rpm but have been told that a front mounted PTO may turn much faster (at engine speed). Also, does anyone know why the accepted values for rear PTO is 540 rpm or 1000 rpm? Secondly, I am wondering if there is an accepted value for comparing engine hp to PTO hp, I have found through research that PTO hp is approx 80-85% engine hp. If I know the design requirement of the power plant is 45 hp may I take that as the PTO hp for initial calculations or must I compensate for losses within the system? The only way I can see doing that is testing a similar power plant and obtaining the PTO hp experimentally. Thank you in advance for any information, Ryan.
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